Unformatted text preview: Solution
Part (a) This is an enhancementmode device.
Part (b) Make a plot of
Then extend the plot to vs. with
is the saturation region, for example at
, and estimate
(see below). 21 = 15 V. 55:041 Electronic Circuits. The University of Iowa. Fall 2011. Problem 19 For the circuit below, determine . (5 points) Solution
The gate current is zero, so Further
(
Thus
(
(
Solving using trialanderror gives 2.57 V. 22 (
( 55:041 Electronic Circuits. The University of Iowa. Fall 2011. Problem 20 Determine the output resistance for the circuit shown. (5 points) Solution
To determine
set the independent source (
to 0, and add a test voltage and determine
the test current that flows. This is shown in (a) below. Note that
, so that the voltagecontrolled current source is off, and the equivalent circuit is shown in (b). (a) (b) 23...
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This note was uploaded on 10/26/2013 for the course ECE 55:041 taught by Professor Kruger during the Fall '11 term at University of Iowa.
 Fall '11
 Kruger

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