What is meant by biasing transistor, Electrical Engineering

Q. What is meant by biasing transistor?

The purpose of dc biasing of transistor is to obtain a certain dc collector current at a certain dc collector voltage. These values of current and voltage are expressed in terms of operating point. To obtain the operating point we make use of some circuits called biasing circuits. Only the fixing of a suitable operating point is not sufficient It must also be ensured that it remains there. In a transistor the operating point shifts with the use of circuit. Such a shift of operating point may drive the transistor into undesirable region. There two reasons for the shift of operating point. Firstly the transistor parameters are temperature dependent. Secondly the parameters (like beta) change from unit to unit. The requirements of biasing a transistor are: establish the operating point in the active region of the characteristics, so as that on applying the input signal the instantaneous operating point does not move to saturation or cut off region. Stabilize the collector current against temperature variations.

Make the operating point independent of transistor parameters so that it does not shift when the transistor is replaced by another of the same type of circuits.

Posted Date: 6/11/2013 5:45:39 AM | Location : United States







Related Discussions:- What is meant by biasing transistor, Assignment Help, Ask Question on What is meant by biasing transistor, Get Answer, Expert's Help, What is meant by biasing transistor Discussions

Write discussion on What is meant by biasing transistor
Your posts are moderated
Related Questions
Single Phase Full Wave Controlled rectifier The single  phase  half  wave controlled  rectifier  produce only one pulse  of load  current  during  one cycle  of supply voltage

I need to get a summary for a radio over fiber paper that I have , the summary need to be on the following format: abstract, introduction,methodology,results, conclusion and refere

Scale-space pyramids   Write an m-file "scale_space.m" which computes scale space representation of an input image for a given scale "sigma" and displays them. (i) 4 scale

Consider an RLC series circuit excited by v(t) = V m cos ωt in the time domain. By using superposition, solve for the time-domain forced response of the resultant current through

Q. Draw the logic diagram of an SR latch using only NAND gates, and obtain the truth table for that implementation.

Q. A three-phase transformer bank consisting of three 10-kVA, 2300:230-V, 60-Hz, single-phase transformers connected in Y- is used to step down the voltage. The loads are connecte

SOL. Ramp Type VM: The operating principle of the ramp type DVM is based on the measurement of the time it takes for a linear ramp voltage to rise from 0 V to the level of the inp

Q. Illustrate simple telephone communication system with circuit and equation of current flow in microphone? Ans: Simple  Telephone  Communication: In the simplest form of

Q. An integrator as shown in Figure is to be designed to solve dy(t) / dt + 2000y (t) = 0 with y(0) = 5. If R i is chosen to be 10 k, find C f .

I need to prove of shockly diode equation