Amplifier, Electrical Engineering


Usually, an amplifier or simply amp, is any device which changes, generally increases, the amplitude of a signal. The connection of the input to the output of an amplifier-generally expressed as a function of the input frequency-is termed as the transfer function of the amplifier, and magnitude of transfer function is called the gain.

In common use, the term generally explains an electronic amplifier, where the input "signal" is generally a voltage or a current. In audio applications, amplifiers drive the loudspeakers employed in PA systems to create the human voice louder or play recorded music. Amplifiers may be categorized as per to the input (source) they are designed to amplify (likes a guitar amplifier, to perform with an electric guitar), the device they are intended to drive (like a headphone amplifier), the frequency range of the signals (Audio, IF, RF, and VHF amplifiers, for instance), whether they invert the signal (inverting amplifiers and non-inverting amplifiers), or the sort of device employed in the amplification (valve or tube amplifiers, FET amplifiers).

A related device which emphasizes conversion of signals of one type to another (for instance, a light signal in photons to a DC signal in amperes) is a transducer, a transformer, or a sensor.

Posted Date: 1/11/2013 1:48:51 AM | Location : United States

Related Discussions:- Amplifier, Assignment Help, Ask Question on Amplifier, Get Answer, Expert's Help, Amplifier Discussions

Write discussion on Amplifier
Your posts are moderated
Related Questions

Q. Explain about Stored Program Control? Stored Program Control:   In centralized control, all control equipment is replaced by a single processor which should be quite powerf

Illustrate about the Digital televisions Microprocessor would be used to control the below features, for instance: - Automatically tuning into television stations - allow

Explain explanatory notes on A/D conversion. The digital inventory is working a revolution into the field of microcontrollers, technology and microprocessors are used more effi

History - Field-Effect Transistor: The principle of field-effect transistors was very first patented by Julius Edgar Lilienfeld in the year 1925 and by Oskar Heil in the year

Consider the circuit shown in Figure in the t -domain as well as in the s-domain. Formulate the s-domain nodal equations and use MATLAB to solve for V A (s) and V B (s).

What current must flow if 0.45 coulombs is to be transferred in 5 ms? Quantity of electricity, Q = It, then:

Why maximum power output is given by a machine at an efficiency of 50 percent?

Q. Analyze the 2-bit R-2R ladder-network D/A converter, and corresponding to binary 01, 10, and 11, obtain the equivalent circuits and determine the analog output voltage as a frac

Explain RS232C Standard. RS232C: 1. Standard described for asynchronous communications where there is given timing among data bits and no fixed timing among the characters