QUESTIONS GRADED A+
● How many transistors do multivibrators have? Answer: 2
● The purpose of a multivibrator is to _______. Answer: convert DC
energy to square wave energy
● When transistors in a multivibrator is on, the output voltage is
_________. Answer: LOW
● Triggered multivibrators generate a square wave output Answer: only
when an external input is applied.
● In monostable multivibrators, the output of Q2 is fed back through the
________. Answer: resistor to the input of Q1
● In multivibrator feedback circuits, how are the transistors connected?
Answer: Q1 output to Q2 input and Q2 output to Q1 input
● Multivibrator frequency is determined by ___________. Answer: the
components in the feedback circuit.
, ● In an astable multivibrator, what determines which transistor turns ON
when power is first applied? Answer: The transistor that conducts first
● In an astable multivibrator, with Q1 ON Q2 is turned on by
____________. Answer: C1 Charging
● When Q2 turns ON, Q1 is turned OFF by ________. Answer: C2
Discharging
● In this astable multivibrator, what component is the collector load
resistor for Q2? Answer: R4
● In this astable multivibrator, what component is the base biasing
resistor for Q1? Answer: R3
● In this multivibrator, the purpose of R6 is ____________. Answer:
symmetry control
● The frequency of this astable multivibrator is ___________. Answer:
1.26 kHz
● In this astable multivibrator, the purpose of C1, C2, R2, R4, and D2 is
____________. Answer: External synchronizing.