Quiz on Small Signal Amplifiers

What is the primary function of a small signal amplifier?

• To amplify large signals

• To switch signals on and off

• To amplify low amplitude AC signals

• To rectify AC signals

What is the main purpose of a coupling capacitor in an amplifier circuit?

• To increase gain

• To block DC and allow AC signals

• To provide biasing

• To stabilize voltage

Why is a bypass capacitor used in a common emitter amplifier?

• To block AC signals

• To increase input impedance

• To bypass AC around the emitter resistor

• To reduce power consumption

In the DC equivalent circuit of a BJT amplifier, what is the role of capacitors?

• They act as short circuits

• They are replaced by open circuits

• They amplify the signal

• They provide feedback

In DC analysis of a BJT amplifier, which of the following is typically calculated?

• AC gain

• Frequency response

• Operating point (Q-point)

• Output impedance

In the AC equivalent circuit, what happens to the DC power supply?

• It is replaced by a short circuit

• It is replaced by an open circuit

• It is retained as is

• It is replaced by a resistor

What defines the bandwidth of an amplifier?

• The range of DC voltages it can handle

• The range of frequencies over which gain is constant

• The maximum output voltage

• The input resistance

What is another name for a Common Collector (CC) amplifier?

• Voltage amplifier

• Emitter follower

• Current amplifier

• Base follower

In a CC amplifier, the voltage gain is approximately:

• Greater than 1

• Equal to 1

• Less than 1

• Zero

In a common base configuration, the input is applied to:

• Base

• Collector

• Emitter

• Ground