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

Microprocessors: We have learnt 8085 family of microprocessors. Initially, we understand basic components of a computer, 8085 microprocessor architecture and assembly language

A quantizer has 130 quantum levels that exactly span the extremes of a symmetrically ?uctuating message with step size δv = 0.04 V. Determine the following: (a) |f(t)|max.

Q. JFET Common Source Amplifier? The common source configuration for a FET is similar to the common emitter bipolar transistor configuration, and is shown in figure. The common

Q. Explain about Common Channel Signalling? Common Channel Signalling (CCS), centralized maintenance and automatic faultdiagnosis and interactive human-machine interface are so

Q. Parallel - flash converter? Parallel / flash converter. Also known as parallel A/D converter, this circuit is the simplest to understand. It's formed of a series of co

Balanced Wye-Connected Load Let us consider a three-phase, four-wire 208-V supply system connected to a balanced wye connected load with an impedance of 10 20° , as shown in F

Q. In the circuit shown in Figure the switch opens at t = 0. Develop and execute a P Spice program to solve for v(t), and use PROBE to obtain a plot of v(t). Hint: Use the follo

Issues for Installation of Meters The subsequent should also be ensured: a) Appropriate crimping device should be used for crimping the lugs. Thimbles should be of appro

UniJunction Transistor: (abbreviated as UJT), also called the double base diode, is a 2 layer, 3 terminal solid state switching device. The device has a unique characteristi