A certain op-amp has three internal amplifier stages with midrange gains of 30 dB, 40 dB, and 20 dB. Each stage also has a critical frequency associated with it as follows: fcl = 600 Hz,fc2 = 50 kHz, and fc3 = 200 kHz.
(a) What is the midrange open-loop gain of the op-amp, expressed in dB?
(b) What is the total phase shift through the amplifier, including inversion, when the signal frequency is 10 kHz?
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