John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:> On Sun, 06 Nov 2011 20:39:36 GMT, Mike <spam@me.not> wrote:>>Why on earth would you say the following? >> >>> And if it does a little, so what? > > I guess it depends on how close to 100% selfish you can get. > > JohnNah. I was just interested to find out if you knew the trick, or if there was something else you were hiding. From your response, it is clear you do not, and you obviously do not care how much damage you could cause. Is that not being selfish? So it will stay that way. Mike
isolated DC/DC converter
Started by ●November 3, 2011
Reply by ●November 6, 20112011-11-06
Reply by ●November 6, 20112011-11-06
On Sun, 06 Nov 2011 11:55:36 -0800, John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:>On Sun, 06 Nov 2011 19:43:04 GMT, Mike <spam@me.not> wrote: > > >>There are some other simple PCB tricks than can be very effective, but >>they are proprietary and I can't divulge them at the current time. > >Lots of people say stuff like that. Makes no sense to me: how is >sharing stuff like that going to hurt you? And if it does a little, so >what?What gets me is why is someone who is so afraid of divulging such proprietary information, talking about it at all?
Reply by ●November 6, 20112011-11-06
On Sun, 06 Nov 2011 23:17:57 GMT, Mike <spam@me.not> wrote:>John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >> On Sun, 06 Nov 2011 20:39:36 GMT, Mike <spam@me.not> wrote: > >>>Why on earth would you say the following? >>> >>>> And if it does a little, so what? >> >> I guess it depends on how close to 100% selfish you can get. >> >> John > >Nah. I was just interested to find out if you knew the trick, or if there >was something else you were hiding. From your response, it is clear you do >not, and you obviously do not care how much damage you could cause. Is that >not being selfish? > >So it will stay that way. > >Mike > >Anyone who trusts a Larkin "design" is more than a wee-bit the fool. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 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.
Reply by ●November 6, 20112011-11-06
On Sun, 06 Nov 2011 23:17:57 GMT, Mike <spam@me.not> wrote:>John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >> On Sun, 06 Nov 2011 20:39:36 GMT, Mike <spam@me.not> wrote: > >>>Why on earth would you say the following? >>> >>>> And if it does a little, so what? >> >> I guess it depends on how close to 100% selfish you can get. >> >> John > >Nah. I was just interested to find out if you knew the trick, or if there >was something else you were hiding. From your response, it is clear you do >not, and you obviously do not care how much damage you could cause. Is that >not being selfish? > >So it will stay that way. > >Mike > >100%! John
Reply by ●November 6, 20112011-11-06
On Sun, 06 Nov 2011 16:42:38 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Sun, 06 Nov 2011 23:17:57 GMT, Mike <spam@me.not> wrote: > >>John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >> >>> On Sun, 06 Nov 2011 20:39:36 GMT, Mike <spam@me.not> wrote: >> >>>>Why on earth would you say the following? >>>> >>>>> And if it does a little, so what? >>> >>> I guess it depends on how close to 100% selfish you can get. >>> >>> John >> >>Nah. I was just interested to find out if you knew the trick, or if there >>was something else you were hiding. From your response, it is clear you do >>not, and you obviously do not care how much damage you could cause. Is that >>not being selfish? >> >>So it will stay that way. >> >>Mike >> >> > >Anyone who trusts a Larkin "design" is more than a wee-bit the fool. > > ...Jim Thompsonhttp://www.highlandtechnology.com/company/customers.shtml http://www.highlandtechnology.com/company/testimonials.shtml John
Reply by ●November 6, 20112011-11-06
On Sun, 06 Nov 2011 17:17:40 -0600, "krw@att.bizzzzzzzzzzzz" <krw@att.bizzzzzzzzzzzz> wrote:>On Sun, 06 Nov 2011 11:55:36 -0800, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sun, 06 Nov 2011 19:43:04 GMT, Mike <spam@me.not> wrote: >> >> >>>There are some other simple PCB tricks than can be very effective, but >>>they are proprietary and I can't divulge them at the current time. >> >>Lots of people say stuff like that. Makes no sense to me: how is >>sharing stuff like that going to hurt you? And if it does a little, so >>what? > >What gets me is why is someone who is so afraid of divulging such proprietary >information, talking about it at all?He has accused me of not knowing the tricks, but won't reveal the tricks. So how can he say I don't know it? And if it's so proprietary, why is he encouraging me to reveal it if I know it? Makes no sense. It's probably common and trivial, as most supposedly proprietary tricks are. John
Reply by ●November 6, 20112011-11-06
On Sun, 06 Nov 2011 20:14:30 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote:>On a sunny day (Sun, 06 Nov 2011 09:43:21 -0800) it happened John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in ><cvadb79e2hqa79n8crrt7j8t4cj5vsf127@4ax.com>: > >>OK, but a class-C resonant converter has to circulate a lot of energy >>in the L-C tank, high currents into custom magnetics. Sloshing all >>that energy around doesn't seem, to me, to have any real advantage. >> >>I do recall some of the Tek 7000-series scopes having a >>single-transistor class C resonant main power supply, off the >>rectified AC line. >> >>We should establish a PayPal fund to buy you some nice gridded vellum >>and an electric pencil sharpener. >> >>John > >Somebody I know bought a rather expensive digitiser pad. >If I had one that worked in Linux maybe that would be nice to make quick=sketches.>There is also something in the opera browser that allows one to share =sketches live,>tried it some years ago, but even on an extremely fast link >it was very slow. >Maybe I should check ebay.Actually most Wacoms (and their not rebaged knock offs) work pretty well. You could try one, taint expensive now. I have one and it works fine in linux. ?-)
Reply by ●November 7, 20112011-11-07
Mike <spam@me.not> writes:> John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >> On Sun, 06 Nov 2011 20:39:36 GMT, Mike <spam@me.not> wrote: > >>>Why on earth would you say the following? >>> >>>> And if it does a little, so what? >> >> I guess it depends on how close to 100% selfish you can get. >> >> John > > Nah. I was just interested to find out if you knew the trick, or if there > was something else you were hiding. From your response, it is clear you do > not, and you obviously do not care how much damage you could cause. Is that > not being selfish? > > So it will stay that way.Surely there are lots of "tricks" you can use (to reduce the effect of noise from a SMPS). How are we to know which particular one you are talking about? Limiting transition speeds. Use a shielded inductor. Minimise area of high dI/dt loops. Cascaded ferrite beads/low R + chip ceramic filter sections. Physical separation. In general I find high switching frequencies much easier to filter than low frequency ones. So say using a 500khz rather than 100khz regulator makes things easier. (This was for relatively low frequency "victim" circuits, so YMMV here). Less obvious ideas - put SMPS on opposite side of a board to everything else, with a groundplane layer in between. Try injecting an opposite polarity signal to the interfering one. Hmm, doesn't sound very practical.. Dither the switching frequency (already mentioned here). -- John Devereux
Reply by ●November 7, 20112011-11-07
Jimmy Jimpson wrote:>On Sun, 06 Nov 2011 21:24:40 GMT, Mike <spam@me.not> wrote: > >>Mike <spam@me.not> wrote: >> >>> You also use the same thing, John. >> >>> Mike >> >>Here's a recent example. Not even proprietary: >> >> Subject: Re: Fast power LED driving >> Date: Sat, 20 Aug 2011 05:38:35 -0700 >> From: John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> >> Newsgroups: sci.electronics.design >> Xref: z sci.electronics.design:846558 >> >> [...] >> >> I have a cute and cheap way to drive mosfet gates really fast and >> hard. I'd post it publically, but Thompson would steal it... >> >> [...] >> >> John >> >>There are many others. >> >>Mike >> > >And why would I "steal" it? More likely that I'd note that Larkin >infringes one of my patents or those of my clients.And don't forget to patent 'making republican babies'. May make you so rich you can finally hire somebody to fix your home appliances. :-)
Reply by ●November 7, 20112011-11-07
On Mon, 07 Nov 2011 09:49:04 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote:>Jimmy Jimpson wrote: > > >>On Sun, 06 Nov 2011 21:24:40 GMT, Mike <spam@me.not> wrote: >> >>>Mike <spam@me.not> wrote: >>> >>>> You also use the same thing, John. >>> >>>> Mike >>> >>>Here's a recent example. Not even proprietary: >>> >>> Subject: Re: Fast power LED driving >>> Date: Sat, 20 Aug 2011 05:38:35 -0700 >>> From: John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> >>> Newsgroups: sci.electronics.design >>> Xref: z sci.electronics.design:846558 >>> >>> [...] >>> >>> I have a cute and cheap way to drive mosfet gates really fast and >>> hard. I'd post it publically, but Thompson would steal it... >>> >>> [...] >>> >>> John >>> >>>There are many others. >>> >>>Mike >>> >> >>And why would I "steal" it? More likely that I'd note that Larkin >>infringes one of my patents or those of my clients. > >And don't forget to patent 'making republican babies'. >May make you so rich you can finally hire somebody >to fix your home appliances. >:-)And a decorator. He should hire a decorator. John
