calculating
Hi,
assuming we´re talking about MOSFET amplification I would
calculate as follows: Input impedande of a non inverting input is
about the value of the input resistor to ground, as the fet´s input impedance is that high that you need not take it into account in
real life. Inverting input with feed back: about the amount of the
series resistor in the signal path, as the input impedance of the DUT is about zero.
Output: A bit complicated but I do it like this: On resistance of the
FET plus Source resistor plus Outputimpedance of the power supply divided thru the amount of feedback (open loop amplification´thru closed loop amplification.
Uli
Hi,
assuming we´re talking about MOSFET amplification I would
calculate as follows: Input impedande of a non inverting input is
about the value of the input resistor to ground, as the fet´s input impedance is that high that you need not take it into account in
real life. Inverting input with feed back: about the amount of the
series resistor in the signal path, as the input impedance of the DUT is about zero.
Output: A bit complicated but I do it like this: On resistance of the
FET plus Source resistor plus Outputimpedance of the power supply divided thru the amount of feedback (open loop amplification´thru closed loop amplification.
Uli
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