hi everyone,

http://www.allaboutcircuits.com/vol_6/chpt_6/10.html

i have to replace op-amps with differencial amplifier in the link. i couldn't find any source about it. how can i use differencial amp. instead of op-amp?

 

google, "differential amplifier"

Here's one now!

 

Your other choice is to decide a differential amplifier is a circuit configuration using an op-amp.

 

google, "differential amplifier"

Here's one now!

oh sorry for forgetting existance of GOOGLE. i know what diff. amp. is, i know what op-amp is, but i cannot find any solution to design diff. amp. version of an op-amp.

 

There might be some confusion with terminology.

Most op-amp chips are differential amplifiers. Differential = difference.

There is a common three-opamp configuration called instrumentation amplifier. The goal of such a circuit is to have very high Common Mode Rejection Ratio (CMRR).

Google instrumentation amplifier.

http://en.wikipedia.org/wiki/Instrumentation_amplifier

 

Or are you asking about this differential amplifier?

http://en.wikipedia.org/wiki/Differential_amplifier

 

Why do you want to replace the op amps in that audio amp with differential amplifiers?