Question

Calculate the value of open loop frequency response curve at any point beyond break frequency in 741C op-amp?

(a) 1000000Hz

(b) 1000Hz

(c) 10000000Hz

(d) 100000Hz

This question was addressed to me during an interview.

I'd like to ask this question from Closed-Loop Frequency Response and Circuit Stability topic in chapter Practical Limitations of Op Amp Circuits of Linear Integrated Circuits

Answer 1

Accurate option is (a) 1000000Hz

Here's the scoop: For a 741C op-amp the gain=200000 and the break frequency = 5Hz. Therefore, the unity gain bandwidth or the product of the coordinates (gain and frequency) of any point beyond the break frequency = 200000×5Hz =1MHz =1000000Hz.