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VDD R1 R2 Vo R3

VDD R1 R2 Vo R3

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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V pD R1 R, Vo R; {
Transcribed Image Text:V pD R1 R, Vo R; {
The MOSFET in the amplifier circuit below in Figure 2 has threshold voltage V, = 2V, MOSFET parameter k, = H„Cox(W/L) = 4mA/V?. Ignore channel length modulation. R1 = 1kN, R2 = 1MQ, R3 = 1MQ. VDD = 8V. As labeled, input and output of the amplifier are nodal voltages of vin and vo, respectively. The input voltage source has zero resistance and produces a signal vsig which is a sinusoidal signal with zero average. Vsig= 10sin(t) in mV. t is time. (a) Find the DC voltage at the output node vo and calculate the transconductance of the MOSFET (gm) under this DC bias. (Hint: you can potentially simplify your calculation using the fact that R2, R3 >> R1.)
Transcribed Image Text:The MOSFET in the amplifier circuit below in Figure 2 has threshold voltage V, = 2V, MOSFET parameter k, = H„Cox(W/L) = 4mA/V?. Ignore channel length modulation. R1 = 1kN, R2 = 1MQ, R3 = 1MQ. VDD = 8V. As labeled, input and output of the amplifier are nodal voltages of vin and vo, respectively. The input voltage source has zero resistance and produces a signal vsig which is a sinusoidal signal with zero average. Vsig= 10sin(t) in mV. t is time. (a) Find the DC voltage at the output node vo and calculate the transconductance of the MOSFET (gm) under this DC bias. (Hint: you can potentially simplify your calculation using the fact that R2, R3 >> R1.)
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