Key Topic 37: Multivibrators

Question 1

3-37E1: The frequency of an AC signal can be divided electronically by what type of digital circuit?

A. Free-running multivibrator.
B. Bistable multivibrator.
C. OR gate.
D. Astable multivibrator.

Answer 1

B. Bistable multivibrator.

Question 2

3-37E2: What is an astable multivibrator?

A. A circuit that alternates between two stable states.
B. A circuit that alternates between a stable state and an unstable state.
C. A circuit set to block either a 0 pulse or a 1 pulse and pass the other.
D. A circuit that alternates between two unstable states.

Answer 2

D. A circuit that alternates between two unstable states.

Question 3

3-37E3: What is a monostable multivibrator?

A. A circuit that can be switched momentarily to the opposite binary state and then returns after a set time to its original state.
B. A “clock” circuit that produces a continuous square wave oscillating between 1 and 0.
C. A circuit designed to store on bit of data in either the 0 or the 1 configuration.
D. A circuit that maintains a constant output voltage, regardless of variations in the input voltage.

Answer 3

A. A circuit that can be switched momentarily to the opposite binary state and then returns after a set time to its original state.

Question 4

3-37E4: What is a bistable multivibrator circuit commonly named?

A. AND gate.
B. OR gate.
C. Clock.
D. Flip-flop.

Answer 4

D. Flip-flop.

Question 5

3-37E5: What is a bistable multivibrator circuit called.?

A. Flip-flop.
B. AND gate.
C. OR gate.
D. Clock.

Answer 5

A. Flip-flop.

Question 6

3-37E6: What wave form would appear on the voltage outputs at the collectors of an astable, multivibrator, common-emitter stage?

A. Sine wave.
B. Sawtooth wave.
C. Square wave.
D. Half-wave pulses.

Answer 6

C. Square wave