On Fri, 04 Apr 2014 22:05:23 -0700, John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:>On Fri, 04 Apr 2014 21:17:44 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Fri, 04 Apr 2014 19:37:14 -0700, John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >> >>>On Fri, 04 Apr 2014 18:58:21 -0700, Jim Thompson >>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>> >>>>On Fri, 04 Apr 2014 18:27:07 -0700, John Larkin >>>><jlarkin@highlandtechnology.com> wrote: >>>> >>>>>On Fri, 04 Apr 2014 16:10:20 -0700, Jim Thompson >>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>> >>>>>>On Fri, 04 Apr 2014 14:55:05 -0700, John Larkin >>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>> >>>>>>>On Fri, 04 Apr 2014 13:59:35 -0700, Jim Thompson >>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>> >>>>>>>>On Fri, 04 Apr 2014 13:49:38 -0700, Jim Thompson >>>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>>> >>>>>>>>>On Fri, 4 Apr 2014 13:03:58 -0700 (PDT), wanderer@dialup4less.com >>>>>>>>>wrote: >>>>>>>>> >>>>>>>>>>I was going to try to load the TI TPS54335 spice model into LTspice but it looks encrypted. Is TI encrypting its spice models now? >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>http://www.ti.com/product/tps54335 >>>>>>>>>> >>>>>>>>>>Thanks >>>>>>>>> >>>>>>>>>Yep. Looks like TI is following LT's lead... models that will only >>>>>>>>>run on TINA. >>>>>>>>> >>>>>>>>>The posted PSpice model... while I've not yet tried it, looks like it >>>>>>>>>only will do a Bode plot. I'll let you know. >>>>>>>>> >>>>>>>>> ...Jim Thompson >>>>>>>> >>>>>>>>Yep, only Bode. TI will have its way with you >:-} >>>>>>>> >>>>>>>>I just did a model for the TI LM94022 (no model released by TI), based >>>>>>>>entirely on the datasheet, which is in beta testing. I'll post as >>>>>>>>soon as it is blessed. >>>>>>>> >>>>>>>>Perhaps I'll try the TPS54335, time permitting. The system modeling >>>>>>>>that the LM94022 goes into is a paying project, so it will dominate my >>>>>>>>time ;-) >>>>>>>> >>>>>>>> ...Jim Thompson >>>>>>> >>>>>>>Damn, another bizarre National temperature sensor. I wonder why the >>>>>>>slope is negative. >>>>>>> >>>>>>>I like the specification... >>>>>>> >>>>>>>SYM PARAMETER TYPICAL >>>>>>>CL Output Load Capacitance 1100 pF (max) >>>>>>> >>>>>>>So, that's a typical max? >>>>>>> >>>>>>>The data sheet is similarly funny in other places. Figs 9, 16, 17, and >>>>>>>18 are hoots. >>>>>>> >>>>>>>The LM35/45 series was a similar horror, with a nasty output stage, >>>>>>>oscillation and latchup problems. Bob Pease promised me that he'd fix >>>>>>>it, but he didn't get around to it. >>>>>> >>>>>>You just need to read thru it thoroughly, actually the effects of the >>>>>>Cload values are easy to decipher. >>>>> >>>>>I especially enjoyed the first-page claim about how it can drive an >>>>>ADC s/h circuit, and fig 18, which shows that it can't. >>>>> >>>>>Why didn't they make it c-load stable? >>>> >>>>Ask National/TI. I didn't design it, I just modeled it. >>>> >>>>That you can't decipher some of the data (because you're CMOS >>>>illiterate) is your problem, not mine. >>>> >>>> ...Jim Thompson >>> >>>I can read the data sheet. The PSRR, about 4 dB at 30 KHz, seems to be one of >>>those CMOS virtues that you are so fond of. >>> >>>Are you sure you didn't design this one? >> >>Your ignorance and assholiness proceeds you >:-} >> >> ...Jim Thompson > >You sputter when you can't think of any other noise to make. > >Thing about CMOS is its terrible ratio of capacitance to transconductance. I've >seen CMOS opamps that have PSRR *gain*.You know not of what you speak, yet you shout like a leftist to be heard above the true facts. Where'd you get that birdbrain idea the CMOS has a "...terrible ratio of capacitance to transconductance"? It doesn't. Most modern CMOS processes will do analog quite in excess of 500MHz without breaking a sweat. Citing someone's crap product as a measure of all CMOS simply displays your fundamental ignorance of the subject... but that will not keep you from being loud >:-} ...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.
Are TI Pspice models encripted?
Started by ●April 4, 2014
Reply by ●April 5, 20142014-04-05
Reply by ●April 5, 20142014-04-05
On Sat, 05 Apr 2014 08:05:18 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Fri, 04 Apr 2014 22:05:23 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Fri, 04 Apr 2014 21:17:44 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Fri, 04 Apr 2014 19:37:14 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Fri, 04 Apr 2014 18:58:21 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>>>On Fri, 04 Apr 2014 18:27:07 -0700, John Larkin >>>>><jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>>On Fri, 04 Apr 2014 16:10:20 -0700, Jim Thompson >>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>> >>>>>>>On Fri, 04 Apr 2014 14:55:05 -0700, John Larkin >>>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>>> >>>>>>>>On Fri, 04 Apr 2014 13:59:35 -0700, Jim Thompson >>>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>>> >>>>>>>>>On Fri, 04 Apr 2014 13:49:38 -0700, Jim Thompson >>>>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>>>> >>>>>>>>>>On Fri, 4 Apr 2014 13:03:58 -0700 (PDT), wanderer@dialup4less.com >>>>>>>>>>wrote: >>>>>>>>>> >>>>>>>>>>>I was going to try to load the TI TPS54335 spice model into LTspice but it looks encrypted. Is TI encrypting its spice models now? >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>>http://www.ti.com/product/tps54335 >>>>>>>>>>> >>>>>>>>>>>Thanks >>>>>>>>>> >>>>>>>>>>Yep. Looks like TI is following LT's lead... models that will only >>>>>>>>>>run on TINA. >>>>>>>>>> >>>>>>>>>>The posted PSpice model... while I've not yet tried it, looks like it >>>>>>>>>>only will do a Bode plot. I'll let you know. >>>>>>>>>> >>>>>>>>>> ...Jim Thompson >>>>>>>>> >>>>>>>>>Yep, only Bode. TI will have its way with you >:-} >>>>>>>>> >>>>>>>>>I just did a model for the TI LM94022 (no model released by TI), based >>>>>>>>>entirely on the datasheet, which is in beta testing. I'll post as >>>>>>>>>soon as it is blessed. >>>>>>>>> >>>>>>>>>Perhaps I'll try the TPS54335, time permitting. The system modeling >>>>>>>>>that the LM94022 goes into is a paying project, so it will dominate my >>>>>>>>>time ;-) >>>>>>>>> >>>>>>>>> ...Jim Thompson >>>>>>>> >>>>>>>>Damn, another bizarre National temperature sensor. I wonder why the >>>>>>>>slope is negative. >>>>>>>> >>>>>>>>I like the specification... >>>>>>>> >>>>>>>>SYM PARAMETER TYPICAL >>>>>>>>CL Output Load Capacitance 1100 pF (max) >>>>>>>> >>>>>>>>So, that's a typical max? >>>>>>>> >>>>>>>>The data sheet is similarly funny in other places. Figs 9, 16, 17, and >>>>>>>>18 are hoots. >>>>>>>> >>>>>>>>The LM35/45 series was a similar horror, with a nasty output stage, >>>>>>>>oscillation and latchup problems. Bob Pease promised me that he'd fix >>>>>>>>it, but he didn't get around to it. >>>>>>> >>>>>>>You just need to read thru it thoroughly, actually the effects of the >>>>>>>Cload values are easy to decipher. >>>>>> >>>>>>I especially enjoyed the first-page claim about how it can drive an >>>>>>ADC s/h circuit, and fig 18, which shows that it can't. >>>>>> >>>>>>Why didn't they make it c-load stable? >>>>> >>>>>Ask National/TI. I didn't design it, I just modeled it. >>>>> >>>>>That you can't decipher some of the data (because you're CMOS >>>>>illiterate) is your problem, not mine. >>>>> >>>>> ...Jim Thompson >>>> >>>>I can read the data sheet. The PSRR, about 4 dB at 30 KHz, seems to be one of >>>>those CMOS virtues that you are so fond of. >>>> >>>>Are you sure you didn't design this one? >>> >>>Your ignorance and assholiness proceeds you >:-} >>> >>> ...Jim Thompson >> >>You sputter when you can't think of any other noise to make. >> >>Thing about CMOS is its terrible ratio of capacitance to transconductance. I've >>seen CMOS opamps that have PSRR *gain*. > >You know not of what you speak, yet you shout like a leftist to be >heard above the true facts. > >Where'd you get that birdbrain idea the CMOS has a "...terrible ratio >of capacitance to transconductance"? It doesn't. Most modern CMOS >processes will do analog quite in excess of 500MHz without breaking a >sweat. >That's slow in our business. We use opamps that have GBW up to 18 GHz and MMICS way past that. CMOS is a cheap workhorse but it's slow and noisy and low voltage and not very precise. And CMOS parts, in my experience, tend to be buggier than bipolar parts. Must be a different class of designers. The only really notable CMOS parts are chopamps and a few fA bias current amps. Wanna stop babbling and actually compare some opamps, bipolar vs CMOS? Start with something medium-fast, like AD8009 or THS3201, nice parts. Got a CMOS equivalent? We could also compare low-noise, or high current, or low Ib opamps. Game? -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation
Reply by ●April 5, 20142014-04-05
On Sat, 05 Apr 2014 09:28:06 -0700, John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:>On Sat, 05 Apr 2014 08:05:18 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Fri, 04 Apr 2014 22:05:23 -0700, John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>[snip]>>> >>>Thing about CMOS is its terrible ratio of capacitance to transconductance. I've >>>seen CMOS opamps that have PSRR *gain*. >> >>You know not of what you speak, yet you shout like a leftist to be >>heard above the true facts. >> >>Where'd you get that birdbrain idea the CMOS has a "...terrible ratio >>of capacitance to transconductance"? It doesn't. Most modern CMOS >>processes will do analog quite in excess of 500MHz without breaking a >>sweat. >> > >That's slow in our business. We use opamps that have GBW up to 18 GHz and MMICS >way past that. CMOS is a cheap workhorse but it's slow and noisy and low voltage >and not very precise. And CMOS parts, in my experience, tend to be buggier than >bipolar parts. Must be a different class of designers. The only really notable >CMOS parts are chopamps and a few fA bias current amps. > >Wanna stop babbling and actually compare some opamps, bipolar vs CMOS? > >Start with something medium-fast, like AD8009 or THS3201, nice parts. Got a CMOS >equivalent? > >We could also compare low-noise, or high current, or low Ib opamps. Game?This thread is about Spice modeling. What are you babbling about? Trying to make me responsible for _your_ ignorance? ...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.
Reply by ●April 5, 20142014-04-05
On Sat, 05 Apr 2014 13:47:05 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Sat, 05 Apr 2014 09:28:06 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 05 Apr 2014 08:05:18 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Fri, 04 Apr 2014 22:05:23 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >[snip] >>>> >>>>Thing about CMOS is its terrible ratio of capacitance to transconductance. I've >>>>seen CMOS opamps that have PSRR *gain*. >>> >>>You know not of what you speak, yet you shout like a leftist to be >>>heard above the true facts. >>> >>>Where'd you get that birdbrain idea the CMOS has a "...terrible ratio >>>of capacitance to transconductance"? It doesn't. Most modern CMOS >>>processes will do analog quite in excess of 500MHz without breaking a >>>sweat. >>> >> >>That's slow in our business. We use opamps that have GBW up to 18 GHz and MMICS >>way past that. CMOS is a cheap workhorse but it's slow and noisy and low voltage >>and not very precise. And CMOS parts, in my experience, tend to be buggier than >>bipolar parts. Must be a different class of designers. The only really notable >>CMOS parts are chopamps and a few fA bias current amps. >> >>Wanna stop babbling and actually compare some opamps, bipolar vs CMOS? >> >>Start with something medium-fast, like AD8009 or THS3201, nice parts. Got a CMOS >>equivalent? >> >>We could also compare low-noise, or high current, or low Ib opamps. Game? > >This thread is about Spice modeling.You made it about how fast analog CMOS is. What are you babbling about?>Trying to make me responsible for _your_ ignorance?I want to name and compare actual parts, and you don't. Who's ignorant here?> > ...Jim ThompsonI guess that old hens are always still chickens. -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●April 5, 20142014-04-05
On Sat, 05 Apr 2014 14:49:43 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:
[snip]
Who uttered their profound statement of ignorance, "Thing about CMOS
is its terrible ratio of capacitance to transconductance. I've
seen CMOS opamps that have PSRR *gain*." ???
Anyone with half a clue knows that PSRR is referred to input for a
reason... to hide the fact that there is always a frequency point
above which ALL OpAmps have gain from supplies to output... bipolar's
included.
I was designing bipolar integrated circuits while you were still in
diapers. Sometimes I think you still are.
...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.
Reply by ●April 5, 20142014-04-05
On Sat, 05 Apr 2014 15:28:05 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Sat, 05 Apr 2014 14:49:43 -0700, John Larkin ><jlarkin@highlandtechnology.com> wrote: > >[snip] > >Who uttered their profound statement of ignorance, "Thing about CMOS >is its terrible ratio of capacitance to transconductance. I've >seen CMOS opamps that have PSRR *gain*." ??? > >Anyone with half a clue knows that PSRR is referred to input for a >reason... to hide the fact that there is always a frequency point >above which ALL OpAmps have gain from supplies to output... bipolar's >included. > >I was designing bipolar integrated circuits while you were still in >diapers. Sometimes I think you still are. > > ...Jim ThompsonYou're still chicken, and still wrong. If you dispute the gain:capacitance disadvantage of CMOS amps, name a CMOS opamp that's as fast as a bipolar THS3201. Or has the speed and input capacitance of a jfet ADA4817. Or comes anywhere near the specs of an AD8034. Come on, try it. -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●April 5, 20142014-04-05
On Fri, 04 Apr 2014 13:59:35 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Fri, 04 Apr 2014 13:49:38 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Fri, 4 Apr 2014 13:03:58 -0700 (PDT), wanderer@dialup4less.com >>wrote: >> >>>I was going to try to load the TI TPS54335 spice model into LTspice but it looks encrypted. Is TI encrypting its spice models now? >>> >>> >>>http://www.ti.com/product/tps54335 >>> >>>Thanks >> >>Yep. Looks like TI is following LT's lead... models that will only >>run on TINA. >> >>The posted PSpice model... while I've not yet tried it, looks like it >>only will do a Bode plot. I'll let you know. >> >> ...Jim Thompson > >Yep, only Bode. TI will have its way with you >:-} > >I just did a model for the TI LM94022 (no model released by TI), based >entirely on the datasheet, which is in beta testing. I'll post as >soon as it is blessed. > >Perhaps I'll try the TPS54335, time permitting. The system modeling >that the LM94022 goes into is a paying project, so it will dominate my >time ;-) > > ...Jim ThompsonAny questions/comments about the original topic, please post a response to this re-thread. ...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.
Reply by ●April 6, 20142014-04-06
On Sat, 05 Apr 2014 15:48:29 -0700, John Larkin <jlarkin@highlandtechnology.com> wrote:>On Sat, 05 Apr 2014 15:28:05 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Sat, 05 Apr 2014 14:49:43 -0700, John Larkin >><jlarkin@highlandtechnology.com> wrote: >> >>[snip] >> >>Who uttered their profound statement of ignorance, "Thing about CMOS >>is its terrible ratio of capacitance to transconductance. I've >>seen CMOS opamps that have PSRR *gain*." ??? >> >>Anyone with half a clue knows that PSRR is referred to input for a >>reason... to hide the fact that there is always a frequency point >>above which ALL OpAmps have gain from supplies to output... bipolar's >>included. >> >>I was designing bipolar integrated circuits while you were still in >>diapers. Sometimes I think you still are. >> >> ...Jim Thompson > >You're still chicken, and still wrong. > >If you dispute the gain:capacitance disadvantage of CMOS amps, name a >CMOS opamp that's as fast as a bipolar THS3201. Or has the speed and >input capacitance of a jfet ADA4817. Or comes anywhere near the specs >of an AD8034. > >Come on, try it.
Reply by ●April 6, 20142014-04-06
On Sat, 05 Apr 2014 17:09:01 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Fri, 04 Apr 2014 13:59:35 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Fri, 04 Apr 2014 13:49:38 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Fri, 4 Apr 2014 13:03:58 -0700 (PDT), wanderer@dialup4less.com >>>wrote: >>> >>>>I was going to try to load the TI TPS54335 spice model into LTspice but it looks encrypted. Is TI encrypting its spice models now? >>>> >>>> >>>>http://www.ti.com/product/tps54335 >>>> >>>>Thanks>>> >>>Yep. Looks like TI is following LT's lead... models that will only >>>run on TINA. >>> >>>The posted PSpice model... while I've not yet tried it, looks like it >>>only will do a Bode plot. I'll let you know. >>> >>> ...Jim Thompson >> >>Yep, only Bode. TI will have its way with you >:-} >> >>I just did a model for the TI LM94022 (no model released by TI), based >>entirely on the datasheet, which is in beta testing. I'll post as >>soon as it is blessed. >> >>Perhaps I'll try the TPS54335, time permitting. The system modeling >>that the LM94022 goes into is a paying project, so it will dominate my >>time ;-) >> >> ...Jim Thompson > >Any questions/comments about the original topic, please post a >response to this re-thread. > > ...Jim ThompsonTesting ...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.
Reply by ●April 6, 20142014-04-06
On Sun, 06 Apr 2014 08:42:04 -0500, John Fields <jfields@austininstruments.com> wrote:>On Sat, 05 Apr 2014 15:48:29 -0700, John Larkin ><jlarkin@highlandtechnology.com> wrote: > >>On Sat, 05 Apr 2014 15:28:05 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Sat, 05 Apr 2014 14:49:43 -0700, John Larkin >>><jlarkin@highlandtechnology.com> wrote: >>> >>>[snip] >>> >>>Who uttered their profound statement of ignorance, "Thing about CMOS >>>is its terrible ratio of capacitance to transconductance. I've >>>seen CMOS opamps that have PSRR *gain*." ??? >>> >>>Anyone with half a clue knows that PSRR is referred to input for a >>>reason... to hide the fact that there is always a frequency point >>>above which ALL OpAmps have gain from supplies to output... bipolar's >>>included. >>> >>>I was designing bipolar integrated circuits while you were still in >>>diapers. Sometimes I think you still are. >>> >>> ...Jim Thompson >> >>You're still chicken, and still wrong. >> >>If you dispute the gain:capacitance disadvantage of CMOS amps, name a >>CMOS opamp that's as fast as a bipolar THS3201. Or has the speed and >>input capacitance of a jfet ADA4817. Or comes anywhere near the specs >>of an AD8034. >> >>Come on, try it.Thanks for the insight. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation
