Explanation: The equation of duty cycle, D= R2/(R1 + R2). If R1 is made equal to R2 then 50% duty cycle is achieved. 6. How to obtain symmetrical waveform in Astable multivibrator?
A. Use clocked RS flip-flop
B. Use clocked JK flip-flop
C. Use clocked D-flip-flop
D. Use clocked T-flip-flop
Answer:A
Explanation: The equation of duty cycle, D= R2/(R1 + R2). If R1 is made equal to R2 then 50% duty cycle is achieved. 6. How to obtain symmetrical waveform in Astable multivibrator?
A. Use clocked RS flip-flop B. Use clocked JK flip-flop C. Use clocked D-flip-flop D. Use clocked T-flip-flop
Explanation: Symmetrical square wave can be obtained by adding a clocked JK flip-flop to the output of Astable multivibrator. The clocked flip-flop acts as a binary divider to the times output and produces 50% duty cycle without any restriction on the choice of resistors. 7. Determine the output frequency of the circuit.