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Fully balanced Opamp
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Old 29th August 2008, 07:13 PM   #21
jam is offline jam  United States
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Thanks for the information.

I could not find the article................buried somewhere.
I have not seen the circuit used in any commercial design and JLH has not publised a full design using it. The idea should lend itself well to a balanced bridged design.


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Old 29th August 2008, 07:21 PM   #22
Nelson Pass is offline Nelson Pass  United States
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Fully balanced Opamp
Originally posted by rkn
For what? For my version or if I want to use the John Lindsey Hood current mirror? What about an DC-Servo?
You need something for either version. You could have the output of a servo
driving the current source of the JFETs. A similar concept is found on the
THS4131 symmetric gain stage.

Alternatively you can load the output to ground and put adjustments in the
circuit for exactly establishing a balance point (hoping that it doesn't drift much).

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