On 5/18/2017 8:06 PM, cameo wrote:> On 5/16/2017 8:01 AM, Jim Thompson wrote: >> I just found out... Tom Frederiksen, RIP... >> >> <http://www.legacy.com/obituaries/mercurynews/obituary.aspx?pid=175736155> >> >> >> Tom and I shared a cubicle at Motorola Semiconductor Products Division >> during the early to mid-60's. >> >> ...Jim Thompson >> > With that name I assume Jim had Swedish family background and I always > knew that for some reasons Swedes were great engineers. RIP,Oops, I mixed up Jim's name with Tom's. Sorry.
Tom Frederiksen, RIP
Started by ●May 16, 2017
Reply by ●May 19, 20172017-05-19
Reply by ●May 19, 20172017-05-19
On Friday, May 19, 2017 at 12:40:04 PM UTC+10, Winfield Hill wrote:> Jim Thompson wrote... > > > >On 18 May 2017 18:37:15 -0700, Winfield Hill > ><hill@rowland.harvard.edu> wrote: > > > >>Jim Thompson wrote... > >>> > >>>Winfield Hill wrote: > >>>> Jim Thompson wrote... > >>>>> Lasse Langwadt Christensen wrote: > >>>>>> Winfield Hill wrote: > >>>>>>> bill.sloman@ieee.org wrote... > >>>>>>>> > >>>>>>>> But Jim can't name an integrated circuit he designed. ... > >>>>>>> > >>>>>>> I know he was a specialist in high-power IC design, > >>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power > >>>>>>> Series Voltage Regulator", and with James Solomon, > >>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power > >>>>>>> Amplifier"; both were probably Motorola parts. And > >>>>>>> I have his paper on a Monolithic-Sonar-System. There > >>>>>>> are likely many more papers if one were to look. He > >>>>>>> also had patents, which I have stored in my computer. > >>> > >>> I'll browse the patents and can probably identify those > >>> products that are Motorola's. > >> > >> I'm curious about the two Motorola papers I quoted. > > > > I'm not sure they are Motorola papers. By 1968, they both may > > have left Motorola... there was some turmoil in those days ;-) > > Both papers list Motorola affiliation, that is they were > Motorola paid-for projects. Check them out on DropBox. > https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0The first paper looks as if it might correspond to the LM4871 - which is not a number I ever ran into, and sounds a good deal later than 1968. The LM380 and LM384 seem to fit the bill better - the LM380 is credited with 2.5W on the data sheet, and the LM3284 was a selected part that could survive a higher supply voltage and was rated for 5W. http://www.ti.com/lit/ds/symlink/lm380.pdf The second part is a voltage regulator, and Bob Widlar managed to corner most of the glory there. -- Bill Sloman, Sydney
Reply by ●May 19, 20172017-05-19
bill.sloman@ieee.org wrote...> > Winfield Hill wrote: >> Jim Thompson wrote... >>> Winfield Hill wrote: >>>> Jim Thompson wrote... >>>>> Winfield Hill wrote: >>>>>> Jim Thompson wrote... >>>>>>> Lasse Langwadt Christensen wrote: >>>>>>>> Winfield Hill wrote: >>>>>>>>> bill.sloman@ieee.org wrote... >>>>>>>>>> >>>>>>>>>> But Jim can't name an integrated circuit he designed. ... >>>>>>>>> >>>>>>>>> I know he was a specialist in high-power IC design, >>>>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power >>>>>>>>> Series Voltage Regulator", and with James Solomon, >>>>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power >>>>>>>>> Amplifier"; both were probably Motorola parts. And >>>>>>>>> I have his paper on a Monolithic-Sonar-System. There >>>>>>>>> are likely many more papers if one were to look. He >>>>>>>>> also had patents, which I have stored in my computer. >>>>> >>>>> I'll browse the patents and can probably identify those >>>>> products that are Motorola's. >>>> >>>> I'm curious about the two Motorola papers I quoted. >>> >>> I'm not sure they are Motorola papers. By 1968, they both may >>> have left Motorola... there was some turmoil in those days ;-) >> >> Both papers list Motorola affiliation, that is they were >> Motorola paid-for projects. Check them out on DropBox. >> https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0 > >The first paper looks as if it might correspond to the LM4871 - which is not a >number I ever ran into, and sounds a good deal later than 1968. The LM380 and >LM384 seem to fit the bill better - the LM380 is credited with 2.5W on the data >sheet, and the LM3284 was a selected part that could survive a higher supply >voltage and was rated for 5W. > >http://www.ti.com/lit/ds/symlink/lm380.pdf > >The second part is a voltage regulator, and Bob Widlar managed to corner most of >the glory there.Ahem, both were Motorola designs rather than NSC. But I suppose it's possible neither were put into production. -- Thanks, - Win
Reply by ●May 19, 20172017-05-19
On 18 May 2017 19:39:50 -0700, Winfield Hill <hill@rowland.harvard.edu> wrote:>Jim Thompson wrote... >> >>On 18 May 2017 18:37:15 -0700, Winfield Hill >><hill@rowland.harvard.edu> wrote: >> >>>Jim Thompson wrote... >>>> >>>>Winfield Hill wrote: >>>>> Jim Thompson wrote... >>>>>> Lasse Langwadt Christensen wrote: >>>>>>> Winfield Hill wrote: >>>>>>>> bill.sloman@ieee.org wrote... >>>>>>>>> >>>>>>>>> But Jim can't name an integrated circuit he designed. ... >>>>>>>> >>>>>>>> I know he was a specialist in high-power IC design, >>>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power >>>>>>>> Series Voltage Regulator", and with James Solomon, >>>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power >>>>>>>> Amplifier"; both were probably Motorola parts. And >>>>>>>> I have his paper on a Monolithic-Sonar-System. There >>>>>>>> are likely many more papers if one were to look. He >>>>>>>> also had patents, which I have stored in my computer. >>>> >>>> I'll browse the patents and can probably identify those >>>> products that are Motorola's. >>> >>> I'm curious about the two Motorola papers I quoted. >> >> I'm not sure they are Motorola papers. By 1968, they both may >> have left Motorola... there was some turmoil in those days ;-) > > Both papers list Motorola affiliation, that is they were > Motorola paid-for projects. Check them out on DropBox. > https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0Paper "1968_Frederiksen,Solomon_amplifier.pdf" is MC1554... the output stage is my scheme... a sliding class-A version can be seen in the MC1530/31 OpAmps. Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 regulator. I am unaware of what Motorola might have called it, I was not involved with regulators at that point-in-time, just PLL's and A/D/A (and I might have been away at Philco-Ford doing automotive stuff :-). Note that Figure 6 is my current mirror scheme (not credited in standard Jim Solomon style). He was a cretin who got his ass publicly handed to him on a platter by writing a paper claiming he created the Gilbert multiplier. It'll take me a few days to got thru the patents (*), but US4607172 is an NSC comparator, part number unknown, should have be found to infringe my patent US3638041, MC1650/51 MECL Comparators. (*) I use Patent Fetcher which restricts me to 6 per 24 hour period without charge ;-) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
Reply by ●May 19, 20172017-05-19
On 05/19/2017 11:22 AM, Jim Thompson wrote:> On 18 May 2017 19:39:50 -0700, Winfield Hill > <hill@rowland.harvard.edu> wrote: > >> Jim Thompson wrote... >>> >>> On 18 May 2017 18:37:15 -0700, Winfield Hill >>> <hill@rowland.harvard.edu> wrote: >>> >>>> Jim Thompson wrote... >>>>> >>>>> Winfield Hill wrote: >>>>>> Jim Thompson wrote... >>>>>>> Lasse Langwadt Christensen wrote: >>>>>>>> Winfield Hill wrote: >>>>>>>>> bill.sloman@ieee.org wrote... >>>>>>>>>> >>>>>>>>>> But Jim can't name an integrated circuit he designed. ... >>>>>>>>> >>>>>>>>> I know he was a specialist in high-power IC design, >>>>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power >>>>>>>>> Series Voltage Regulator", and with James Solomon, >>>>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power >>>>>>>>> Amplifier"; both were probably Motorola parts. And >>>>>>>>> I have his paper on a Monolithic-Sonar-System. There >>>>>>>>> are likely many more papers if one were to look. He >>>>>>>>> also had patents, which I have stored in my computer. >>>>> >>>>> I'll browse the patents and can probably identify those >>>>> products that are Motorola's. >>>> >>>> I'm curious about the two Motorola papers I quoted. >>> >>> I'm not sure they are Motorola papers. By 1968, they both may >>> have left Motorola... there was some turmoil in those days ;-) >> >> Both papers list Motorola affiliation, that is they were >> Motorola paid-for projects. Check them out on DropBox. >> https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0 > > Paper "1968_Frederiksen,Solomon_amplifier.pdf" is MC1554... the output > stage is my scheme... a sliding class-A version can be seen in the > MC1530/31 OpAmps. > > Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 > regulator. I am unaware of what Motorola might have called it, I was > not involved with regulators at that point-in-time, just PLL's and > A/D/A (and I might have been away at Philco-Ford doing automotive > stuff :-). > > Note that Figure 6 is my current mirror scheme (not credited in > standard Jim Solomon style). He was a cretin who got his ass publicly > handed to him on a platter by writing a paper claiming he created the > Gilbert multiplier. > > It'll take me a few days to got thru the patents (*), but US4607172 is > an NSC comparator, part number unknown, should have be found to > infringe my patent US3638041, MC1650/51 MECL Comparators.When two patents cover the same invention it's called "interference", not "infringement".> (*) I use Patent Fetcher which restricts me to 6 per 24 hour period > without charge ;-)Google Patents is free. IIRC some of the PDFs aren't OCRed. Those ones, I usually fix using any2djvu: http://djvu.org/any2djvu/ I like the djvu format, and it's unlikely to be vulnerable to PDF nasties anyway. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Reply by ●May 19, 20172017-05-19
On Fri, 19 May 2017 11:29:03 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:>On 05/19/2017 11:22 AM, Jim Thompson wrote: >> On 18 May 2017 19:39:50 -0700, Winfield Hill >> <hill@rowland.harvard.edu> wrote: >> >>> Jim Thompson wrote... >>>> >>>> On 18 May 2017 18:37:15 -0700, Winfield Hill >>>> <hill@rowland.harvard.edu> wrote: >>>> >>>>> Jim Thompson wrote... >>>>>> >>>>>> Winfield Hill wrote: >>>>>>> Jim Thompson wrote... >>>>>>>> Lasse Langwadt Christensen wrote: >>>>>>>>> Winfield Hill wrote: >>>>>>>>>> bill.sloman@ieee.org wrote... >>>>>>>>>>> >>>>>>>>>>> But Jim can't name an integrated circuit he designed. ... >>>>>>>>>> >>>>>>>>>> I know he was a specialist in high-power IC design, >>>>>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power >>>>>>>>>> Series Voltage Regulator", and with James Solomon, >>>>>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power >>>>>>>>>> Amplifier"; both were probably Motorola parts. And >>>>>>>>>> I have his paper on a Monolithic-Sonar-System. There >>>>>>>>>> are likely many more papers if one were to look. He >>>>>>>>>> also had patents, which I have stored in my computer. >>>>>> >>>>>> I'll browse the patents and can probably identify those >>>>>> products that are Motorola's. >>>>> >>>>> I'm curious about the two Motorola papers I quoted. >>>> >>>> I'm not sure they are Motorola papers. By 1968, they both may >>>> have left Motorola... there was some turmoil in those days ;-) >>> >>> Both papers list Motorola affiliation, that is they were >>> Motorola paid-for projects. Check them out on DropBox. >>> https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0 >> >> Paper "1968_Frederiksen,Solomon_amplifier.pdf" is MC1554... the output >> stage is my scheme... a sliding class-A version can be seen in the >> MC1530/31 OpAmps. >> >> Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 >> regulator. I am unaware of what Motorola might have called it, I was >> not involved with regulators at that point-in-time, just PLL's and >> A/D/A (and I might have been away at Philco-Ford doing automotive >> stuff :-). >> >> Note that Figure 6 is my current mirror scheme (not credited in >> standard Jim Solomon style). He was a cretin who got his ass publicly >> handed to him on a platter by writing a paper claiming he created the >> Gilbert multiplier. >> >> It'll take me a few days to got thru the patents (*), but US4607172 is >> an NSC comparator, part number unknown, should have be found to >> infringe my patent US3638041, MC1650/51 MECL Comparators. > >When two patents cover the same invention it's called "interference", >not "infringement".The patent examiner should have caught it.> > >> (*) I use Patent Fetcher which restricts me to 6 per 24 hour period >> without charge ;-) > >Google Patents is free. IIRC some of the PDFs aren't OCRed. Those >ones, I usually fix using any2djvu: > >http://djvu.org/any2djvu/ > >I like the djvu format, and it's unlikely to be vulnerable to PDF >nasties anyway. > >Cheers > >Phil Hobbs...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
Reply by ●May 19, 20172017-05-19
On 05/19/2017 11:46 AM, Jim Thompson wrote:> On Fri, 19 May 2017 11:29:03 -0400, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > >> On 05/19/2017 11:22 AM, Jim Thompson wrote: >>> On 18 May 2017 19:39:50 -0700, Winfield Hill >>> <hill@rowland.harvard.edu> wrote: >>> >>>> Jim Thompson wrote... >>>>> >>>>> On 18 May 2017 18:37:15 -0700, Winfield Hill >>>>> <hill@rowland.harvard.edu> wrote: >>>>> >>>>>> Jim Thompson wrote... >>>>>>> >>>>>>> Winfield Hill wrote: >>>>>>>> Jim Thompson wrote... >>>>>>>>> Lasse Langwadt Christensen wrote: >>>>>>>>>> Winfield Hill wrote: >>>>>>>>>>> bill.sloman@ieee.org wrote... >>>>>>>>>>>> >>>>>>>>>>>> But Jim can't name an integrated circuit he designed. ... >>>>>>>>>>> >>>>>>>>>>> I know he was a specialist in high-power IC design, >>>>>>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power >>>>>>>>>>> Series Voltage Regulator", and with James Solomon, >>>>>>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power >>>>>>>>>>> Amplifier"; both were probably Motorola parts. And >>>>>>>>>>> I have his paper on a Monolithic-Sonar-System. There >>>>>>>>>>> are likely many more papers if one were to look. He >>>>>>>>>>> also had patents, which I have stored in my computer. >>>>>>> >>>>>>> I'll browse the patents and can probably identify those >>>>>>> products that are Motorola's. >>>>>> >>>>>> I'm curious about the two Motorola papers I quoted. >>>>> >>>>> I'm not sure they are Motorola papers. By 1968, they both may >>>>> have left Motorola... there was some turmoil in those days ;-) >>>> >>>> Both papers list Motorola affiliation, that is they were >>>> Motorola paid-for projects. Check them out on DropBox. >>>> https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0 >>> >>> Paper "1968_Frederiksen,Solomon_amplifier.pdf" is MC1554... the output >>> stage is my scheme... a sliding class-A version can be seen in the >>> MC1530/31 OpAmps. >>> >>> Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 >>> regulator. I am unaware of what Motorola might have called it, I was >>> not involved with regulators at that point-in-time, just PLL's and >>> A/D/A (and I might have been away at Philco-Ford doing automotive >>> stuff :-). >>> >>> Note that Figure 6 is my current mirror scheme (not credited in >>> standard Jim Solomon style). He was a cretin who got his ass publicly >>> handed to him on a platter by writing a paper claiming he created the >>> Gilbert multiplier. >>> >>> It'll take me a few days to got thru the patents (*), but US4607172 is >>> an NSC comparator, part number unknown, should have be found to >>> infringe my patent US3638041, MC1650/51 MECL Comparators. >> >> When two patents cover the same invention it's called "interference", >> not "infringement". > > The patent examiner should have caught it.Yup. They only have about 8 hours assigned to each application, though, and rely very heavily on keyword searches to find prior art. Garrett Moddel of U Colorado and I (IBM) have almost the exact same patent on waveguide-integrated tunnel junction optical modulators. If either of us had been able to make them work, it could have been an interesting fight. ;) It's possible to have the same invention described in quite different terms, so that a simple keyword search doesn't find the prior art. There's an appeals process in the USPTO that handles interferences and re-examinations. I've done a few re-exams--the rules are much more like the initial examination and much less like a district court case. The patent owner has to prove his case in a re-exam, whereas in court there's a strong presumption of the validity of an issued patent. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Reply by ●May 19, 20172017-05-19
On Fri, 19 May 2017 12:08:53 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:>On 05/19/2017 11:46 AM, Jim Thompson wrote: >> On Fri, 19 May 2017 11:29:03 -0400, Phil Hobbs >> <pcdhSpamMeSenseless@electrooptical.net> wrote: >> >>> On 05/19/2017 11:22 AM, Jim Thompson wrote: >>>> On 18 May 2017 19:39:50 -0700, Winfield Hill >>>> <hill@rowland.harvard.edu> wrote: >>>> >>>>> Jim Thompson wrote... >>>>>> >>>>>> On 18 May 2017 18:37:15 -0700, Winfield Hill >>>>>> <hill@rowland.harvard.edu> wrote: >>>>>> >>>>>>> Jim Thompson wrote... >>>>>>>> >>>>>>>> Winfield Hill wrote: >>>>>>>>> Jim Thompson wrote... >>>>>>>>>> Lasse Langwadt Christensen wrote: >>>>>>>>>>> Winfield Hill wrote: >>>>>>>>>>>> bill.sloman@ieee.org wrote... >>>>>>>>>>>>> >>>>>>>>>>>>> But Jim can't name an integrated circuit he designed. ... >>>>>>>>>>>> >>>>>>>>>>>> I know he was a specialist in high-power IC design, >>>>>>>>>>>> see his 1968 paper in JSSC, "A Monolithic High-Power >>>>>>>>>>>> Series Voltage Regulator", and with James Solomon, >>>>>>>>>>>> "A High-Performance 3-Watt Monolithic Class-B Power >>>>>>>>>>>> Amplifier"; both were probably Motorola parts. And >>>>>>>>>>>> I have his paper on a Monolithic-Sonar-System. There >>>>>>>>>>>> are likely many more papers if one were to look. He >>>>>>>>>>>> also had patents, which I have stored in my computer. >>>>>>>> >>>>>>>> I'll browse the patents and can probably identify those >>>>>>>> products that are Motorola's. >>>>>>> >>>>>>> I'm curious about the two Motorola papers I quoted. >>>>>> >>>>>> I'm not sure they are Motorola papers. By 1968, they both may >>>>>> have left Motorola... there was some turmoil in those days ;-) >>>>> >>>>> Both papers list Motorola affiliation, that is they were >>>>> Motorola paid-for projects. Check them out on DropBox. >>>>> https://www.dropbox.com/sh/t27kt0zjnxo8a3p/AABRbcodOSEzxyBUaikzic1ia?dl=0 >>>> >>>> Paper "1968_Frederiksen,Solomon_amplifier.pdf" is MC1554... the output >>>> stage is my scheme... a sliding class-A version can be seen in the >>>> MC1530/31 OpAmps. >>>> >>>> Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 >>>> regulator. I am unaware of what Motorola might have called it, I was >>>> not involved with regulators at that point-in-time, just PLL's and >>>> A/D/A (and I might have been away at Philco-Ford doing automotive >>>> stuff :-). >>>> >>>> Note that Figure 6 is my current mirror scheme (not credited in >>>> standard Jim Solomon style). He was a cretin who got his ass publicly >>>> handed to him on a platter by writing a paper claiming he created the >>>> Gilbert multiplier. >>>> >>>> It'll take me a few days to got thru the patents (*), but US4607172 is >>>> an NSC comparator, part number unknown, should have be found to >>>> infringe my patent US3638041, MC1650/51 MECL Comparators. >>> >>> When two patents cover the same invention it's called "interference", >>> not "infringement". >> >> The patent examiner should have caught it. > >Yup. They only have about 8 hours assigned to each application, though, >and rely very heavily on keyword searches to find prior art. > >Garrett Moddel of U Colorado and I (IBM) have almost the exact same >patent on waveguide-integrated tunnel junction optical modulators. If >either of us had been able to make them work, it could have been an >interesting fight. ;) > >It's possible to have the same invention described in quite different >terms, so that a simple keyword search doesn't find the prior art. > >There's an appeals process in the USPTO that handles interferences and >re-examinations. I've done a few re-exams--the rules are much more like >the initial examination and much less like a district court case. The >patent owner has to prove his case in a re-exam, whereas in court >there's a strong presumption of the validity of an issued patent. > >Cheers > >Phil HobbsMy 3,491,301 was initially denied. Then I told the examiner he was too dumb to understand it (I was only 25 at the time :-) The examiner allowed it ;-) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
Reply by ●May 19, 20172017-05-19
Jim Thompson wrote...> >Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 >regulator. I am unaware of what Motorola might have called it, I was >not involved with regulators at that point-in-time, just PLL's and >A/D/A (and I might have been away at Philco-Ford doing automotive >stuff :-). > >Note that Figure 6 is my current mirror scheme (not credited in >standard Jim Solomon style). He was a cretin who got his ass publicly >handed to him on a platter by writing a paper claiming he created the >Gilbert multiplier.You're talking about Figure 6 in the Frederiksen sole-author regulator paper (not the joint paper with Solomon), right? Tom credits you in a footnote: "This circuit was suggested by J. E. Thompson." Its purpose was to deal with very poor PNP beta? -- Thanks, - Win
Reply by ●May 19, 20172017-05-19
On 19 May 2017 09:46:18 -0700, Winfield Hill <hill@rowland.harvard.edu> wrote:>Jim Thompson wrote... >> >>Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 >>regulator. I am unaware of what Motorola might have called it, I was >>not involved with regulators at that point-in-time, just PLL's and >>A/D/A (and I might have been away at Philco-Ford doing automotive >>stuff :-). >> >>Note that Figure 6 is my current mirror scheme (not credited in >>standard Jim Solomon style). He was a cretin who got his ass publicly >>handed to him on a platter by writing a paper claiming he created the >>Gilbert multiplier. > > You're talking about Figure 6 in the Frederiksen > sole-author regulator paper (not the joint paper > with Solomon), right? Tom credits you in a footnote: > "This circuit was suggested by J. E. Thompson." > Its purpose was to deal with very poor PNP beta?Thanks, I missed that. Yes, it side-steps the poor lateral-PNP beta problem. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
