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Old 1st March 2006, 02:09 PM   #401
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I am trying to keep out of the flame war.
The problem in this thread is semantics.
Running an error amplifier with current input instead of voltage is perfectly valid. National used to make the LM3900, a strange opamp with a Norton current mirror input.
I would still say that the feedback is voltage from the output but if you want to call it cfb that is up to you.

I used to work on high voltage line output transistor drivers and there the drive circuit was essentially current.
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Old 1st March 2006, 06:31 PM   #402
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Quote:
Originally posted by davidsrsb
Too me the so called cfb is actually vfb. You are still sampling the output voltage.
100% correct!!!!

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Old 1st March 2006, 07:00 PM   #403
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Yesterday forr attached a nice moving coil preamp schematic, which looked to me as a basic current conveyor application.
Or should I have called it 'voltage conveyor'?
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Old 1st March 2006, 11:04 PM   #404
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Quote:
Originally posted by darkfenriz
Yesterday forr attached a nice moving coil preamp schematic....
Where?
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Old 1st March 2006, 11:15 PM   #405
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Old 1st March 2006, 11:25 PM   #406
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davidsrsb -
This thread brings back memories of the Wireless World letters pages 30 years ago.
Is a transistor a voltage or current amplifier was a hot topic back then as was the Quad 405 current dumper feedforward/back debate.

Nothing changes.

By the way, notice that the LM3886 chip amp has emitter follower inputs to buffer the inputs from the Miller capacitance of the LTP.
-------------------------------------------------------------------------
transistor is current and voltage amp so is all other devices

kind regards
ps=am i correct?
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Old 1st March 2006, 11:40 PM   #407
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mikeks -

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Post #402
quote:
Originally posted by davidsrsb
Too me the so called cfb is actually vfb. You are still sampling the output voltage.

100% correct!!!!
-------------------------------------------
mikeks youre not making yourself understood here i want you to
know that i wasnt born to view posts that say nothing

if you are a scientific person coming from england and knowing
the diffrence of the topic of this thread you should give us the
low down as to why you say what you say by 100% correct

i know english have a nut for explaining things now are you
going to explain to me why you are 100% sure

please correct me if iam wrong but i also agree with you

cheers mate thanks
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Old 1st March 2006, 11:46 PM   #408
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Quote:
Originally posted by mastertech
transistor is current and voltage amp so is all other devices..........correct?
http://www.diyaudio.com/forums/showt...824#post423824
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Old 1st March 2006, 11:47 PM   #409
mikeks is offline mikeks  United Kingdom
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Quote:
Originally posted by mastertech
i know english have a nut for explaining things now are you
going to explain to me why you are 100% sure

please correct me if iam wrong but i also agree with you

cheers mate thanks
http://www.diyaudio.com/forums/showt...522#post423522
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Old 1st March 2006, 11:49 PM   #410
mikeks is offline mikeks  United Kingdom
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http://www.diyaudio.com/forums/showt...430#post422430
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