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From: bill.sloman on 29 Mar 2006 04:09 Jim Thompson wrote: > On Tue, 28 Mar 2006 19:01:03 -0600, John Fields > <jfields(a)austininstruments.com> wrote: > > >On Tue, 28 Mar 2006 16:08:01 -0700, Jim Thompson > ><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: > > > >>In some prior posts there have been inquiries regarding low distortion > >>oscillators. > >> > >>Out of curiosity I simulated a 200Hz oscillator made simply from an > >>A1A-style gyrator BP filter, then wrapped a positive feedback loop > >>around it, with back-to-back diodes used to limit the drive to the > >>input to the BP filter. > >> > >>Result: 3rd harmonic was at -58dB > > > >--- > >And the circuit file is where??? > > I'll post it in a few minutes. > > Just got back from the hospital where my youngest son (33 years old) > is being treated for colon cancer that has spread to lungs and liver > :-( Bummer. I'm of an age where too damn many of my friends are starting to die of cancer. The fact that it strikes pretty much at random is no comfort at all. -- Bill Sloman, Nijmegen
From: John Fields on 29 Mar 2006 06:25 On Tue, 28 Mar 2006 21:11:47 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >Just got back from the hospital where my youngest son (33 years old) >is being treated for colon cancer that has spread to lungs and liver >:-( --- Sorry, Jim. -- John Fields Professional Circuit Designer
From: Frank Bemelman on 29 Mar 2006 09:17 "Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> schreef in bericht news:o52k22lcndoulfp1m5orf7jgc3ttau2j1r(a)4ax.com... > On Tue, 28 Mar 2006 19:01:03 -0600, John Fields > <jfields(a)austininstruments.com> wrote: > > >On Tue, 28 Mar 2006 16:08:01 -0700, Jim Thompson > ><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: > > > >>In some prior posts there have been inquiries regarding low distortion > >>oscillators. > >> > >>Out of curiosity I simulated a 200Hz oscillator made simply from an > >>A1A-style gyrator BP filter, then wrapped a positive feedback loop > >>around it, with back-to-back diodes used to limit the drive to the > >>input to the BP filter. > >> > >>Result: 3rd harmonic was at -58dB > > > >--- > >And the circuit file is where??? > > I'll post it in a few minutes. > > Just got back from the hospital where my youngest son (33 years old) > is being treated for colon cancer that has spread to lungs and liver > :-( That is terrible. I hope his doctors are generously with painkillers. Today I returned from a 5-day trip to Cairo with my brother, who has lung cancer. A totally insane trip to see the Pyramids, but we did it. Spend time with your son, Jim. -- Thanks, Frank. (remove 'q' and '.invalid' when replying by email)
From: Jim Thompson on 29 Mar 2006 09:24 On Wed, 29 Mar 2006 16:17:14 +0200, "Frank Bemelman" <f.bemelmanq(a)xs4all.invalid.nl> wrote: >"Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> schreef in >bericht news:o52k22lcndoulfp1m5orf7jgc3ttau2j1r(a)4ax.com... >> On Tue, 28 Mar 2006 19:01:03 -0600, John Fields >> <jfields(a)austininstruments.com> wrote: >> >> >On Tue, 28 Mar 2006 16:08:01 -0700, Jim Thompson >> ><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >> > >> >>In some prior posts there have been inquiries regarding low distortion >> >>oscillators. >> >> >> >>Out of curiosity I simulated a 200Hz oscillator made simply from an >> >>A1A-style gyrator BP filter, then wrapped a positive feedback loop >> >>around it, with back-to-back diodes used to limit the drive to the >> >>input to the BP filter. >> >> >> >>Result: 3rd harmonic was at -58dB >> > >> >--- >> >And the circuit file is where??? >> >> I'll post it in a few minutes. >> >> Just got back from the hospital where my youngest son (33 years old) >> is being treated for colon cancer that has spread to lungs and liver >> :-( > >That is terrible. I hope his doctors are generously with painkillers. >Today I returned from a 5-day trip to Cairo with my brother, who has >lung cancer. A totally insane trip to see the Pyramids, but we did it. >Spend time with your son, Jim. Thanks to all of you for your comforting words! They put a STENT in Duane's colon and laser-ablated the tumor there. So they haven't cut into him yet. They're installing a "port" in his chest this morning for ease of doing the chemo. The doctors seem very upbeat, but I saw the pictures... doesn't look good to me :-( ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Michael A. Terrell on 29 Mar 2006 09:29
Jim Thompson wrote: > > Just got back from the hospital where my youngest son (33 years old) > is being treated for colon cancer that has spread to lungs and liver > :-( > > Jim Thompson I lost my mother to Colon cancer when she was 52. Its a nasty disease, but there have been some advancement in treatment in the last 20 years. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |