Show that operating point does not depend on beta, Electrical Engineering

Assignment Help:

Q. Prove mathematically that the operating point does not depend on beta, in a potential divider bias circuit ?

To determine the operating point, consider the input section of the voltage divider biasing circuit.

The base current IB is very small compared to the currents in R1 and R2.

I1 ~ I2

So,

VB=R2/ (R1+R2) * VCC

The voltage across the emitter resistor RE

VE=V2-VBE

Then the emitter current is

IE= V2-VBE

And

VC=VCC-ICRC

VCE=VC-VE = (VCC-ICRC)-IERE

Since collector current is approximately equal to emitter current

VCE=VCC-(RC+RE) IC

Since in the above analysis nowhere does beta appear in any equation, which means that operating point does not depend upon the value of beta.


Related Discussions:- Show that operating point does not depend on beta

Illustration of embedded web technology, Illustration of embedded web techn...

Illustration of embedded web technology An oven comprise an embedded processor. Owner can use a web ready mobile phone anywhere to control the oven remotely. By accessing a

Requirement of a hybrid in telephone networks, Q. What is the requirement o...

Q. What is the requirement of a hybrid in telephone networks? How does it work? Ans: Digital exchanges require receive and transmit signals on separate two-wire circuits. Th

Two-level system - princeton, Conceive a system composed of a very large nu...

Conceive a system composed of a very large number N of distinguishable atoms at rest and mutually noninteracting, each of which has only two (nondegenerate) energy levels:0,ε>0 Let

Critical rate of rise of voltage - thyristor , Critical Rate of Rise of Vol...

Critical Rate of Rise of Voltage It  depends on  the junction temperature higher  the junction  temperature lower  the critical rate of  rise of  voltage. It is also known  as

Electronics, what is the difference between half &full wave rectifier

what is the difference between half &full wave rectifier

Lossy transmission line, Q. The model of an elemental length of a lossy tra...

Q. The model of an elemental length of a lossy transmission line is shown in Figure (a), along with its parameters, where R is series resistance per unit length, L is serie

Modern physics, jsidjsiod dkndkdisd dknssbs bsjbabd asj u dhihf ujojdsajfs...

jsidjsiod dkndkdisd dknssbs bsjbabd asj u dhihf ujojdsajfs sjssaidhsidw idgsdusadidjwap ewkeowr krwnrh bwvr [ wrj wrj 1 nnwoi khiwrjw ko e woewerijr rjwr jr rjhpr

Survey methods and analysis - power supply, Survey Methods and Analysis - P...

Survey Methods and Analysis - Power Supply There are two major methods of gathering information from customers: qualitative and quantitative.  Quantitative Rese

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd