Question

Find the bandwidth and total output offset voltage of a voltage follower? The following are the specifications for the op-amp 741: A=200000, fo =5hz and supply voltage =±15v.

(a) fF = 1000hz, VooT = ± 7.5µv.

(b) fF = 100khz, VooT = ± 7.5µv.

(c) fF = 10khz, VooT = ±7.5µv.

(d) fF = 1000khz, VooT = ± 7.5µv.

The question was posed to me in a dream while sleeping

This interesting question is from Voltage Series Feedback Amplifier topic in chapter Operational Amplifier Characteristics of Linear Integrated Circuits

Answer 1

The correct option is (d) fF = 1000khz, VooT = ± 7.5µv.

Here's an easy explanation: Bandwidth fF =A* fF = 200000*5= 1Mhz.

Total output offset voltage, VooT=  ±Vsat/A= ±15/200000 =± 7.5µv.