What is meant by biasing transistor, Electrical Engineering

Assignment Help:

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.


Related Discussions:- What is meant by biasing transistor

Hilda output - externally initiated signals , HILDA ( Output) It is ...

HILDA ( Output) It is  called hold acknowledge signals it is active  high  i e it  goes high when  microprocessor receives HOLD signal.

Unit impulse response of a linear system, Q. The unit impulse response h(t)...

Q. The unit impulse response h(t) of a linear system is h(t) = 5e -t cos(2t - 30°). Determine H(s).

Factors involved in the voltage build up of shunt generator, Q.   List and ...

Q.   List and explain the factors involved in the voltage build up of shunt generator. Ans. following factors are involved in voltage build up of shunt generation

Explain the term assembler directives, Explain the term assembler directive...

Explain the term assembler directives. An assembler directive is a statement to provide direction to the assembler to execute the task of assembly process. These assembler dire

Determine the motor speed at a specific line current, Q. A dc series motor ...

Q. A dc series motor operates at 750 r/min with a line current of 100 A from the 250-V mains. Its armature-circuit resistance is 0.15  and its series-field resistance is 0.1 . As

Kirchoff''s current law, Kirchoff's Current Law The total current ent...

Kirchoff's Current Law The total current entering a node in a circuit is equal to the total current leaving that node. A Node is a junction between two or more components.

Illustrate in detail b-spline and cubic bezier surfaces, Define ruled surfa...

Define ruled surface and surface of revolution. Illustrate in detail B-spline and cubic Bezier surfaces with their important properties.

Magnetic permeability and the b/h curve, Magnetic permeability and the B/H ...

Magnetic permeability and the B/H curve To measure the relationship between field strength H and flux density B for a material, a sample is made into a closed ring and a magne

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