What is the voltage gain in Fig. 36-30c? What is the cutoff frequency? What is the frequency response?
Question 36.11: What is the voltage gain in Fig. 36-30c? What is the cutoff ...
This is an inverting first-order low-pass filter. With Formulas (36– 18) A_V=\frac{-R_2}{R_1}
and (36-19),f_c=\frac{1}{2\pi R_2 C_1}
the voltage gain and cutoff frequencies are
A_V=\frac{-43 K\Omega}{220 K\Omega}=-195 f_c=\frac{1}{2\pi (43 K\Omega)(100 pF)}=37 KHzFigure 36-30d shows the frequency response. The voltage gain is 45.8 dB in the passband. The response breaks at 37 kHz and then rolls off at a rate of 20 dB per decade.
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