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Current Feedback Amplifiers, not only a semantic problem?
Current Feedback Amplifiers, not only a semantic problem?
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Old 23rd August 2017, 02:47 AM   #391
Wavebourn is offline Wavebourn  United States
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Current Feedback Amplifiers, not only a semantic problem?
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Originally Posted by scott wurcer View Post
A large part of our Russian community uses this market, lots of cute Russian girls on the staff. I visited again today to pick up things not available anywhere else. Baza Gourmet Food & Spirits - 69 Photos & 71 Reviews - Grocery - 30 Tower Rd, Newton Upper Falls, MA - Phone Number - Yelp
We have Babushka store in Walnut Creek. Food is great, but the owner and his son don't look interesting to me.

Babushka Russian Deli and Restaurant
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Old 23rd August 2017, 11:52 AM   #392
Bonsai is offline Bonsai  Europe
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Quote:
Originally Posted by MarcelvdG View Post
There are more than two ways to make an amplifier input stage; I'm getting curious how you would categorize the input stage (first inverter) of a three-inverter transimpedance amplifier (three CMOS inverters in a row with a feedback resistor from the last to the first and some frequency compensation). Assuming a fixed supply voltage, the input stage operates in class AB, but its input is as high impedant as it gets.
Marcel,

all that will happen is we will go around in circles. I think you know exactly what I mean. I am more interested in helping people who have a 'conceptual block' about CFA, or people who believe CFA=VFA or that CFA is a bad name because it does not fit with their understanding. I will never convince people that hate CFA (plenty here on the forum).

I am going to step out of this discussion. Wavebourn is right.
Talking about Russian girls, drinking Vodka and in my case listening to Tchaikovsky is time better spent.
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Old 23rd August 2017, 12:12 PM   #393
Ketje is offline Ketje  Belgium
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Quote:
Originally Posted by Bonsai View Post
people who have a 'conceptual block' about CFA, or people who believe CFA=VFA
There are even people who believe CFA=CFA
Will the real CFA stand-up ?
Mona
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Old 23rd August 2017, 03:56 PM   #394
WaltJ is offline WaltJ  United States
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Default Sergio Franco's new CFA article on the EDN website

Here is a link to Professor Sergio Franco's new CFA article on EDN website

Walt Jung
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Old 23rd August 2017, 05:12 PM   #395
RNMarsh is offline RNMarsh  United States
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thank you walt. I have said same thing from other sources.... excerpts from books in fact but no one here wants to read them. I have said similar to last paragraph re low internal impedances. Just argue about something they don't know much about. So, I'm with Bonsai on this. Cheers.

THx-RNMarsh

Last edited by RNMarsh; 23rd August 2017 at 05:17 PM.
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Old 23rd August 2017, 05:14 PM   #396
Bonsai is offline Bonsai  Europe
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Old 23rd August 2017, 05:40 PM   #397
MiiB is offline MiiB  Denmark
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I believe the the difference between VFA and CFA is down to passive or active V to I conversion CFA over a resistor pair VFA over bjt or jfet devices. Circuits like the old (relative) Hiraga Class A fits the CFA. Some may argue tha voltage out also implies voltage feeedback. But I believe we need to accept that CFA is a circuit concept rather than a current to current feedback
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Old 23rd August 2017, 06:11 PM   #398
Ketje is offline Ketje  Belgium
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The wrongly named CFB is PVF !
Mona
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Old 23rd August 2017, 06:33 PM   #399
scott wurcer is offline scott wurcer  United States
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Quote:
Originally Posted by RNMarsh View Post
Just argue about something they don't know much about.
That's for sure.
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Old 23rd August 2017, 06:35 PM   #400
Wavebourn is offline Wavebourn  United States
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Current Feedback Amplifiers, not only a semantic problem?
Quote:
Originally Posted by Ketje View Post
The wrongly named CFB is PVF !
Mona
No boobs on your picture. It does not count.
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