Q1. Mixed Signals and Sensors

Which of the following is (are) power amplifiers?

• Class A

• Class B

• Class C

• All of the above

By how much does the output signal vary for a class AB power amplifier?

• 360°

• 180°

• Between 180° and 360°

• Less than 180°

Which type of power amplifier is biased for operation at less than 180º of the cycle?

• Class A

• Class B or AB

• Class C

• Class D

Which type of amplifier uses pulse (digital) signals in its operation?

• Class A

• Class B or AB

• Class C

• Class D

Which of the power amplifiers has the lowest overall efficiency?

• Class A

• Class B or AB

• Class C

• Class D

Which of the following describe(s) a power amplifier?

• It can handle large power.

• It can handle large current.

• It does not provide much voltage gain.

• All of the above

_______ amplifiers primarily provide sufficient power to an output load to drive a speaker from a few watts to tens of watts.

• Small-signal

• Power

• Large-signal

• None of the above

The main features of a large-signal amplifier is the circuit’s ________.

• power efficiency

• maximum power limitations

• impedance matching to the output device

• All of the above

Class AB operation is ________ operation.

• similar to class A

• similar to class B

• similar to class C

• None of the above

Which operation class is generally used in radio or communications?

• A

• B

• C

• D