125 Find the transfer function TVs =V2s=V1s of the circuit in Figure P125. (a) Find the dc...

12–5 Find the transfer function TVðsÞ =V2ðsÞ=V1ðsÞ of the circuit in Figure P12–5.

(a) Find the dc gain, infinite frequency gain, and cutoff frequency.

Identify the type of gain response.

(b) Sketch the straight-line approximation of the gain response.

(c) Calculate the gain at ω=0:25 ωC, 0:5 ωC, and ωC.

(d) Use MATLAB to plot the Bode magnitude gain response of the circuit. Validate your answers for part (c).

(e) How many dB down from the passband is the filter at two octaves before the cutoff?

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470 www V(t) 50 mH 470 2(1) FIGURE P12-5