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

Find voltage in circuit using the ideal op-amp technique, Q. Find v o in t...

Q. Find v o in the circuit shown in Figure by using the ideal op-amp technique.

Explain the operation of oscillators, Q. Explain the operation of oscillato...

Q. Explain the operation of oscillators. Oscillator is a circuit that changes dc energy from the power supply into ac energy. An amplifier provided with a positive feedback bec

Bjt, how do I find the ic and ve

how do I find the ic and ve

Phenomenon - fet operation, Phenomenon - Fet operation: For either imp...

Phenomenon - Fet operation: For either improvement- or depletion-mode devices, at drain-to-source voltages very much less than gate-to-source voltages, changing the gate volta

Illustrate the internal architecture of 8085, Microprocessor 1. Write a...

Microprocessor 1. Write an assembly language program to find the highest among two numbers. 2. Draw and illustrate the internal architecture of 8085 briefly. 3. What is t

Basic electromagnetic principles, It has been known for a thousand years or...

It has been known for a thousand years or more (originating in China) that certain (magnetic) materials would always orientate    themselves in a  particular direction if suspended

Pop instruction, POP Instruction This instruction  copies the contents ...

POP Instruction This instruction  copies the contents  of the top  two locations  of the  stack into the  specified  register pair. The  contents  of stack pointer register are

Explain television signal transmission, Q. Explain Television signal transm...

Q. Explain Television signal transmission? Television signals in television signal transmission are the electric signals generated by converting visual images through raster (T

Calculate voltage and frequency, The stator and rotor of a three-phase, 440...

The stator and rotor of a three-phase, 440-V, 15-hp, 60-Hz, eight-pole, wound-rotor induction motor are both connected in wye and have the following parameters per phase: R1 = 0.5

Input output, Input output The parallelogram symbol  is used to repres...

Input output The parallelogram symbol  is used to represent the input output  process as shown  below.                 IN01H

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