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

Use mesh analysis and nodal analysis to determine current, Q. Use (a) mesh ...

Q. Use (a) mesh analysis and (b) nodal analysis to determine the current through the 4-resistor of the circuit of Figure.

Explain digital signal formatting, Q. Explain Digital Signal Formatting? ...

Q. Explain Digital Signal Formatting? After quantization and coding the samples of the message, a suitable waveform has to be chosen to represent the bits. This waveformcan the

Determine the active - reactive and apparent power, Determine the active - ...

Determine the active - reactive and apparent power: In the given circuit, determine the active, reactive and apparent power. Figure Solution  The inductive

Module of the rated currents - transformer, Module of the rated currents - ...

Module of the rated currents - transformer: The transformer of the Face(Figure) 2 is a transformer of type Delta-Y (the neutral of Y is grounded). The rated output is of 1500

Convert decimal numbers into binary, Q. Convert the following DECIMAL numbe...

Q. Convert the following DECIMAL numbers into BINARY, double check by converting the result BINARY to DECIMAL. Assume all binary numbers are represented by 12 bits on LHS of binary

Calculate the analog output voltag, For the 3-bit 2 n -R D/A converter of ...

For the 3-bit 2 n -R D/A converter of Figure, calculate the analog output voltage when the input is (a) 100, and (b) 010. Solution a. For the binary input 100, switches con

Perform analysis and calculate the values of vgs, A small signal amplifier ...

A small signal amplifier circuit is given in figure Q 4. The values of RD and RS must be set such that the gain of the system is 8. It is also known that Vgs = ¼ Vp. a). Per

What are the disadvantages of using robots, What are the Disadvantages of u...

What are the Disadvantages of using robots -  They can find it difficult to deal with 'unusual' circumstances for example a door is missing from a car waiting on the paint spra

Explain current divider rule, Explain current divider rule Current flow...

Explain current divider rule Current flow through at every resistor that connected by parallel can be find by using current divider rules (CDR).

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