What is the quiescent current in the class-AB stage as shown if Kp = 400 μA/V2, Kn = 600 μA/V2, VT P = −0.8 V, and VT N = 0.7 V? O +10 VM12.2 VM26 -10 VFigure P15.108

Given input voltage V1 = 2.2 V Difference of gate to source voltage of both transistor are…

Answered: O +10 V M1 2.2 V M2 6 -10 V Figure…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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What is the quiescent current in the class-AB stage as shown if K_p = 400 μA/V², K_n = 600 μA/V², V^{T P} = −0.8 V, and V^{T N} = 0.7 V?

O +10 V
M1
2.2 V
M2
6 -10 V
Figure P15.108

Expert Solution

Step 1

Given input voltage V₁ = 2.2 V

Difference of gate to source voltage of both transistor are

$V_{G S 1} - V_{G S 2} = V_{1} V_{G S 1} - V_{G S 2} = 2.2 V$

Calculating drain current from the below expression

$(V_{G S 1} - V_{G S 2}) = V_{T N} + \sqrt{(\frac{2 I_{D 1}}{K_{n}})} - (V_{T P} - \sqrt{\frac{2 I_{D 2}}{K_{P}}}) 2.2 V = 0.7 V + \sqrt{(\frac{2 I_{D 1}}{600 \times 10^{- 6}})} - (0.8 - \sqrt{\frac{2 I_{D 2}}{400 \times 10^{- 6}}})$

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