Quick Answer: How Does A Class A Amplifier Work?

It uses a single-ended transistor for its output stage with the resistive load connected directly to the Collector terminal.

A Class A amplifier stage passes the same load current even when no input signal is applied so large heatsinks are needed for the output transistors.

What is class A amplifier?

Class A Power Amplifiers. A Class A power amplifier is one in which the output current flows for the entire cycle of the AC input supply. Hence the complete signal present at the input is amplified at the output.

What is the main advantage of a class A amplifier?

Advantages of Class A power amplifier.

High fidelity because input signal will be exactly reproduced at the output. Since the active device is on full time, no time is required for the turn on and this improves high frequency response.20 Feb 2014

How does a class B amplifier work?

Class B amplifier is a type of power amplifier where the active device (transistor) conducts only for one half cycle of the input signal. That means the conduction angle is 180° for a Class B amplifier. The schematic of a single ended Class B amplifier and input , output waveforms are shown in the figure below.9 Jan 2014

What is the difference between a Class A and Class B amplifier?

Class A Amplifier. The main role of class-A bias is to keep amplifier free from distortion by keeping signal waveform out of the non-linear region which exists between 0V and 0.6V. The figure-1 depicts class A amplifier bias characteristics. Class A is used for low to medium power output stages.