What is the midrange open-loop gain of the op-amp expressed in dB

Question

A certain op-amp has four internal amplifier stages with midrange gains of 185,000, 177,000, 200,000, and 165,000. Each stage also has a critical frequency associated with it as follows: fc1 = 500 Hz, fc2 = 5 kHz, fc3 =100 kHz, and fc4 = 1MHz.

a) What is the midrange open-loop gain of the op-amp expressed in dB?

b) What is the complete phase response through the amplifier stages, minus

inversion, when the signal frequency is 5 kHz?

c) Sketch the complete phase response vs. frequency for the four internal amplifier stages?

d) Sketch the composite response for gain vs. frequency including the roll-off rate

umm if anyone could show me how to asnwer at least 3 of the questions it'll be great. i dunno how to do these

Answer 1

you have to tell me what frequency "midrange" means.

1.08e+21 by multiplying the 4 numbers together, which is way too high to make any sense. which is 210 db !

no sketching ability here.