1. Consider the differential amplifier (single end output) biased by the Widlar current mirror. Assume Van-0.7 V for Q1 and Q2. For Q3 and Q4, Vac0.7 V for the ImA collector current(ic). VA for Q1 and Q2. VA 100 V for Q3 and Q4 B-200 for all BJTS (b) Determine values of R1 and R2 such that the biasing current(k) for the differential pair to be 0.14 mA. Find the output resistance of the Widlar current mirror. Find the values of differential mode voltage gain and common mode voltage gain. Find the values of differential mode input-resistance, output resistance and the common mode rejection ratio(CMRR).

1. Consider the differential amplifier (single end output) biased by the Widlar current mirror. Assume Van-0.7 V for Q1 and Q2. For Q3 and Q4, Vac0.7 V for the ImA collector current(ic). VA for Q1 and Q2. VA 100 V for Q3 and Q4 B-200 for all BJTS (b) Determine values of R1 and R2 such that the biasing current(k) for the differential pair to be 0.14 mA. Find the output resistance of the Widlar current mirror. Find the values of differential mode voltage gain and common mode voltage gain. Find the values of differential mode input-resistance, output resistance and the common mode rejection ratio(CMRR).

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

BJT (Bipolar Junction Transistor)

A BJT is a semiconductor device with 3 terminals that consist of a p-n junction diode that can amplify the signal or current. It is a current-controlled device. The three BJT terminals are base, collector, and emitter. The BJT works with the charge carrier, the two type of carriers in the BJT are holes and electrons, the charge carriers flow by the process of recombination. The signal to be amplifier is generally given as the input at the base terminal and an amplified form of it is available at the collector terminal.

Question

1. Consider the differential amplifier (single end output) biased by the Widlar current mirror.
Assume Van-0.7 V for Q1 and Q2. For Q3 and Q4, Van-0.7 V for the ImA collector
current(ic). VA- for Q1 and Q2. VA 100 V for Q3 and Q4. B-200 for all BJTS
20€
Determine values of RI and R2 such that the biasing current(kce) for the differential
pair to be 0.14 mA.
Find the output resistance of the Widlar current mirror.
Find the values of differential mode voltage gain and common mode voltage gain.
Find the values of differential mode input-resistance, output resistance and the
common mode rejection ratio(CMRR).
RI
03
-10V
VOC
90V
83
444
VEE
2
R2
B
RA
2400
yout
vini

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