Power Transistor

The output stage of a multistage amplifier is also called

• mixer stage

• power stage

• detector stage

• current stage

.......... coupling is generally employed in power amplifiers.

• Direct

• RC

• Transformer

• Impedance

Class ....... power amplifier has the highest collector efficiency.

• C

• AB

• B

• A

Power amplifiers handle ....... signals compared to voltage amplifiers.

• small

• very-small

• large

• all of the above

Class C amplifiers are used as .........

• AF amplifiers

• RF amplifiers

• modulators

• detectors

A 2-transistor class B power amplifier is commonly called ........ amplifier.

• dual

• push-pull

• symmetrical

• differential

If a transistor is operated in such a way that output current flows for 60º of the input signal, then it is ...... operation.

• Class-A

• Class-B

• Class-AB

• Class-C

Class .......... operation gives the maximum distortion.

• A

• B

• C

• AB

The size of a power transistor is made considerably large to ........

• provide easy handling

• dissipate heat

• facilitate connections

• increase its efficiency

The most important consideration in power amplifiers is......

(i) biasing the circuit

(ii) collector efficiency

(iii) to keep the transformer cool

• biasing the circuit

• collector efficiency

• to keep the transformer cool

• power gain