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

Hybrid model for two-port network, Hybrid Model for Two-port Network:- ...

Hybrid Model for Two-port Network:-             V 1 = h 11 i 1 + h 12 V 2                                                                             I 2 = h 1 i 1

Electromagnetic torque, The torque produced by each conductor in the field ...

The torque produced by each conductor in the field will be:  where A is the area of the armature winding in the magnetic field, Ia is the current in armature winding, and B

3phase unbalanced load flow, under three phase 4 wire load unbalanced distr...

under three phase 4 wire load unbalanced distribution network how to calacualte the voltage across the load when no load resistance is specified, however the real and reactive powe

What is microprocessor, Write short notes of the following. a)    Microproc...

Write short notes of the following. a)    Microprocessor b)    Modes of data transfer. c)    I/O processor d)    Associative memory e)    Software and Hardware interrupt

compute the cavity , Consider the optical cavity shown below. (...

Consider the optical cavity shown below. (a) Compute the photon lifetime. (b) Compute the cavity Q (assume that the wavelength region of interest is 500nm). (c) Su

Show the load current is independent of zl, Q. A negative impedance convert...

Q. A negative impedance converter is used, as shown in Figure. Show that the load current i L is given by v in /R, which is independent of Z L . Note that since the load sees a cu

Write explanatory notes on 8284 clock generator, Write explanatory notes on...

Write explanatory notes on 8284 Clock generator. The 8284 is an ancillary element to the microprocessors. Without this clock generator, a few additional circuits are needed to

Features of tariff policy, Features of tariff policy: For projects who...

Features of tariff policy: For projects whose tariff is determined by performance- based cost of service regulation, the advantages of decreased tariff after full depreciation

Determine the three main types of intelsat satellite, a. Determine the rati...

a. Determine the ratio of cross section of a circular waveguide to that of a rectangular one, if each is to have similar cut off wavelength for its dominant mode. b. Compare wav

Astable multivibrator circuit, how does this circuit work and what are th e...

how does this circuit work and what are th electrical components in it do?

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