ATT WEEK 7 QUESTIONS WITH COMPLETE SOLUTIONS.
What is the purpose of multivibrators? - (ANSWER)Changes DC operating voltage to sqaure waves.
What are multivibrators made of? - (ANSWER)2 transistors and a feedback circuit
Free running Multivibrators generate a square wave output.... - (ANSWER)Anytime the operating voltage
is applied.
Triggered multivibrators produce a square wave... - (ANSWER)When an external input is applied.
The type of multivibrator circuit depends on... - (ANSWER)The feedback circuit components
An astable multivibrator has no... - (ANSWER)Stable state condition, it is free running
A monostable multivibrator has... - (ANSWER)One stable state, it is triggered
A bistable multivibrator has... - (ANSWER)Two stable states, it is triggered
A stable state is... - (ANSWER)A steady condition(output stays the same)
What happens when power is applied in an Astable Multivibrator? - (ANSWER)Q1 and Q2 switch
between on or off.
What happens to Q1 and Q2 in a monostable multivibrator? - (ANSWER)Q2 is on, Input pulse causes Q2
to turn off and Q1 to turn on
A transistor in a multivibrator is on in ____________ - (ANSWER)Saturation
A transistor in a multivibrator is off in __________ - (ANSWER)Cutoff
1
, ATT WEEK 7 QUESTIONS WITH COMPLETE SOLUTIONS.
What happens to Q1 and Q2 in a bistable multivibrator? - (ANSWER)Either Q1 or Q2 could be on, input
pulse causes either to turn off and the other to turn on.
How is an Astable multivibrator identified? - (ANSWER)Two capacitors in the feedback circuit.
How is a monostable multivibrator identified? - (ANSWER)One capacitor and one resistor in the
feedback circuit.
How is a bistable multivibrator identified? - (ANSWER)Two capacitors and two resistors in feedback
circuit.
What is the purpose of R1 in an Astable Multivibrator Circuit? - (ANSWER)Collector Load Resistor
What is the purpose of R3 in an Astable Multivibrator Circuit? - (ANSWER)Base bias resistor for Q1
What is the purpose of R2 in an Astable Multivibrator Circuit? - (ANSWER)Base bias resistor for Q2
What is the purpose of R4 in an Astable Multivibrator Circuit? - (ANSWER)Collector load resistor for Q2
What are the outputs of Q1 and Q2 in an Astable Multivibrator Circuit? - (ANSWER)180° out of phase
What is the purpose of R5 in an Astable Multivibrator Circuit? - (ANSWER)Adjusts Symmetry of the
output waveform.
What is the purpose of D1 and D2 in an Astable Multivibrator Circuit? - (ANSWER)Prevents slow rise
times.
2
What is the purpose of multivibrators? - (ANSWER)Changes DC operating voltage to sqaure waves.
What are multivibrators made of? - (ANSWER)2 transistors and a feedback circuit
Free running Multivibrators generate a square wave output.... - (ANSWER)Anytime the operating voltage
is applied.
Triggered multivibrators produce a square wave... - (ANSWER)When an external input is applied.
The type of multivibrator circuit depends on... - (ANSWER)The feedback circuit components
An astable multivibrator has no... - (ANSWER)Stable state condition, it is free running
A monostable multivibrator has... - (ANSWER)One stable state, it is triggered
A bistable multivibrator has... - (ANSWER)Two stable states, it is triggered
A stable state is... - (ANSWER)A steady condition(output stays the same)
What happens when power is applied in an Astable Multivibrator? - (ANSWER)Q1 and Q2 switch
between on or off.
What happens to Q1 and Q2 in a monostable multivibrator? - (ANSWER)Q2 is on, Input pulse causes Q2
to turn off and Q1 to turn on
A transistor in a multivibrator is on in ____________ - (ANSWER)Saturation
A transistor in a multivibrator is off in __________ - (ANSWER)Cutoff
1
, ATT WEEK 7 QUESTIONS WITH COMPLETE SOLUTIONS.
What happens to Q1 and Q2 in a bistable multivibrator? - (ANSWER)Either Q1 or Q2 could be on, input
pulse causes either to turn off and the other to turn on.
How is an Astable multivibrator identified? - (ANSWER)Two capacitors in the feedback circuit.
How is a monostable multivibrator identified? - (ANSWER)One capacitor and one resistor in the
feedback circuit.
How is a bistable multivibrator identified? - (ANSWER)Two capacitors and two resistors in feedback
circuit.
What is the purpose of R1 in an Astable Multivibrator Circuit? - (ANSWER)Collector Load Resistor
What is the purpose of R3 in an Astable Multivibrator Circuit? - (ANSWER)Base bias resistor for Q1
What is the purpose of R2 in an Astable Multivibrator Circuit? - (ANSWER)Base bias resistor for Q2
What is the purpose of R4 in an Astable Multivibrator Circuit? - (ANSWER)Collector load resistor for Q2
What are the outputs of Q1 and Q2 in an Astable Multivibrator Circuit? - (ANSWER)180° out of phase
What is the purpose of R5 in an Astable Multivibrator Circuit? - (ANSWER)Adjusts Symmetry of the
output waveform.
What is the purpose of D1 and D2 in an Astable Multivibrator Circuit? - (ANSWER)Prevents slow rise
times.
2
