Electronics Engineering Question:
Download Job Interview Questions and Answers PDF
Explain why the input impedance of OP-Amp is so high?
Answer:
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.
Download Electronics Engineering Interview Questions And Answers
PDF