Ac Analysis of pn Diode Circuits 1.65 The circuit of Fig. P1.65 utilizes a pn diode operating in the small-signal mode to implement an RC low-pass fi lter with a 23-dB frequency that is current...

Ac Analysis of pn Diode Circuits 1.65 The circuit of Fig. P1.65 utilizes a pn diode operating in the small-signal mode to implement an RC low-pass fi lter with a 23-dB frequency that is current controlled. (a) Draw the small-signal equivalent circuit, derive its transfer function H(j ), and show that its 23 dB frequency is 0 5 IDy(VTC). (b) Find C so that 0 5 100 krad/s at ID 5 0.1 mA. (c) Find ID so that the magnitude of H(j ) is 26 dB at 5 50 krad/s. (d) Find ID so that the phase angle of H(j ) is 2308 at 5 500 krad/s.