Answered: DD V pp lo VEE

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question

(a) What is the output current I_O in the circuit
shown if −V_EE = −10 V and
R = 20 ohm? Assume that the MOSFET is saturated.
(b) What is the minimum voltage V_DD
needed to saturate the MOSFET if V_TN = 2.5 V
and K'_n = 0.25 A/V₂. (c) What must be the power
dissipation ratings of resistor R and the FET.

Expert Solution

Step 1

a) The circuit can be modified for better understanding is given as

The voltage at non inverting terminal is given as 0V hence by virtual ground concept the voltage as Inverting terminal is given as 0V
The current I can be found as

Step 2

The drain current equation in case of saturation is given as

Thus minimum voltage of V_DD should be 4.5 V for the MOSFET to be in saturation.

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