Fixed bias, Electrical Engineering

Assignment Help:

Fixed bias (base bias):

1496_Fixed bias.png

Diagram: Fixed bias (Base bias)

This type of biasing is also known as base bias. In the instance above figure, the single power source (for instance, a battery) is employed for both collector and base of transistor, even though separate batteries can as well be used.

In the given circuit,

Vcc = IBRB + Vbe

Hence,

IB = (Vcc - Vbe)/RB

For a specific transistor, Vbe does not change significantly during use. Since Vce is of fixed value, on selection of RB, the base current IB is fixed. Hence this kind is termed as fixed bias type of circuit.

As well for given circuit,

Vcc = ICRC + Vce

Hence,

Vce = Vcc - ICRC

The common-emitter current gain of a transistor is a significant parameter in circuit design, and is fixed on the data sheet for a particular transistor. It is represents as β on this page.

Because

IC = βIB

We can acquire IC as well. In this way, operating point given as (Vce,IC) can be set for specific transistor.


Related Discussions:- Fixed bias

Determine the output voltage, Q. An inverting amplifier is designed with th...

Q. An inverting amplifier is designed with three inputs, v 1 , v 2 , and v 3 , as shown in Figure. Determine the output voltage. Then indicate how the circuit may be modified to pe

What is global positioning satellite, What is Global Positioning Satellites...

What is Global Positioning Satellites (GPS) Global positioning satellite (GPS) systems are used to determine exact location of a car, ship, airplane or any conveyance that trav

Evaluate the transfer function of the nested-loop system, Q. Determine the ...

Q. Determine the transfer function C(s)/R(s) of the nested-loop feedback system shown in Figure.

Give the properties and application of cotton, Give the properties and appl...

Give the properties and application of cotton. Cotton : It is base material for insulating fibres. Properties: It can be enhanced by impregnating with varnish. 1)

Draw a circuit using the cascade system, Design and draw a circuit using th...

Design and draw a circuit using the cascade system to operate two cylinders (A and B) which, on the operation of a start valve, produces the sequence A - B + B - A+. The cylinder

Strain gauge bridge circuit, Explain kinds of strain gauge bridge circuits ...

Explain kinds of strain gauge bridge circuits and resistance strain gauges.

V-i characteristics - power semiconductor devices, V- I Characteristics ...

V- I Characteristics When the peak  value of  applied  voltage is less than the break over   voltage  of triac  and no signal  is applied to the triac  it will block  both  pos

How many simultaneous calls can be made during peak time, Q. In a hundred-...

Q. In a hundred-line exchange 24 two-motion selectors are used. Draw schematic you suggest for this exchange and illustrate its working. How many simultaneous calls can be made du

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