Define Class A, Class B, Class C power amplifiers.

1.	Define Class A, Class B, Class C power amplifiers.
Answer» (i) Class A power amplifier: The Q point is located exactly at the centre of the load line. The current flows for full cycle of input signal. (ii) Class B power amplifier: The Q point is located in between X-axis and the centre of load line. The output current flows for more than half cycle and less than full cycle of the input signal. (iii) Class C power amplifier: The Q point is located beyond cut off region below the X-axis. The output current flows for less than half cycle of input signal.

Answer»

(i) Class A power amplifier: The Q point is located exactly at the centre of the load line. The current flows for full cycle of input signal.

(ii) Class B power amplifier: The Q point is located in between X-axis and the centre of load line. The output current flows for more than half cycle and less than full cycle of the input signal.

(iii) Class C power amplifier: The Q point is located beyond cut off region below the X-axis. The output current flows for less than half cycle of input signal.

Discussion

No Comment Found

Related InterviewSolutions

What is an amplifier?
What is faithful amplification?
Compare different types of coupling of amplifiers?
Compare on the CB, CE and CC amplifiers.
Which of the three types of amplifiers is best suited for low input impedance and high output impedance?
Write any two applications of CC amplifier?
Why do we avoid RC and transformer coupling for very high and very low frequencies?
What are the functions of input and output coupling capacitors?
Why do we prefer to express the gain in decibel?
What is the necessity of cascading?