Figure 6 (a) shows the circuit diagram for a differential amphfier. You may assumethat M and M, have identical parameters. Referring to Figure 6 (a):(a)What kind of amplifier is it? What is its role in a three-stage op amp?Draw the small signal equivalent eircuit and derive the differential voltage gainAag. For the analysis consider RDI RD2>>Rp State any assumption.(b)RD. gml gm gm, and r re=rWhat is the new Adr in the circuit of Figure 6 (b), where a PMOS current sourcehas replaced the two drain resistors Ror R Rp and a NMOS current sinkhas replaced the source resistor Rs?(c)What are the advantages in using the circuit of Figure 6 (b) instead of Figure6 (a) to realize an op amp?(d)VenMsMgRp1RpaVoHM,MyMMaM3Vss 0 VVss 0 VFigure 6(b)Figure 6 (a)

Solution- a) It is a different amplier (single stage) . Its role in three stage opamp to provide…

igure 6 (a) shows the circuit diagram for a differential amplifier. You may assulne hat M, and Ma have identical parameters. Referring to Figure 6 (a): a) What kind of amplifier is it? What is its role in a three-stage op amp? b) Draw the small signal equivalent circuit and derive the differential voltage gain Adiy. For the analysis consider RDI Rp2= Rp. gml= gm2 gm. and ra ra2= r >>Rp State any assumption. c) What is the new Adir in the circuit of Figure 6 (b). where a PMOS current source has replaced the two drain resistors Roi has replaced the source resistor Rs? = Rp2= RD and a NMOS current sink

igure 6 (a) shows the circuit diagram for a differential amplifier. You may assulne hat M, and Ma have identical parameters. Referring to Figure 6 (a): a) What kind of amplifier is it? What is its role in a three-stage op amp? b) Draw the small signal equivalent circuit and derive the differential voltage gain Adiy. For the analysis consider RDI Rp2= Rp. gml= gm2 gm. and ra ra2= r >>Rp State any assumption. c) What is the new Adir in the circuit of Figure 6 (b). where a PMOS current source has replaced the two drain resistors Roi has replaced the source resistor Rs? = Rp2= RD and a NMOS current sink

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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