4.15 For the NMOS common-source amplifier in Figure P4.15, the transistor parameters are: VTN = 0.8 V, K, = 1 mA/V², and 2 = 0. The circuit para- meters are VDD = 5 V, Rs = 1 k2, Rp = 4 k2, R1 = 225 k2, and R2 = 175 k2. (a) Calculate the quiescent values Ipo and VpsQ. (b) Deter- mine the small-signal voltage gain for R1 = 0. (c) Determine the value of Rị that will reduce the small-signal voltage gain to 75 percent of the value found in part (b). VDD Rp Rin Cc2 Cci Figure P4.15

4.15 For the NMOS common-source amplifier in Figure P4.15, the transistor parameters are: VTN = 0.8 V, K, = 1 mA/V², and 2 = 0. The circuit para- meters are VDD = 5 V, Rs = 1 k2, Rp = 4 k2, R1 = 225 k2, and R2 = 175 k2. (a) Calculate the quiescent values Ipo and VpsQ. (b) Deter- mine the small-signal voltage gain for R1 = 0. (c) Determine the value of Rị that will reduce the small-signal voltage gain to 75 percent of the value found in part (b). VDD Rp Rin Cc2 Cci Figure P4.15

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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VDD VDD Cc2 o ve RG Figure P4.43 Figure P4.44 4.44 The transistor in the circuit in Figure P4.44 has parameters VTN = 0.4 V, K, = 0.5 mA/V², and 2 = 0. The circuit parameters are Vpp = 3 V and R; = 300 k2. (a) Design the circuit such that Ipo = 0.25 mA and VpsQ = 1.5 V. (b) Determine the small-signal voltage gain and the output resistance R,. ww ww ww ww
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2) Consider an enhancement MOSFET common source amplifier circuit in Figure 2(a). The output characteristic is showed in Figure 2(b). Assume that the circuit is operating in the saturation region and k = 5 mA/V2. It also given that ra = ro = 00, Cgd = 2 pF, Cgs = 4 pF, Cas = 1 pF, Cwi = 4 pF and Cwo = 3pF. a. Using DC load line, prove that Ino = 22.5 mA and VpsQ = 5.5 V for Vaso = 2.5V. (Please attach the characteristic graph provided in your working solution) b. Draw the AC equivalent circuit at mid frequency. c. Estimate the voltage gain Av = Vo /Vi. d. Determine the dominant high cut – off frequency for the circuit. 10 V Rp 100 2 6 MQ C2 ci Rs RL Vo 1002 R: 5002 Rs Vo 14 MQ Cs 100 2 Vs Figure 2(a) 60- 50 30 20 10 9. 10 Figure 2(b) (yu) 4
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