Bjt amplifiers, Electrical Engineering

Assignment Help:

Explain the working of BJT Amplifiers?

The purpose of electronic amplifiers is essentially to increase the amplitude and power of a signal so that either useful work is done or information processing is realized. The output signal power being greater than the input signal power, the additional power is supplied by the bias supply.

Thus, the amplifier action is one of energy conversion in which the bias power is converted to signal power within the device. A single-stage amplifier is one in which there is only one amplifying element. By combining several single-stage amplifier circuits, a multistage amplifier is produced. Audio amplifiers are designed to amplify signals in the frequency range of 30 to 15,000 Hz perceptible to the human ear. A video amplifier is designed to amplify the signal frequencies needed for television imaging (see Chapter 15). An amplifier, in general, is then made up of a cascade of several stages. A stage usually consists of an elementary amplifier, which normally has only one transistor. The cascade is formed by making the output of the first stage as the input of the second stage, the output of the second stage as the input of the third stage, and so on. This section is devoted to the study of three basic forms of amplifier stages which use a BJT.


Related Discussions:- Bjt amplifiers

Change management in power distribution, Change Management in Power Distrib...

Change Management in Power Distribution: Organisational change might be described as an organisation-wide effort to augment the effectiveness of an organisation through str

Charge variation with time, Q. A charge variation with time is given in Fig...

Q. A charge variation with time is given in Figure. Draw the corresponding current variation with time.

Pid controller design, PID controllers are popularly adopted in a wide rang...

PID controllers are popularly adopted in a wide range of industrial processes. The objective of this design practical is to study the way this PID controller changes system dynamic

Explain the construction and working of calomel electrode , 1.  Explain the...

1.  Explain the construction and working of Calomel electrode 2.  Derive an expression for the electrode potential of a glass electrode. 3.  What are ion selective electrodes

Name the various magnetically hard alloys, Name the various magnetically ha...

Name the various magnetically hard alloys. Several of the magnetically hard materials are rare earth carbon steel, cobalt, tungsten steel, alnico, hard ferrites and cobalt stee

Geographic information system, Geographic Information System: Geograph...

Geographic Information System: Geographic Information System (GIS) is a computer system capable of assembling, manipulating, storing, and displaying geographically referenced

Evaluate the four parameters of the hybrid model, Q. Show that any amplifie...

Q. Show that any amplifier represented by the model of Figure of the text can also be represented by themore general hybridmodel of Figure. Evaluate the four parameters of the hybr

Determine the motor current and speed, A dc series motor is connected to a ...

A dc series motor is connected to a load. The torque varies as the square of the speed.With the diverter-circuit open, the motor takes 20 A and runs at 500 r/min. Determine the mot

Power system model, #i have an error at in the Matlab power system model..t...

#i have an error at in the Matlab power system model..thus i couldn''t run it...

Oscillator circuit with the help of block diagram, Q. Explain the condition...

Q. Explain the conditions to be satisfied for sustained oscillations in an oscillator circuit with the help of block diagram. The essential condition for sustained oscillations

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