Calculate the gate to source voltage VGs for a NMOS transistor with B = 2200 µA/V?, V = 1 V and operating in saturation with a transconductance gm = 5 mS. Q1 (a) Draw the small signal equivalent circuit model valid in the mid-band frequency range for the circuit shown in Figure 1 and identify the kind of amplifier formed by the NMOS transistor M1. Clearly state any assumption. (b) Using two transistors nominally identical to M1 and the configuration shown in Figure 1, design a common source voltage amplifier with improved gain. Draw the mid-band frequency range for the resulting circuit in the hypothesis that the value R, is very big (open circuit) and state what kind of configuration you used. Explain why the resulting output impedance is bigger when compared to a single stage common source amplifier. (c) VDD RI Rp Vout M1 Cs Vin R2 Rs Vss = 0 V Figure 1

Calculate the gate to source voltage VGs for a NMOS transistor with B = 2200 µA/V?, V = 1 V and operating in saturation with a transconductance gm = 5 mS. Q1 (a) Draw the small signal equivalent circuit model valid in the mid-band frequency range for the circuit shown in Figure 1 and identify the kind of amplifier formed by the NMOS transistor M1. Clearly state any assumption. (b) Using two transistors nominally identical to M1 and the configuration shown in Figure 1, design a common source voltage amplifier with improved gain. Draw the mid-band frequency range for the resulting circuit in the hypothesis that the value R, is very big (open circuit) and state what kind of configuration you used. Explain why the resulting output impedance is bigger when compared to a single stage common source amplifier. (c) VDD RI Rp Vout M1 Cs Vin R2 Rs Vss = 0 V Figure 1

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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Concept explainers

Multistage Amplifier

The multistage amplifier is generally a voltage or power amplifier. The multistage amplifier has a number of single stage amplifier that are cascaded together. Since a single stage amplifier output is not useful, they are being replaced with multistage amplifiers or multistage transistor amplifiers. The multistage amplifier are used where the gain required is high or the input signal is very small such that only a single stage amplifier cannot amplify it.

Question

Calculate the gate to source voltage VGs for a NMOS transistor with ß = 2200
µA/V?, V = 1 V and operating in saturation with a transconductance gm = 5 mS.
Q1
(а)
Draw the small signal equivalent circuit model valid in the mid-band frequency
range for the circuit shown in Figure 1 and identify the kind of amplifier formed
by the NMOS transistor M1. Clearly state any assumption.
(b)
Using two transistors nominally identical to M1 and the configuration shown in
Figure 1, design a common source voltage amplifier with improved gain. Draw
the mid-band frequency range for the resulting circuit in the hypothesis that the
value R, is very big (open circuit) and state what kind of configuration you used.
Explain why the resulting output impedance is bigger when compared to a
single stage common source amplifier.
(c)
VDD
R1||
Rp
Vout
M1
Cs
Vin
R2
Rs
Vss = 0 V
Figure 1

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