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Inductor current can't be suddenly cutoff if no freewheel diode is attached

Started by Patrick Chung September 2, 2013
On Thu, 05 Sep 2013 12:25:05 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

>On Thu, 05 Sep 2013 11:28:30 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Thu, 05 Sep 2013 11:21:01 -0700, John Larkin >><jlarkin@highlandtechnology.com> wrote: >> >>>On Thu, 05 Sep 2013 11:04:09 -0700, Jim Thompson >>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>> >>>>On Thu, 05 Sep 2013 10:57:19 -0700, John Larkin >>>><jlarkin@highlandtechnology.com> wrote: >>>> >>>>>On Wed, 04 Sep 2013 20:57:37 -0800, Robert Baer >>>>><robertbaer@localnet.com> wrote: >>>>> >>>>>>Jim Thompson wrote: >>>>>>> On Tue, 03 Sep 2013 12:01:57 +1000, Sylvia Else >>>>>>> <sylvia@not.at.this.address> wrote: >>>>>>> >>>>>>>> On 3/09/2013 4:44 AM, Jim Thompson wrote: >>>>>>>>> On Mon, 02 Sep 2013 10:43:09 -0700, Robert Baer >>>>>>>>> <robertbaer@localnet.com> wrote: >>>>>>>>> >>>>>>>>>> Patrick Chung wrote: >>>>>>>>>>> Inductor current can't be suddenly cutoff if no freewheel diode is attached. New tutorial is ready >>>>>>>>>>> >>>>>>>>>>> http://www.cirvirlab.com/index.php/tutorials/105-r-l-circuit-with-mosfet-as-switch-and-freewheel-diode.html >>>>>>>>>>> >>>>>>>>>>> and online simulation >>>>>>>>>>> >>>>>>>>>>> http://www.cirvirlab.com/simulation/r-l_circuit_with_mosfet_as_switch_and_freewheel_diode.php >>>>>>>>>> NOT true! >>>>>>>>>> Look a ten million or so car ignition systems since the late 1800's. >>>>>>>>> >>>>>>>>> Depends on your definition of "suddenly">:-} >>>>>>>>> >>>>>>>>> ...Jim Thompson >>>>>>>>> >>>>>>>> >>>>>>>> Or indeed, on your definition of cut off. >>>>>>>> >>>>>>>> Sylvia. >>>>>>> >>>>>>> Oh, please! Oh, please! Don't cut it off>:-} >>>>>>> >>>>>>> ...Jim Thompson >>>>>> Will there be a song now "Do the Bobbit? >>>>> >>>>>It's interesting that, whenever a woman posts here, there are guys, >>>>>presumably either horny teenagers or senile old gits, who start up >>>>>snarky sexual innuendo. They're not even very good at it. >>>>> >>>>>See the same thing in s.e.b. >>>> >>>>Designed any "cute" circuits lately ?:-) >>>> >>>> ...Jim Thompson >>> >>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_and_Fixture.jpg >>> >>>The big board is the test fixture. The little board (I think 0.75x2" >>>qualifies as "cute") is a 150+ amp, 4ish kilowatt precision laser >>>driver, with onboard boost-doubler converter. The one that you didn't >>>like. >>> >>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_200A_Pulse.JPG >>> >>>The Brat did beautiful PCB layouts on these. They both worked first >>>time. The customer connected +10 to the 5 volt supply and blew up the >>>first one that we shipped, but these things happen. >>> >>>Currently I'm working on an active magnetic field shield, an aircraft >>>engine transducer simulator, some thermal stuff for an EUV photodiode >>>digitizer, and some optical stuff having to do with semiconductor fab. >>>And still tweaking my shrimp-and-grits and bread pudding recipes. >>> >>>How about you? Still working? >> >>Yep. Still cranking out custom chips. >> >>Will you show us the final schematic of the boost-doubler? As >>originally posted it _did_ have problems. >> >> ...Jim Thompson > >What problems? > >This is essentially the same as the "bubbler" circuit I posted >previously. Here's the (censored) schematic of the real thing: > >https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost-Doubler.pdf > >It's tiny and it works great. It's simple, efficient, and very >tunable. The current pulled from the customer's supply, during >chargeup or recharge, is nearly flat and is easily settable.
Bwahahahahahaha! What did I expect ?>:-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Thu, 05 Sep 2013 17:59:21 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Thu, 05 Sep 2013 12:25:05 -0700, John Larkin ><jlarkin@highlandtechnology.com> wrote: > >>On Thu, 05 Sep 2013 11:28:30 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Thu, 05 Sep 2013 11:21:01 -0700, John Larkin >>><jlarkin@highlandtechnology.com> wrote: >>> >>>>On Thu, 05 Sep 2013 11:04:09 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>>>On Thu, 05 Sep 2013 10:57:19 -0700, John Larkin >>>>><jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>>On Wed, 04 Sep 2013 20:57:37 -0800, Robert Baer >>>>>><robertbaer@localnet.com> wrote: >>>>>> >>>>>>>Jim Thompson wrote: >>>>>>>> On Tue, 03 Sep 2013 12:01:57 +1000, Sylvia Else >>>>>>>> <sylvia@not.at.this.address> wrote: >>>>>>>> >>>>>>>>> On 3/09/2013 4:44 AM, Jim Thompson wrote: >>>>>>>>>> On Mon, 02 Sep 2013 10:43:09 -0700, Robert Baer >>>>>>>>>> <robertbaer@localnet.com> wrote: >>>>>>>>>> >>>>>>>>>>> Patrick Chung wrote: >>>>>>>>>>>> Inductor current can't be suddenly cutoff if no freewheel diode is attached. New tutorial is ready >>>>>>>>>>>> >>>>>>>>>>>> http://www.cirvirlab.com/index.php/tutorials/105-r-l-circuit-with-mosfet-as-switch-and-freewheel-diode.html >>>>>>>>>>>> >>>>>>>>>>>> and online simulation >>>>>>>>>>>> >>>>>>>>>>>> http://www.cirvirlab.com/simulation/r-l_circuit_with_mosfet_as_switch_and_freewheel_diode.php >>>>>>>>>>> NOT true! >>>>>>>>>>> Look a ten million or so car ignition systems since the late 1800's. >>>>>>>>>> >>>>>>>>>> Depends on your definition of "suddenly">:-} >>>>>>>>>> >>>>>>>>>> ...Jim Thompson >>>>>>>>>> >>>>>>>>> >>>>>>>>> Or indeed, on your definition of cut off. >>>>>>>>> >>>>>>>>> Sylvia. >>>>>>>> >>>>>>>> Oh, please! Oh, please! Don't cut it off>:-} >>>>>>>> >>>>>>>> ...Jim Thompson >>>>>>> Will there be a song now "Do the Bobbit? >>>>>> >>>>>>It's interesting that, whenever a woman posts here, there are guys, >>>>>>presumably either horny teenagers or senile old gits, who start up >>>>>>snarky sexual innuendo. They're not even very good at it. >>>>>> >>>>>>See the same thing in s.e.b. >>>>> >>>>>Designed any "cute" circuits lately ?:-) >>>>> >>>>> ...Jim Thompson >>>> >>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_and_Fixture.jpg >>>> >>>>The big board is the test fixture. The little board (I think 0.75x2" >>>>qualifies as "cute") is a 150+ amp, 4ish kilowatt precision laser >>>>driver, with onboard boost-doubler converter. The one that you didn't >>>>like. >>>> >>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_200A_Pulse.JPG >>>> >>>>The Brat did beautiful PCB layouts on these. They both worked first >>>>time. The customer connected +10 to the 5 volt supply and blew up the >>>>first one that we shipped, but these things happen. >>>> >>>>Currently I'm working on an active magnetic field shield, an aircraft >>>>engine transducer simulator, some thermal stuff for an EUV photodiode >>>>digitizer, and some optical stuff having to do with semiconductor fab. >>>>And still tweaking my shrimp-and-grits and bread pudding recipes. >>>> >>>>How about you? Still working? >>> >>>Yep. Still cranking out custom chips. >>> >>>Will you show us the final schematic of the boost-doubler? As >>>originally posted it _did_ have problems. >>> >>> ...Jim Thompson >> >>What problems? >> >>This is essentially the same as the "bubbler" circuit I posted >>previously. Here's the (censored) schematic of the real thing: >> >>https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost-Doubler.pdf >> >>It's tiny and it works great. It's simple, efficient, and very >>tunable. The current pulled from the customer's supply, during >>chargeup or recharge, is nearly flat and is easily settable. > >Bwahahahahahaha! What did I expect ?>:-} > > ...Jim Thompson
I expect to sell several thousand of them. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
On Thu, 05 Sep 2013 18:37:56 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

>On Thu, 05 Sep 2013 17:59:21 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Thu, 05 Sep 2013 12:25:05 -0700, John Larkin >><jlarkin@highlandtechnology.com> wrote: >> >>>On Thu, 05 Sep 2013 11:28:30 -0700, Jim Thompson >>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>> >>>>On Thu, 05 Sep 2013 11:21:01 -0700, John Larkin >>>><jlarkin@highlandtechnology.com> wrote: >>>> >>>>>On Thu, 05 Sep 2013 11:04:09 -0700, Jim Thompson >>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>> >>>>>>On Thu, 05 Sep 2013 10:57:19 -0700, John Larkin >>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>> >>>>>>>On Wed, 04 Sep 2013 20:57:37 -0800, Robert Baer >>>>>>><robertbaer@localnet.com> wrote: >>>>>>> >>>>>>>>Jim Thompson wrote: >>>>>>>>> On Tue, 03 Sep 2013 12:01:57 +1000, Sylvia Else >>>>>>>>> <sylvia@not.at.this.address> wrote: >>>>>>>>> >>>>>>>>>> On 3/09/2013 4:44 AM, Jim Thompson wrote: >>>>>>>>>>> On Mon, 02 Sep 2013 10:43:09 -0700, Robert Baer >>>>>>>>>>> <robertbaer@localnet.com> wrote: >>>>>>>>>>> >>>>>>>>>>>> Patrick Chung wrote: >>>>>>>>>>>>> Inductor current can't be suddenly cutoff if no freewheel diode is attached. New tutorial is ready >>>>>>>>>>>>> >>>>>>>>>>>>> http://www.cirvirlab.com/index.php/tutorials/105-r-l-circuit-with-mosfet-as-switch-and-freewheel-diode.html >>>>>>>>>>>>> >>>>>>>>>>>>> and online simulation >>>>>>>>>>>>> >>>>>>>>>>>>> http://www.cirvirlab.com/simulation/r-l_circuit_with_mosfet_as_switch_and_freewheel_diode.php >>>>>>>>>>>> NOT true! >>>>>>>>>>>> Look a ten million or so car ignition systems since the late 1800's. >>>>>>>>>>> >>>>>>>>>>> Depends on your definition of "suddenly">:-} >>>>>>>>>>> >>>>>>>>>>> ...Jim Thompson >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Or indeed, on your definition of cut off. >>>>>>>>>> >>>>>>>>>> Sylvia. >>>>>>>>> >>>>>>>>> Oh, please! Oh, please! Don't cut it off>:-} >>>>>>>>> >>>>>>>>> ...Jim Thompson >>>>>>>> Will there be a song now "Do the Bobbit? >>>>>>> >>>>>>>It's interesting that, whenever a woman posts here, there are guys, >>>>>>>presumably either horny teenagers or senile old gits, who start up >>>>>>>snarky sexual innuendo. They're not even very good at it. >>>>>>> >>>>>>>See the same thing in s.e.b. >>>>>> >>>>>>Designed any "cute" circuits lately ?:-) >>>>>> >>>>>> ...Jim Thompson >>>>> >>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_and_Fixture.jpg >>>>> >>>>>The big board is the test fixture. The little board (I think 0.75x2" >>>>>qualifies as "cute") is a 150+ amp, 4ish kilowatt precision laser >>>>>driver, with onboard boost-doubler converter. The one that you didn't >>>>>like. >>>>> >>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_200A_Pulse.JPG >>>>> >>>>>The Brat did beautiful PCB layouts on these. They both worked first >>>>>time. The customer connected +10 to the 5 volt supply and blew up the >>>>>first one that we shipped, but these things happen. >>>>> >>>>>Currently I'm working on an active magnetic field shield, an aircraft >>>>>engine transducer simulator, some thermal stuff for an EUV photodiode >>>>>digitizer, and some optical stuff having to do with semiconductor fab. >>>>>And still tweaking my shrimp-and-grits and bread pudding recipes. >>>>> >>>>>How about you? Still working? >>>> >>>>Yep. Still cranking out custom chips. >>>> >>>>Will you show us the final schematic of the boost-doubler? As >>>>originally posted it _did_ have problems. >>>> >>>> ...Jim Thompson >>> >>>What problems? >>> >>>This is essentially the same as the "bubbler" circuit I posted >>>previously. Here's the (censored) schematic of the real thing: >>> >>>https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost-Doubler.pdf >>> >>>It's tiny and it works great. It's simple, efficient, and very >>>tunable. The current pulled from the customer's supply, during >>>chargeup or recharge, is nearly flat and is easily settable. >> >>Bwahahahahahaha! What did I expect ?>:-} >> >> ...Jim Thompson > >I expect to sell several thousand of them.
How much crap you sell is immaterial. You're supposed to "educate" us. Bwahahahahahahahaha! ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Thu, 05 Sep 2013 18:49:31 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Thu, 05 Sep 2013 18:37:56 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Thu, 05 Sep 2013 17:59:21 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Thu, 05 Sep 2013 12:25:05 -0700, John Larkin >>><jlarkin@highlandtechnology.com> wrote: >>> >>>>On Thu, 05 Sep 2013 11:28:30 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>>>On Thu, 05 Sep 2013 11:21:01 -0700, John Larkin >>>>><jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>>On Thu, 05 Sep 2013 11:04:09 -0700, Jim Thompson >>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>> >>>>>>>On Thu, 05 Sep 2013 10:57:19 -0700, John Larkin >>>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>>> >>>>>>>>On Wed, 04 Sep 2013 20:57:37 -0800, Robert Baer >>>>>>>><robertbaer@localnet.com> wrote: >>>>>>>> >>>>>>>>>Jim Thompson wrote: >>>>>>>>>> On Tue, 03 Sep 2013 12:01:57 +1000, Sylvia Else >>>>>>>>>> <sylvia@not.at.this.address> wrote: >>>>>>>>>> >>>>>>>>>>> On 3/09/2013 4:44 AM, Jim Thompson wrote: >>>>>>>>>>>> On Mon, 02 Sep 2013 10:43:09 -0700, Robert Baer >>>>>>>>>>>> <robertbaer@localnet.com> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> Patrick Chung wrote: >>>>>>>>>>>>>> Inductor current can't be suddenly cutoff if no freewheel diode is attached. New tutorial is ready >>>>>>>>>>>>>> >>>>>>>>>>>>>> http://www.cirvirlab.com/index.php/tutorials/105-r-l-circuit-with-mosfet-as-switch-and-freewheel-diode.html >>>>>>>>>>>>>> >>>>>>>>>>>>>> and online simulation >>>>>>>>>>>>>> >>>>>>>>>>>>>> http://www.cirvirlab.com/simulation/r-l_circuit_with_mosfet_as_switch_and_freewheel_diode.php >>>>>>>>>>>>> NOT true! >>>>>>>>>>>>> Look a ten million or so car ignition systems since the late 1800's. >>>>>>>>>>>> >>>>>>>>>>>> Depends on your definition of "suddenly">:-} >>>>>>>>>>>> >>>>>>>>>>>> ...Jim Thompson >>>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> Or indeed, on your definition of cut off. >>>>>>>>>>> >>>>>>>>>>> Sylvia. >>>>>>>>>> >>>>>>>>>> Oh, please! Oh, please! Don't cut it off>:-} >>>>>>>>>> >>>>>>>>>> ...Jim Thompson >>>>>>>>> Will there be a song now "Do the Bobbit? >>>>>>>> >>>>>>>>It's interesting that, whenever a woman posts here, there are guys, >>>>>>>>presumably either horny teenagers or senile old gits, who start up >>>>>>>>snarky sexual innuendo. They're not even very good at it. >>>>>>>> >>>>>>>>See the same thing in s.e.b. >>>>>>> >>>>>>>Designed any "cute" circuits lately ?:-) >>>>>>> >>>>>>> ...Jim Thompson >>>>>> >>>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_and_Fixture.jpg >>>>>> >>>>>>The big board is the test fixture. The little board (I think 0.75x2" >>>>>>qualifies as "cute") is a 150+ amp, 4ish kilowatt precision laser >>>>>>driver, with onboard boost-doubler converter. The one that you didn't >>>>>>like. >>>>>> >>>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_200A_Pulse.JPG >>>>>> >>>>>>The Brat did beautiful PCB layouts on these. They both worked first >>>>>>time. The customer connected +10 to the 5 volt supply and blew up the >>>>>>first one that we shipped, but these things happen. >>>>>> >>>>>>Currently I'm working on an active magnetic field shield, an aircraft >>>>>>engine transducer simulator, some thermal stuff for an EUV photodiode >>>>>>digitizer, and some optical stuff having to do with semiconductor fab. >>>>>>And still tweaking my shrimp-and-grits and bread pudding recipes. >>>>>> >>>>>>How about you? Still working? >>>>> >>>>>Yep. Still cranking out custom chips. >>>>> >>>>>Will you show us the final schematic of the boost-doubler? As >>>>>originally posted it _did_ have problems. >>>>> >>>>> ...Jim Thompson >>>> >>>>What problems? >>>> >>>>This is essentially the same as the "bubbler" circuit I posted >>>>previously. Here's the (censored) schematic of the real thing: >>>> >>>>https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost-Doubler.pdf >>>> >>>>It's tiny and it works great. It's simple, efficient, and very >>>>tunable. The current pulled from the customer's supply, during >>>>chargeup or recharge, is nearly flat and is easily settable. >>> >>>Bwahahahahahaha! What did I expect ?>:-} >>> >>> ...Jim Thompson >> >>I expect to sell several thousand of them. > >How much crap you sell is immaterial. > >You're supposed to "educate" us. Bwahahahahahahahaha! > > ...Jim Thompson
Why don't you educate us, by telling us what "problems" this circuit has. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
On Thu, 05 Sep 2013 21:29:22 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

>On Thu, 05 Sep 2013 18:49:31 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Thu, 05 Sep 2013 18:37:56 -0700, John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >> >>>On Thu, 05 Sep 2013 17:59:21 -0700, Jim Thompson >>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>> >>>>On Thu, 05 Sep 2013 12:25:05 -0700, John Larkin >>>><jlarkin@highlandtechnology.com> wrote: >>>> >>>>>On Thu, 05 Sep 2013 11:28:30 -0700, Jim Thompson >>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>> >>>>>>On Thu, 05 Sep 2013 11:21:01 -0700, John Larkin >>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>> >>>>>>>On Thu, 05 Sep 2013 11:04:09 -0700, Jim Thompson >>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>> >>>>>>>>On Thu, 05 Sep 2013 10:57:19 -0700, John Larkin >>>>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>>>> >>>>>>>>>On Wed, 04 Sep 2013 20:57:37 -0800, Robert Baer >>>>>>>>><robertbaer@localnet.com> wrote: >>>>>>>>> >>>>>>>>>>Jim Thompson wrote: >>>>>>>>>>> On Tue, 03 Sep 2013 12:01:57 +1000, Sylvia Else >>>>>>>>>>> <sylvia@not.at.this.address> wrote: >>>>>>>>>>> >>>>>>>>>>>> On 3/09/2013 4:44 AM, Jim Thompson wrote: >>>>>>>>>>>>> On Mon, 02 Sep 2013 10:43:09 -0700, Robert Baer >>>>>>>>>>>>> <robertbaer@localnet.com> wrote: >>>>>>>>>>>>> >>>>>>>>>>>>>> Patrick Chung wrote: >>>>>>>>>>>>>>> Inductor current can't be suddenly cutoff if no freewheel diode is attached. New tutorial is ready >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> http://www.cirvirlab.com/index.php/tutorials/105-r-l-circuit-with-mosfet-as-switch-and-freewheel-diode.html >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> and online simulation >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> http://www.cirvirlab.com/simulation/r-l_circuit_with_mosfet_as_switch_and_freewheel_diode.php >>>>>>>>>>>>>> NOT true! >>>>>>>>>>>>>> Look a ten million or so car ignition systems since the late 1800's. >>>>>>>>>>>>> >>>>>>>>>>>>> Depends on your definition of "suddenly">:-} >>>>>>>>>>>>> >>>>>>>>>>>>> ...Jim Thompson >>>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Or indeed, on your definition of cut off. >>>>>>>>>>>> >>>>>>>>>>>> Sylvia. >>>>>>>>>>> >>>>>>>>>>> Oh, please! Oh, please! Don't cut it off>:-} >>>>>>>>>>> >>>>>>>>>>> ...Jim Thompson >>>>>>>>>> Will there be a song now "Do the Bobbit? >>>>>>>>> >>>>>>>>>It's interesting that, whenever a woman posts here, there are guys, >>>>>>>>>presumably either horny teenagers or senile old gits, who start up >>>>>>>>>snarky sexual innuendo. They're not even very good at it. >>>>>>>>> >>>>>>>>>See the same thing in s.e.b. >>>>>>>> >>>>>>>>Designed any "cute" circuits lately ?:-) >>>>>>>> >>>>>>>> ...Jim Thompson >>>>>>> >>>>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_and_Fixture.jpg >>>>>>> >>>>>>>The big board is the test fixture. The little board (I think 0.75x2" >>>>>>>qualifies as "cute") is a 150+ amp, 4ish kilowatt precision laser >>>>>>>driver, with onboard boost-doubler converter. The one that you didn't >>>>>>>like. >>>>>>> >>>>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_200A_Pulse.JPG >>>>>>> >>>>>>>The Brat did beautiful PCB layouts on these. They both worked first >>>>>>>time. The customer connected +10 to the 5 volt supply and blew up the >>>>>>>first one that we shipped, but these things happen. >>>>>>> >>>>>>>Currently I'm working on an active magnetic field shield, an aircraft >>>>>>>engine transducer simulator, some thermal stuff for an EUV photodiode >>>>>>>digitizer, and some optical stuff having to do with semiconductor fab. >>>>>>>And still tweaking my shrimp-and-grits and bread pudding recipes. >>>>>>> >>>>>>>How about you? Still working? >>>>>> >>>>>>Yep. Still cranking out custom chips. >>>>>> >>>>>>Will you show us the final schematic of the boost-doubler? As >>>>>>originally posted it _did_ have problems. >>>>>> >>>>>> ...Jim Thompson >>>>> >>>>>What problems? >>>>> >>>>>This is essentially the same as the "bubbler" circuit I posted >>>>>previously. Here's the (censored) schematic of the real thing: >>>>> >>>>>https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost-Doubler.pdf >>>>> >>>>>It's tiny and it works great. It's simple, efficient, and very >>>>>tunable. The current pulled from the customer's supply, during >>>>>chargeup or recharge, is nearly flat and is easily settable. >>>> >>>>Bwahahahahahaha! What did I expect ?>:-} >>>> >>>> ...Jim Thompson >>> >>>I expect to sell several thousand of them. >> >>How much crap you sell is immaterial. >> >>You're supposed to "educate" us. Bwahahahahahahahaha! >> >> ...Jim Thompson > >Why don't you educate us, by telling us what "problems" this circuit has.
I did, related to your original LTspice schematic. You alluded to some fixes, but have not posted them. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Fri, 06 Sep 2013 08:36:01 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Thu, 05 Sep 2013 21:29:22 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Thu, 05 Sep 2013 18:49:31 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Thu, 05 Sep 2013 18:37:56 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Thu, 05 Sep 2013 17:59:21 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>>>On Thu, 05 Sep 2013 12:25:05 -0700, John Larkin >>>>><jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>>On Thu, 05 Sep 2013 11:28:30 -0700, Jim Thompson >>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>> >>>>>>>On Thu, 05 Sep 2013 11:21:01 -0700, John Larkin >>>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>>> >>>>>>>>On Thu, 05 Sep 2013 11:04:09 -0700, Jim Thompson >>>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>>> >>>>>>>>>On Thu, 05 Sep 2013 10:57:19 -0700, John Larkin >>>>>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>>>>> >>>>>>>>>>On Wed, 04 Sep 2013 20:57:37 -0800, Robert Baer >>>>>>>>>><robertbaer@localnet.com> wrote: >>>>>>>>>> >>>>>>>>>>>Jim Thompson wrote: >>>>>>>>>>>> On Tue, 03 Sep 2013 12:01:57 +1000, Sylvia Else >>>>>>>>>>>> <sylvia@not.at.this.address> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> On 3/09/2013 4:44 AM, Jim Thompson wrote: >>>>>>>>>>>>>> On Mon, 02 Sep 2013 10:43:09 -0700, Robert Baer >>>>>>>>>>>>>> <robertbaer@localnet.com> wrote: >>>>>>>>>>>>>> >>>>>>>>>>>>>>> Patrick Chung wrote: >>>>>>>>>>>>>>>> Inductor current can't be suddenly cutoff if no freewheel diode is attached. New tutorial is ready >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> http://www.cirvirlab.com/index.php/tutorials/105-r-l-circuit-with-mosfet-as-switch-and-freewheel-diode.html >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> and online simulation >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> http://www.cirvirlab.com/simulation/r-l_circuit_with_mosfet_as_switch_and_freewheel_diode.php >>>>>>>>>>>>>>> NOT true! >>>>>>>>>>>>>>> Look a ten million or so car ignition systems since the late 1800's. >>>>>>>>>>>>>> >>>>>>>>>>>>>> Depends on your definition of "suddenly">:-} >>>>>>>>>>>>>> >>>>>>>>>>>>>> ...Jim Thompson >>>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> Or indeed, on your definition of cut off. >>>>>>>>>>>>> >>>>>>>>>>>>> Sylvia. >>>>>>>>>>>> >>>>>>>>>>>> Oh, please! Oh, please! Don't cut it off>:-} >>>>>>>>>>>> >>>>>>>>>>>> ...Jim Thompson >>>>>>>>>>> Will there be a song now "Do the Bobbit? >>>>>>>>>> >>>>>>>>>>It's interesting that, whenever a woman posts here, there are guys, >>>>>>>>>>presumably either horny teenagers or senile old gits, who start up >>>>>>>>>>snarky sexual innuendo. They're not even very good at it. >>>>>>>>>> >>>>>>>>>>See the same thing in s.e.b. >>>>>>>>> >>>>>>>>>Designed any "cute" circuits lately ?:-) >>>>>>>>> >>>>>>>>> ...Jim Thompson >>>>>>>> >>>>>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_and_Fixture.jpg >>>>>>>> >>>>>>>>The big board is the test fixture. The little board (I think 0.75x2" >>>>>>>>qualifies as "cute") is a 150+ amp, 4ish kilowatt precision laser >>>>>>>>driver, with onboard boost-doubler converter. The one that you didn't >>>>>>>>like. >>>>>>>> >>>>>>>>https://dl.dropboxusercontent.com/u/53724080/Optos/D140_200A_Pulse.JPG >>>>>>>> >>>>>>>>The Brat did beautiful PCB layouts on these. They both worked first >>>>>>>>time. The customer connected +10 to the 5 volt supply and blew up the >>>>>>>>first one that we shipped, but these things happen. >>>>>>>> >>>>>>>>Currently I'm working on an active magnetic field shield, an aircraft >>>>>>>>engine transducer simulator, some thermal stuff for an EUV photodiode >>>>>>>>digitizer, and some optical stuff having to do with semiconductor fab. >>>>>>>>And still tweaking my shrimp-and-grits and bread pudding recipes. >>>>>>>> >>>>>>>>How about you? Still working? >>>>>>> >>>>>>>Yep. Still cranking out custom chips. >>>>>>> >>>>>>>Will you show us the final schematic of the boost-doubler? As >>>>>>>originally posted it _did_ have problems. >>>>>>> >>>>>>> ...Jim Thompson >>>>>> >>>>>>What problems? >>>>>> >>>>>>This is essentially the same as the "bubbler" circuit I posted >>>>>>previously. Here's the (censored) schematic of the real thing: >>>>>> >>>>>>https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost-Doubler.pdf >>>>>> >>>>>>It's tiny and it works great. It's simple, efficient, and very >>>>>>tunable. The current pulled from the customer's supply, during >>>>>>chargeup or recharge, is nearly flat and is easily settable. >>>>> >>>>>Bwahahahahahaha! What did I expect ?>:-} >>>>> >>>>> ...Jim Thompson >>>> >>>>I expect to sell several thousand of them. >>> >>>How much crap you sell is immaterial. >>> >>>You're supposed to "educate" us. Bwahahahahahahahaha! >>> >>> ...Jim Thompson >> >>Why don't you educate us, by telling us what "problems" this circuit has. > >I did, related to your original LTspice schematic. You alluded to >some fixes, but have not posted them. > > ...Jim Thompson
I just posted the PADS schematic, the one I used on the actual, working, paid-for boards. What's wrong with it? Be specific, if you remember how. Your bwahahas and stupid smilies are pathetic. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
On Fri, 06 Sep 2013 09:11:48 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

>On Fri, 06 Sep 2013 08:36:01 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >
[snip]
>>> >>>Why don't you educate us, by telling us what "problems" this circuit has. >> >>I did, related to your original LTspice schematic. You alluded to >>some fixes, but have not posted them. >> >> ...Jim Thompson > >I just posted the PADS schematic, the one I used on the actual, working, >paid-for boards. What's wrong with it? Be specific, if you remember how. Your >bwahahas and stupid smilies are pathetic.
Got a message ID? I'm not finding a schematic. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Fri, 06 Sep 2013 09:52:11 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Fri, 06 Sep 2013 09:11:48 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Fri, 06 Sep 2013 08:36:01 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >[snip] >>>> >>>>Why don't you educate us, by telling us what "problems" this circuit has. >>> >>>I did, related to your original LTspice schematic. You alluded to >>>some fixes, but have not posted them. >>> >>> ...Jim Thompson >> >>I just posted the PADS schematic, the one I used on the actual, working, >>paid-for boards. What's wrong with it? Be specific, if you remember how. Your >>bwahahas and stupid smilies are pathetic. > >Got a message ID? I'm not finding a schematic. > > ...Jim Thompson
Found it. You fixed it by adding current trip rather than the oscillator-only in your first post. (As I posted in several versions right after your original post.) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Fri, 06 Sep 2013 10:02:07 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Fri, 06 Sep 2013 09:52:11 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Fri, 06 Sep 2013 09:11:48 -0700, John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >> >>>On Fri, 06 Sep 2013 08:36:01 -0700, Jim Thompson >>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>> >>[snip] >>>>> >>>>>Why don't you educate us, by telling us what "problems" this circuit has. >>>> >>>>I did, related to your original LTspice schematic. You alluded to >>>>some fixes, but have not posted them. >>>> >>>> ...Jim Thompson >>> >>>I just posted the PADS schematic, the one I used on the actual, working, >>>paid-for boards. What's wrong with it? Be specific, if you remember how. Your >>>bwahahas and stupid smilies are pathetic. >> >>Got a message ID? I'm not finding a schematic. >> >> ...Jim Thompson > >Found it. You fixed it by adding current trip rather than the >oscillator-only in your first post. (As I posted in several versions >right after your original post.) > > ...Jim Thompson
I've posted many switcher circuits over the years, and some were open-loop oscillators. But in this case, I did post a Spice model of the full circuit, adaptive peak current limiting, boost-doubler, and capacitor pre-charge. I put this up on July 13 https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Schmitt_Bubbler_1.jpg I made only a couple of minor tweaks for the real thing. "Pretty Dumb Boost" from late June https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost_Schmitt.jpg worked fine, but the customer load current, during charge, wasn't as constant as I'd like it, so I went to a single-winding boost/doubler added the adaptive peak current thing. So, where are the "problems." ? -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
On Fri, 06 Sep 2013 10:28:37 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

>On Fri, 06 Sep 2013 10:02:07 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Fri, 06 Sep 2013 09:52:11 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Fri, 06 Sep 2013 09:11:48 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Fri, 06 Sep 2013 08:36:01 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>[snip] >>>>>> >>>>>>Why don't you educate us, by telling us what "problems" this circuit has. >>>>> >>>>>I did, related to your original LTspice schematic. You alluded to >>>>>some fixes, but have not posted them. >>>>> >>>>> ...Jim Thompson >>>> >>>>I just posted the PADS schematic, the one I used on the actual, working, >>>>paid-for boards. What's wrong with it? Be specific, if you remember how. Your >>>>bwahahas and stupid smilies are pathetic. >>> >>>Got a message ID? I'm not finding a schematic. >>> >>> ...Jim Thompson >> >>Found it. You fixed it by adding current trip rather than the >>oscillator-only in your first post. (As I posted in several versions >>right after your original post.) >> >> ...Jim Thompson > >I've posted many switcher circuits over the years, and some were >open-loop oscillators. But in this case, I did post a Spice model of >the full circuit, adaptive peak current limiting, boost-doubler, and >capacitor pre-charge. > >I put this up on July 13 > >https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Schmitt_Bubbler_1.jpg > >I made only a couple of minor tweaks for the real thing. > >"Pretty Dumb Boost" from late June > >https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/Boost_Schmitt.jpg > >worked fine, but the customer load current, during charge, wasn't as >constant as I'd like it, so I went to a single-winding boost/doubler >added the adaptive peak current thing.
That's the one I remember that lacked a current trip.
> >So, where are the "problems." ?
My unease was with that original version, with no current control. If you're happy, I'm happy ;-) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.