Explain why the input impedance of OP-Amp is so high?

Submitted by: Administrator
In OPAMP, we have 4 stages, 1st stage, i.e the input stage is a dual i/p balanced o/p opamp whose i/p resistance is v high. and if we use FET in case of BJT for 1st stage diffamp, then i/p resistance will be v high in M ohms.
Submitted by: Administrator

Read Online Electronics Engineering Job Interview Questions And Answers