1. How is the square wave output generated in op-amp?
A. Op-amp is forced to operate in the positive saturation region
B. Op-amp is forced to operate in the negative saturation region
C. Op-amp is forced to operate between positive and negative saturation region
D. None of the mentioned
2. The following circuit represents a square wave generator. Determine its output voltage
A. -13 v
B. +13 v
C. ± 13 v
D. None of the mentioned
3. Determine the expression for time period of a square wave generator
A. T= 2RC ln×[( R1+ R2) / ( R2)].
B. T= 2RC ln×[( 2R1+ R2) / ( R2)].
C. T= 2RC ln×[( R1+ 2R2) / ( R2)].
D. T= 2RC ln×[( R1+ R2) / (2 R2)].
4. What will be the frequency of the output waveform of a square wave generator if R2 = 1.16 R1?
A. fo = (1/2RC.
B. fo = (ln/2RC.
C. fo = (ln /2 ×√RC.
D. fo = (ln/√(2 RC.)
5. What could be the possible output waveform for a free-running multivibrator whose op-amp has a supply voltage of ±5v operating at 5khz?
6. Determine the output frequency for the circuit given below
A. 28.77 Hz
B. 31.97 Hz
C. 35.52 Hz
D. 39.47 Hz
7. The value of series resistance in the square wave generator should be 100kΩ or higher to
A. Prevent excessive differential current flow
B. Increase resistivity of the circuit
C. Reduce output offset voltage
D. All of the mentioned
8. Why Zener diode is used at the output terminal of the square wave generator?
A. To reduce both output and capacitor voltage swing
B. To reduce output voltage swing
C. To reduce input voltage swing
D. To reduce capacitor voltage swing
9. A square wave oscillator has fo =1khz. Assume the resistor value to be 10kΩ and find the capacitor value?
A. 3.9 µF
B. 0.3 µF
C. 2 µF
D. 0.05µF
10. How a triangular wave generator is derived from a square wave generator?
A. Connect the oscillator at the output
B. Connect the Voltage follower at the output
C. Connect differential at the output
D. Connect integrator at the output