Home / Single Stage Transistor Amplifiers – Notes – 1

Single Stage Transistor Amplifiers – Notes – 1

1. There are four classes of amplifier operations : Class A, Class AB, Class B, and Class C. 

2.  Class A amplifiers operate entirely in the active region and thus the output if a faithful reproduction of the input signal with some amplification. In a Class A amplifier the efficiency is very low. Class A amplifiers are usedfor audio and frequency amplification.

3. Class AB amplifiers are biased so that the collector current is cutoff for a portion of one cycle of the input and so the efficiency is higher than that of a Class A amplifier. Class AB amplifiers are normally used as push−pull amplifiers to alleviate the crossover distortion of Class B amplifiers. 

4. Class B amplifiers are biased so that the collector current is cutoff during one−half of the input signal. Therefore, the efficiency in a Class B amplifier is higher than that of a Class AB amplifier. Class B amplifiers are used in amplifiers requiring high power output.

5. Class C amplifiers are biased so that the collector current flows for less than one−half cycle of the input signal. Class C amplifiers have the highest efficiency and are used for radio frequency amplification in transmitters.

170447952016-03-17_5-42-5457
Figure-1 : Output signals for Class A, Class B, Class AB, and Class C amplifiers

Single Stage Transistor Amplifiers – Mcq
Single Stage Transistor Amplifiers – Notes
Single Stage Transistor Amplifiers – IQ

General Knowledge Books

Be a Part of the New & Next

MCQs fb  MCQs G+

Share the Knowledge

MORE INFORMATION
GATE Total InfoGATE 2019 BooksFree Notes
IES Total InfoIES 2019 BooksFree Mock tests
JAM Total InfoJAM 2019 BooksEngg Diploma
PSUs Total InfoM Tech Total InfoUGC NET Total Info

Leave a Reply

Your email address will not be published. Required fields are marked *

Copy Protected by Chetan's WP-Copyprotect.