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

Explain the principle of a thermocouple, Explain the principle of a thermoc...

Explain the principle of a thermocouple. Give two examples of some common thermocouples. Thermocouples : They are used for the measurement of temperature. While two wires of v

What are the drawbacks of microprocessor, There is a limitation on the size...

There is a limitation on the size of data. Most Microprocessor does not maintain floating-point operations.

Working of an astable multivibrator, Q. With the help of a npn transistor c...

Q. With the help of a npn transistor circuit and wave forms explain the working of an astable multivibrator In astable multivibrator both transistors are coupled to each other

Find the equivalent components of the network, Q. At the two terminals (A, ...

Q. At the two terminals (A, B) of a one-port network, the voltage and the current are given to be v(t) =200 √2 cos (377t + 60°) V and i(t) = 10√2 cos(377t + 30°) A. (a) Determin

What is macro, What is macro? A macro is a group of instructions writte...

What is macro? A macro is a group of instructions written within brackets  and recognized  by a name .This is used when a repeated group of instructions is too short or not app

What do you mean by common collector configuration, Q. What do you mean by ...

Q. What do you mean by Common collector configuration? Common collector configuration:In this circuit the collector is common to both the input and the output.Such a configurat

Transfer characteristics , Transfer Characteristics The  transfer char...

Transfer Characteristics The  transfer characteristics of power MOSFET   transfer characteristic shown the variation of ID with V GS    denote the drain current  with shorted

Smart parking system, Design a smart park system using Iot sensors to udate...

Design a smart park system using Iot sensors to udate stautus to a server ?

Explain time-invariant versus time-varying systems, Q. Explain Time-invaria...

Q. Explain Time-invariant versus time-varying systems? When the parameters of a control systemare stationary with respect to time during the operation of the system, the system

Determine whether the diode in circuit, Determine whether the diode (consid...

Determine whether the diode (considered to be ideal) in the circuit of Figure (a) is conducting.

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