What are transistor amplifiers, Electrical Engineering

Assignment Help:

Q. What are transistor amplifiers? What is meant by efficiency of an amplifier? What is amplifier coupling?

The AMPLIFIER is a device that enables an input signal to control an output signal. The output signal will have some (or all) of the characteristics of the input signal but will generally be larger than the input signal in terms of voltage, current, or power. A transistor amplifier is a current-control device. The current in the base of the transistor (which is dependent on the emitter-base bias) controls the current in the collector.

Once current is controlled it can be used to give a voltage gain or a power gain. The efficiency of an amplifier refers to the amount of power delivered to the output compared to the power supplied to the circuit. Since every device takes power to operate, if the amplifier operates for 360° of input signal, it uses more power than if it only operates for 180° of input signal. If the amplifier uses more power, less power is available for the output signal and efficiency is lower. Since class A amplifiers operate (have current flow) for 360° of input signal, they are low in efficiency.


Related Discussions:- What are transistor amplifiers

Speech Timer, Speech timer where max time is 5 minutes Use the switche...

Speech timer where max time is 5 minutes Use the switches for: start switch reset switch use the lights to represent: the “green” light meaning the

Give the properties of pvc, Give the properties of PVC. PVC- It is acqu...

Give the properties of PVC. PVC- It is acquired from polymerisation of hydrogen chloride and acetylene in the presence of a catalyst as peroxides at about 50 0 C. Properties

..analong course design, Askhigh precision linear amplifier question #Mini...

Askhigh precision linear amplifier question #Minimum 100 words accepted#

Basic aspects of electromechanical energy converters, Q. Basic aspects of e...

Q. Basic aspects of electromechanical energy converters? Whereas detailed differences and particularly challenging problems emerge among various machine types, this section bri

What is ohmmeter, What is ohmmeter An ohmmeter is an instrument for mea...

What is ohmmeter An ohmmeter is an instrument for measuring resistance

Carthode ray oscilloscope, with a simple circuit,explain the construction o...

with a simple circuit,explain the construction of Direct Reading Probe of a cathode ray oscilloscope

Energy stored in the capacitor when it is fully charged, An 12µF capacitor ...

An 12µF capacitor is connected in series to a 0.5M? resistor across the dc voltage supply of 240V. verify: (a)  Time constant (b)  Initial charging current (c)  Time fo

Configured the dual processor architecture, Configured dual processor archi...

Configured dual processor architecture  In centralized SPC, dual processor architecture can be configured to operate in following one of three modes: 1.  Standby mode: In

What do you mean by exponent, Q. What do you mean by Exponent? The expo...

Q. What do you mean by Exponent? The exponent field needs to represent both negative and positive exponents. To perform this, a bias is added to the actual exponent in order

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