ps8_2011

# ps8_2011 - ECE2c Problem set #8: These are exercises in...

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1 ECE2c Problem set #8: These are exercises in nodal analysis, real and complex poles, and finding (and plotting) the frequency and transient response of circuits. . Problem 1: The problem uses the MOSFET equivalent circuit to the right. Note the FET input capacitance Cgs. Ignore DC bias analysis. You don’t need it. The transistor has transconductance gm. Its output resistance Rds is infinity. (a) Draw a small-signal equivalent circuit of the circuit. (b) gm=20 mS. Cgs=1 pF, C L =20 pF. R L =200 Ohms, R gen =500 Ohms Find, by nodal analysis, a small- signal expression for Vout(s)/Vgen(s), with the answer given in dimensionless ratio-of-polynomials form: Ks m 1 a 1 s a 2 s 2 ... 1 b 1 s b 2 s 2 ... (c) Find any/all pole and zero frequencies of the transfer function, in Hz: Draw a clean Bode Plot on semilog paper of Vout/Vin, LABEL AXES, LABEL all relevant gains and pole or zero frequencies, Label Slopes (d) Vgen (t) is a 100 mV amplitude step- function. Find Vout(t), and plot it below.

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## This note was uploaded on 12/28/2011 for the course ECE 2C taught by Professor Yue during the Fall '08 term at UCSB.

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ps8_2011 - ECE2c Problem set #8: These are exercises in...

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