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

Commercial losses in electrical systems, Commercial Losses in Electrical Sy...

Commercial Losses in Electrical Systems Commercial losses are caused by pilferage, theft, defective meters, and errors in meter reading and in estimating un-metered supply of

Compute product of inductance and capacitance, Q. The inductance per unit l...

Q. The inductance per unit length in H/m for parallel-plate infinitely long conductors in air is given by L = µ 0 d/w = 4π×10 -7 d/w, where d and w are inmeters. Compute L (per un

Define the signals in time domain, Define the Signals in Time Domain? T...

Define the Signals in Time Domain? The time domain is the type of visualization that most people are familiar with. This method shows variations of a signal with time. The most

Load stack pointer - stack operations , Load Stack Pointer This  inst...

Load Stack Pointer This  instruction loads the stack  pointer  register with the 16 - bit  data specified in the   instruction. The 16 - bit  data. When  stored in sp  registe

Determine the armature e.m.f. and load angle of generator, A 3-phase, wye-c...

A 3-phase, wye-connected, 11 kV, 137.5 MVA turbo-alternator of 0.8 power factor lagging has a synchronous reactance XS = 1.4 Ω. Assume the machine to be ideal for convenience of an

Determine the remaining voltages and currents, Q. Some element voltages and...

Q. Some element voltages and currents are given in the network configuration of Figure. Determine the remaining voltages and currents. Also calculate the power delivered to each el

Wien bridge, How i prepare a wien bridge for my college assignemen?

How i prepare a wien bridge for my college assignemen?

Jfet common drain amplifier, Q. JFET Common Drain Amplifier? The common...

Q. JFET Common Drain Amplifier? The common drain FET amplifier is similar to the common collector configuration of the bipolar transistor. A general common drain JFET amplifier

Find out the low-frequency voltage gain, Design a differential amplifier wi...

Design a differential amplifier with active current mirror load in Cadence using TSMC 0.35 micron process. The power supply voltage is 3.3V. A 10µA current reference is available

Explain cellular telephone systems, Q. Explain Cellular Telephone Systems? ...

Q. Explain Cellular Telephone Systems? Today radio-based systems make it possible for mobile people to communicate via cellular telephone systems while traveling on airplanes a

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