OP amps

Thread Starter

bwd111

Joined Jul 24, 2013
117
Do OP amp generally have high input impedance and very low output impedance or low imput and high output
 

WBahn

Joined Mar 31, 2012
29,976
and correct answer was high and high output.
Should you ever decide you want to actually learn something, you might consider switching to a school that is going to teach something instead of just giving you exams with wrong answers.

Also, the input-ouptut impedances depend on what kind of operational amplifier is being talked about. Most people think first about voltage-feedback amplifiers (and this was almost certainly what was meant in the question), in which case it is high input impedance and low output impedance. But there are also current-feedback amplifiers, transconductance amplifiers, transimpedance amplifiers...
 

Thread Starter

bwd111

Joined Jul 24, 2013
117
Should you ever decide you want to actually learn something, you might consider switching to a school that is going to teach something instead of just giving you exams with wrong answers.

Also, the input-ouptut impedances depend on what kind of operational amplifier is being talked about. Most people think first about voltage-feedback amplifiers (and this was almost certainly what was meant in the question), in which case it is high input impedance and low output impedance. But there are also current-feedback amplifiers, transconductance amplifiers, transimpedance amplifiers...
It was on certain controls and I really don't want to waste time on that when I will be specializing in another area that will have nothing to do with this class.
 
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