Explanation:In a positive clipper, the diode conducts until Vin = Vref (during the positive half cycle of the input), because when Vin < Vref, the voltage (Vref) at the negative input is higher than that at the positive input. 4. What happens if the potentiometer Rp is connected to negative supply?
A. Output waveform below -Vref will be clipped off
B. Output waveform above +Vref will be clipped off
C. Output waveform above -Vref will be clipped off
D. Output waveform below +Vref will be clipped off
Answer:A
Explanation:In a positive clipper, the diode conducts until Vin = Vref (during the positive half cycle of the input), because when Vin < Vref, the voltage (Vref) at the negative input is higher than that at the positive input. 4. What happens if the potentiometer Rp is connected to negative supply?
A. Output waveform below -Vref will be clipped off B. Output waveform above +Vref will be clipped off C. Output waveform above -Vref will be clipped off D. Output waveform below +Vref will be clipped off
Explanation: If the potentiometer Rp is connected to negative supply -VEE instead of +VCC, the reference voltage Vref will be negative. As a result the entire output waveform above -Vref to be clipped off. 5. Find the output waveform for when Vin < Vref