A class C amplifier:

A class C amplifier:

• A. Has an output for the entire input signal cycle
• B. Output is present for less than 180 degrees of the input cycle
• C. Bias is set well beyond cutoff
• D. Both B and C

Answer: (D)

A class C amplifier is characterized by its operation in which the output is present for less than 180 degrees of the input cycle. This type of amplifier is designed to handle high-frequency signals and achieve high efficiency. The biasing of a class C amplifier is set well beyond cutoff, meaning that the transistor is not conducting for the entire input waveform. Instead, it is biased in such a way that it only allows current to flow during a small portion of the input cycle, approximately less than 180 degrees. This method of operation results in an amplifier that is efficient in delivering power to a load while minimizing the time the transistor spends in conducting mode, thereby reducing power loss. Therefore, both the conditions of the output being present for less than half the input cycle and the biasing being set well beyond cut-off are essential characteristics that define a class C amplifier. These features combine to give class C amplifiers their distinctive operational properties, specifically suited for applications like RF transmission where power efficiency is crucial.

A class C amplifier is characterized by its operation in which the output is present for less than 180 degrees of the input cycle. This type of amplifier is designed to handle high-frequency signals and achieve high efficiency. The biasing of a class C amplifier is set well beyond cutoff, meaning that the transistor is not conducting for the entire input waveform. Instead, it is biased in such a way that it only allows current to flow during a small portion of the input cycle, approximately less than 180 degrees.

This method of operation results in an amplifier that is efficient in delivering power to a load while minimizing the time the transistor spends in conducting mode, thereby reducing power loss. Therefore, both the conditions of the output being present for less than half the input cycle and the biasing being set well beyond cut-off are essential characteristics that define a class C amplifier. These features combine to give class C amplifiers their distinctive operational properties, specifically suited for applications like RF transmission where power efficiency is crucial.