(a)Find the Q-points of the transistors in the CMOS op amp shown if VDD = VSS = 5 V, IREF = 250 μA, K'n = 50 μA/V2, VTN = 0.75 V,K'p = 20 μA/V2, and VTP =− 0.75 V. (b) What is the voltage gain of the op amp assuming the output stage has unity gain and λ = 0.017 V−1 for both transistor types? (c) What is the voltage gain if IREF is changed to 500 μA?(d) What is the offset voltage of the ampliﬁer? +VDD50 мM4 50100M5M1M210M6м, 92020voM11IREF25M7M9M10Figure 16.42 Op amp with currentmirror bias of the class-AB outputMg2010-Vssstage.

Answered: +VDD 50 м M4 50 100 M5 M1 M2 10 M6 м, 9…

+VDD 50 м M4 50 100 M5 M1 M2 10 M6 м, 9 20 20 vo M11 IREF 25 M7 M9 M10 Figure 16.42 Op amp with current mirror bias of the class-AB output Mg 20 10 -Vss stage.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter18: Resistive-inductive Parallel Circuits

Section: Chapter Questions

Problem 13PP: In an R-L parallel circuit, IT=1.25 amps, R=1.2k, and XL=1k. Find IR

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Question

(a)Find the Q-points of the transistors in the CMOS op amp shown if V_DD = V_SS = 5 V, I_REF = 250 μA, K'_n = 50 μA/V², V_TN = 0.75 V,K'_p = 20 μA/V², and V_TP =− 0.75 V. (b) What is the voltage gain of the op amp assuming the output stage has unity gain and λ = 0.017 V⁻¹ for both transistor types? (c) What is the voltage gain if I_REF is changed to 500 μA?(d) What is the offset voltage of the ampliﬁer?

+VDD
50 м
M4 50
100
M5
M1
M2
10
M6
м, 9
20
20
vo
M11
IREF
25
M7
M9
M10
Figure 16.42 Op amp with current
mirror bias of the class-AB output
Mg
20
10
-Vss
stage.

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