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

Factors that influence choice of carrier frequency, 1. Why must a modem be ...

1. Why must a modem be used to transmit binary data through a PSTN? (1) Use sketches and additional text to describe the following modulation methods. (a) Amplitude shift key

.voltmeter, circuit diagram,working and construction of voltmeter

circuit diagram,working and construction of voltmeter

Explain the synchronous compensators, Explain the Synchronous Compensators ...

Explain the Synchronous Compensators These are synchronous motors running without mechanical loads (or with load if required). Similar to the synchronous generators, they can a

Junctions and diodes, An intrinsic semiconductor at room temperature has fr...

An intrinsic semiconductor at room temperature has free electrons

Obtain the value of rs, Consider and obtain the values for R S , R 2 , R 1 ...

Consider and obtain the values for R S , R 2 , R 1 , and R D . Apply the rule-of-thumb dc design procedure outlined in this section for a JFET with V P = 3V, I DSS = 20 mA, and a

Find percent error of both meters when measuring a current, Q. Error specif...

Q. Error specifications on a 10-A digital ammeter are given as 0.07% of the reading, 0.05% of full scale, 0.005% of the reading per degree Celsius, and 0.002% of full scale per deg

Electrical machine, Design a suitable double –layer lap winding for a 6-pol...

Design a suitable double –layer lap winding for a 6-pole dc armature with 18 slots and two coil sides per slot. Give values of front-pitch, brack–pitch and commutator pitch. Draw t

Determine voltage ratio for the circuit, Q. Determine v o /v i for the ci...

Q. Determine v o /v i for the circuit shown in Figure if the op amps are ideal.

Compute the minimum line current for the motor, A three-phase, wye-connecte...

A three-phase, wye-connected, four-pole, 400- V, 60-Hz, 15-hp synchronous motor has a synchronous reactance of 3  per phase and negligible armature resistance. The data for its no

Nonsalient-pole rotor construction, Q. Nonsalient-pole rotor construction? ...

Q. Nonsalient-pole rotor construction? The nonsalient-pole (smooth or cylindrical) rotor construction is preferred for high-speed turbine-driven alternators (known also as turb

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