Exam 33: Power Amplifiers

The distortion that occurs in a class B push-pull amplifier when the transistors are biased at cutoff is called

A circuit capable of delivering large amounts of power to a low impedance load is considered a(n)

The class of operation for an amplifier determines its power ______________.

The collector current of a transistor in a class A amplifier flows for 180° of the input waveform.

The maximum possible efficiency of an RC coupled class A amplifier cannot exceed what percentage no matter what is done?

The percent efficiency of any amplifier is defined as the percentage of the ac input power that is converted to useful dc power output.

Which of the following is not an advantage of using a split supply class B push-pull?

The higher frequencies in the output voltage of an amplifier are substantially affected by what capacitance?

By what capacitance are the higher frequencies in the output voltage of an amplifier substantially affected?

If the signal amplitude at the input of a class A amplifier is too large, either or both peaks of the output waveform will be ______________ or flattened.

Class C amplifiers are generally used in

The typical operation of a class C amplifier provides a collector current that flows for approximately 120° or less of the input cycle.

The collector current of a transistor in a class B amplifier flows for the full 360° of the input signal.

The percentage of the dc input power that is converted to useful ac power output is the

In a class A amplifier, the power dissipation in the transistor decreases when an ac signal is applied to the input.

What percentage cannot exceed the maximum possible efficiency of an RC coupled class A amplifier, no matter what is done?

In which amplifier class does the collector current flow for 120° or less of the input waveform?

A power amplifier is a circuit capable of delivering large amounts of power to a low impedance load.

By tuning an LC tank circuit to a harmonic of the input frequency, the tuned class C amplifiers can be used as

The ac voltage at the collector is capacitively coupled to the load resistor in an RC coupled amplifier.