Differentiate between class A and class C power amplifiers with respect to CKT diagram, operating cycle and power efficiency.

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written 5.6 years ago by

teamques10 ★ 68k

modified 2.7 years ago by

binitamayekar ★ 6.6k

power electronics

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written 2.7 years ago by

sagarkolekar ★ 11k

Class A Power amplifier.

1. Circuit diagram.

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2. Position of Q-point : At the center of dc 1 outline.

3. Operating cycle: Circuit operates for entire 360˚ of input signal.

4. Power efficiency: Maximum efficiency (for series fed ) = 25%

Maximum efficiency for transformer coupled = 50%

Class C Power Amplifier.

1. Circuit diagram.

enter image description here

2. Position of Q-point : Below the cut off region of operation.

3. Operating cycle : Circuit operates for less than 180˚ of input signal.

4. Power efficiency : Around 95% for class C power amplifier.

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