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

Scientists, biography of scientists in different branches

biography of scientists in different branches

High level language - third generation language , High Level Language ( thi...

High Level Language ( third Generation Language ) The difficulties of low  level  languages are overcome  by high  level languages. In  assembly  language  mnemonics  were used

Find whether the load impedance is capacitive or inductive, Q. When the two...

Q. When the two-wattmeter method for measuring three-phase power is used on a certain balanced load, readings of 1200W and 400W are obtained (without any reversals). Determine the

Analog averaging system, Consider the analog averager where x(t) is the inp...

Consider the analog averager where x(t) is the input and y(t) is the output. (a)   Find the impulse response h(t) of the average.  Is this system causal? (b)   Let x(t)

Usage of transistor, Usage of transistor: The bipolar junction transis...

Usage of transistor: The bipolar junction transistor that is abbreviated as BJT was the most generally used transistor in the 1960s and 70s. Even later than MOSFETs became ext

With a block diagram explain fiber optic communication, With a block diagra...

With a block diagram explain fiber optic communication system Ans: The block diagram of a fiber optic communication system is display below: The input signal is giv

Explain about address structure, Q. Explain about Address Structure? A...

Q. Explain about Address Structure? Address Structure: ISDN address structure is illustrated in figure. ISDN number part has a maximum of 15 digits and ISDN sub address part

Solution manual, Ask question #Minimum 100 words accespted#i want solution ...

Ask question #Minimum 100 words accespted#i want solution manual of electronic instrumentation and measurements

Describe small signal fet and its characteristics, Q. Describe small signal...

Q. Describe small signal FET.What are its characteristics? Small signal FET is the FETs used for amplification. The linear characteristic of FET is used for this purpose The in

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