Explain about transistor amplifiers, Electrical Engineering

Assignment Help:

Q. Explain about Transistor Amplifiers?

Amplifiers are circuits that produce an output signal which is larger than, but proportional to, an input signal. The input and output signals can be both voltages or currents, or one or the other, as in voltage-in current-out and current-in voltage-out amplifiers. The amplifier gain is just the network's transfer function, which is the ratio of output-to-input complex signals in the frequency domain as found by complex analysis.

Amplifiers find extensive use in instrumentation applications. Sometimes, amplifiers are used for reasons other than gain alone. An amplifier may be designed to have high input impedance so that it does not affect the output of a sensor while at the same time giving a low output impedance so that it can drive large currents into its load, such as a lamp or heating element. In some other applications, an amplifier with a low input impedance might be desirable.

The first step in designing or analyzing any amplifier is to consider the biasing. The biasing network consists of the power supply and the passive circuit elements surrounding the transistor that provide the correct dc levels at the terminals. This is known as setting the Q point (quiescent or operating point) with no signal applied. A good bias circuit must not only establish the correct dc levels, but must maintain them in spite of changes in temperature, variations in transistor characteristics, or any other sources of variation.


Related Discussions:- Explain about transistor amplifiers

What is the function performed by sim instruction in 8085, What is  the fu...

What is  the function performed by SIM instruction in 8085? SIM -Set Interrupt Mask. This instruction masks the interrupts as desired .it also sends out serial data by the seri

Magnet, Magnetic materials

Magnetic materials

What are the precautions to be taken, What are the precautions to be taken ...

What are the precautions to be taken before basic work on electrical installations? Ans: Before starting any electrical works on installations disconnect the power supply to

Linear components, A linear circuit component is one that has a linear I V ...

A linear circuit component is one that has a linear I V characteristic

Shunt motor, if the shunt motor has reduce as half load then what effect on...

if the shunt motor has reduce as half load then what effect on speed

Transistor voltmeter, \ Transistor voltmeter (TVM) : a simple diagram of ...

\ Transistor voltmeter (TVM) : a simple diagram of TVM using two transistors in the bridge configuration is as shown. TVM is provided by using transistor bridge circuits. In b

Ujt as relaxation oscillator, UJT as relaxation oscillator: The UJT re...

UJT as relaxation oscillator: The UJT relaxation oscillator is shown in fig. it consist of a UJT and a capacitor C which is charged through a variable resistance R when VBB is

Explain basic principle of linear sweep voltage generator, Q. Explain the b...

Q. Explain the basic principle of linear sweep voltage generator A linear time base generator or sweep generator is one that provides an output waveform, a portion of which exh

Define the term assembler directives, Define the term assembler directives....

Define the term assembler directives. An assembler directive is a statement to provide direction to the assembler to perform the function of assembly process. The assembler di

Common-emitter configuration, Common-emitter configuration: The commo...

Common-emitter configuration: The common-emitter that is abbreviated as CE transistor configuration is displayed in figure.  The transistor terminal common to both the input

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