10 17 points the purpose of this problem is to practice small signal a
10. (17 points) The purpose of this problem
is to practice small-signal analysis of a diode
resistor circuit including the DC bias
analysis. From the last homework
assignment, you hopefully remember doing
Vout VS. Vin analysis on a circuit such as the
one shown here. Assume R₁=1 ks,
R₂-3 k2, an exponential diode model (unless specified otherwise) with Is = X3ID nA, and
that the average value of Vin is zero in this circuit. [DO NOT POST OR SHARE ANY
PART OF THIS COPYRIGHTED ASSIGNMENT. ALL RIGHTS RESERVED.]
(a) Determine the voltage of Vz, a DC ideal voltage source, required to make the forward
diode bias current ID = 1000 Is. Use this value of Vz for parts (b) and (c) of this problem.
(b) Draw the small-signal model of the circuit and label all resistor values on your
drawing. (c) Determine a single value of the transfer function, H(f) at 1 kHz for this
circuit. (d) Repeat part (c) assuming Ip = 0 A and thus Vz=0 V. (e) Repeat part (c)
using Vz-1 V and an "ideal" (perhaps better called a "piece-wise linear") diode model
with Von 0.7 V and Ron=1 kn.
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