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

Biasing, Biasing: Bipolar transistor amplifiers have to be properly bi...

Biasing: Bipolar transistor amplifiers have to be properly biased to operate properly. In circuits made up with individual devices (discrete circuits), biasing networks contai

Higher order address bus - pins and signals , Higher order  Address Bus ...

Higher order  Address Bus The 8085 microprocessor  has 8 pins  dedicated to higher order address A15 - A8. These pins  are used to connect  higher  order address bus. These  p

What is tunnel effect and applications of tunnel effect, What is tunnel eff...

What is tunnel effect? Discuss the Alpha decay as an example of tunnel effect. Prove that tunneling increases on decreasing the height and width of the barrier. Explain what do you

Core electron binding energies, Perform a Hartree-Fock geometry optimizatio...

Perform a Hartree-Fock geometry optimization calculation of butadiene using a minimal basis set. Repeat with the 6-311G(d,p) basis set, using the optimized minimal basis set geomet

Distinguish between ferromagnetic and paramagnetic materials, Distinguish b...

Distinguish between ferromagnetic and paramagnetic materials, mentioning at least one example of each. Ferromagnetic Materials: These are materials wherein magnetic dipoles i

Dc power supplies, 1.   Design four (4) different 5 volt DC power supplies...

1.   Design four (4) different 5 volt DC power supplies to operate from 230 volts AC. The four power supplies are to have the same full wave rectifier with capacitive filte

Find the diameter of a circular waveguide, Q Find the diameter of a circula...

Q Find the diameter of a circular waveguide that will have a lower cutoff frequency of 10 GHz and also specify its largest usable frequency.

What are the performance measures of oscillator circuits, Q. What are the p...

Q. What are the performance measures of oscillator circuits? 1. Stability: This is determined by the passive components. R, C and L determine frequency of oscillations. If R ch

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