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In Reply to: Re: offset voltage, common mode distortion 627 vs. 637, output load posted by Elso Kwak on February 2, 2002 at 08:14:55:
Hi,> You seem to be so sure to emphasise the above line.
Actually, I was commenting on it.
> Maybe I am totally wrong but with a cascode connected input
> stage the above effect will be nill.Not so.
> Or are you not referring to the Miller effect of the input
> stage?.I was refering to common mode effects in general. The original poster referred to common mode modulation of the Input Fets by the signal, unless the cascode elements directly reference the common point of the long tailed pair cascoding is not effective in this case, though the overall magnitude of the effect would be larger if miller amplified.
I'm much more concerend about common mode induced distortion in circuits with a long tailed pair input (BJT, MOSFET, J-Fet - all are affected) if the circuit is operated non inverting.
Ciao T
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Follow Ups
- Re: offset voltage, common mode distortion 627 vs. 637, output load - Thorsten 11:42:24 02/02/02 (1)
- Re: ???????????????????????(NT) - Elso Kwak 13:33:34 02/02/02 (0)
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