Great respect for the man !I returned to Italy from Seattle in the '84 with a clear idea: have a Byte subscription at home and read Chaos Manor.
RIP Jerry and put a LAN down there !
Search found 8 matches
- Tue Sep 12, 2017 5:19 pm
- Forum: The Peabody Lounge
- Topic: "The View from Chaos Manor" RIP Jerry Pournelle
- Replies: 2
- Views: 6336
- Sun Jul 30, 2017 3:10 am
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
Thank JR , yeah darlingtons are not nice guys, those are out of a sort of lazy behavior I have in counting" how many soldering I have to do today". Clearly developed when I was young, but hard habit to fight, so i still go for the lower part count the better. Anyway , the correct biasing i...
- Fri Jul 28, 2017 5:50 pm
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
"I have one example where the output devices are coupled to the driver by LED/Solar cells. I should scan it. I think it had a 1 kV range."
Mediatechnology
the 4N35 are fairly linear in some way and are deadly cheap
PL
- Fri Jul 28, 2017 5:43 pm
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
The evergreen Jim Williams always gives some useful tips: i've read almost anything from him and Pease too. What I have to learn from that article is to avoid my habit to use monolithic darlingtons, that narrows the range of devices available. What i don't like is to have emitter outputs: in case of...
- Fri Jul 28, 2017 10:12 am
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
That is exactly the configuration I use all the time: sometimes is good go through the PS lines, but in case of very fast amps is better to take the current out of the collectors of two followers PNP NPN connected at the output of the OPAMP so that you don't include in the path the idle current of t...
- Thu Jul 27, 2017 2:30 pm
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
well... what can I say if not "thank to this forum !" couple of days i'm in and you all went up with plenty of tricks. FYI the 20 mSec 100W amp was probably copied after you by a HiFi power amp on a magazine quite popular in the mid '80 in Italy: today there' plenty of caps' pumping for Cm...
- Thu Jul 27, 2017 9:54 am
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
Thank JR for the reply. I was referring to one of the designs that had a non inverting input and a usual opamp feedback configuration (with gain) That was misleading, as well as the first one, with a grounded positive input: clearly shifting the PS will do the job, but then everything is bootstrappe...
- Thu Jul 27, 2017 8:27 am
- Forum: Document
- Topic: Bootstrapped Op Amp Articles
- Replies: 34
- Views: 219876
Re: Bootstrapped Op Amp Articles
Dears I'm quite new on this forum, full with interesting stuff, however this "boosted opamp" series of articles are showing since the start an input positive node that can swing more than the absolute maximum rating vs the power supplies of the OPAMP itself , and you know this' no good. Th...