9.43 A direct-coupled amplifier has a low-frequency gain of
40 dB, poles at 1 MHz and 10 MHz, a zero on the negative real
axis at 100 MHz, and another zero at infinite frequency.
Express the amplifier gain function in the form of Eqs. (9.61)
and (9.62), and sketch a Bode plot for the gain magnitude.
What do you estimate the 3-dB frequency