Explain the fixed bias circuit, Electrical Engineering

Assignment Help:

Q. Explain the fixed bias circuit?

          The Fig refers to the common emitter collector characteristics and the ac and dc load lines.The Fig shows the points Q1 and Q2 which refers to the operating point at the middle of the dc load line and the point which gives as large as an output possible without too much distortion respectively.

769_Explain the fixed bias circuit.png

 

Biasing is usually done to prevent thermal runaway which damages the transistor permanently. One kind of biasing is the fixed bias circuit.

Analyzing the input loop of the circuit by KVL

Vcc=IbRb + Vbe.

Ib=(Vcc-Vbe)/Rb.

Ic=bIb.

Analyzing the output loop of the circuit by KVL.

Vcc=Ic+Vce

Vce=Vcc-Ic.Rc.

Hence through the input and output loop we have calculated the output current(Ic) and output voltage (Vce).

The current Ib is constant and the network in the dig 2 is called the fixed bias circuit.

In summary we see that selection point Q depends upon a number of factors. Among these factors are the ac and dc loads of the stage the available power supply the maximum power ratings, the peak signal excursions to be handled by the stage and the tolerable distortion.


Related Discussions:- Explain the fixed bias circuit

Society in engineering, Cite a specific example in which the engineer must ...

Cite a specific example in which the engineer must provide maximum efficiency for a given cost

Mr GZ, HOW TO PERFOM AUTO DIALLING USING GSM MODULE

HOW TO PERFOM AUTO DIALLING USING GSM MODULE

Find the resonant angular frequency, Consider the circuit shown in Figure w...

Consider the circuit shown in Figure with R 0 , (b) the quality factor Q, and (c) the maximum impedance Z m . Comment on the applicability of the universal resonance curve.

Construction and operation of jet, Construction and operation of jet: ...

Construction and operation of jet: jet is a three terminal device one terminal capable of controlling the current between the other two. Basic construction of an n chann

How clock signal is generated in 8086, How clock signal is generated in 808...

How clock signal is generated in 8086?what is the maximum internal clock frequency of 8086? Clock input 33% square wave from external clock generator .the external clock genera

Shocly equation, I need to prove of shockly diode equation

I need to prove of shockly diode equation

Determine frequencies that is in the spectrum analyze, Two sine waves along...

Two sine waves along with periods of 10 ms and 30 ms are added to generate a single waveform. A spectrum analyzer is utilized to examine the frequency contents of the waveform. Wha

Sketch the depletion mosfet drain characteristics, Q. Sketch the depletion ...

Q. Sketch the depletion MOSFET drain characteristics The depletion-type MOSFET has a structure similar to that of the enhancement-type MOSFET with one important difference: The

Role of gis in distribution reforms, Role of GIS in Distribution Reforms: ...

Role of GIS in Distribution Reforms: You will agree which distribution is the weakest link in the chain of power supply and has been identified as the key focus area in power

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