Merits and demerits of collector-to-base bias, Electrical Engineering

Assignment Help:

Merits and Demerits of Collector-to-base bias:

Merits:

In this type of circuit the circuit stabilizes the operating point against differences in temperature and β (that is replacement of transistor)

Demerits:

In this type of circuit, to keep Ic independent of β, the subsequent condition must be met:

Ic = βIb = β(Vcc - Vbe)/ Rb + Rc + βRc ≈ (Vcc - Vbe) / Rc

This is the case while

βRc >> Rb

As β-value is set (and usually not known) for a given transistor, this relation can be satisfied either through keeping Rc fairly large or making Rb very low.

If Rc is large, a high Vcc is essential that increases cost also precautions are essential while handling.

The reverse bias of the collector-base region is small If Rb is low that limits the range of collector voltage swing which leaves the transistor in active mode.

The resistor Rb causes an AC feedback, decreasing the voltage gain of the amplifier. This not desirable effect is a trade-off for greater Q-point stability.


Related Discussions:- Merits and demerits of collector-to-base bias

Insulation resistance, how can we increase insulation resistance of sheet

how can we increase insulation resistance of sheet

Design and build a circuit board, Devise a "green" design to improve the el...

Devise a "green" design to improve the electrical plan of a room in your home. How might you reduce electricity use in your home. Initiate and plan 1. Select two rooms in y

Electric current vs magnetic field, When a current is passed through a cond...

When a current is passed through a conductor, a magnetic field is created in its surroundings. We can represent this magnetic field by drawing 'field (or 'flux') lines' with two

Dc machince, what ''s part of dcmotor or dc generator

what ''s part of dcmotor or dc generator

Crt and cro, working principle of crtand block diagram of cro

working principle of crtand block diagram of cro

Field-effect transistor, Field-Effect Transistor: The field-effect tra...

Field-Effect Transistor: The field-effect transistor that is abbreviated as FET relies on an electric field to control the shape and therefore the conductivity of a channel of

Explain about for loop construct, Q. Explain about For Loop Construct? ...

Q. Explain about For Loop Construct? The loop build causes the for loop to be splitted into portions and portions shared amongst threads in team. The syntax of loop construct

High frequency induction heaters or magnetic fields, High Frequency Inducti...

High Frequency Induction Heaters or Magnetic Fields : If this type of equipment is in use, large currents may be induced in any nearby metallic object or circuit, which will in tu

Clc filter, CLC or π Filter The above diagram displays CLC or π ty...

CLC or π Filter The above diagram displays CLC or π type filter, which mainly contains a capacitor filter, followed through LC section. This filter offers a quite smooth o

Illustrate process characterics of ultrasonic machining, Discribe the ultra...

Discribe the ultrasonic machining with main emphasis on the following (a) Basic working Principle and machining set up (b) Accuracy and surface complete on work materials

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