Explanation: When input voltage is higher than reference voltage, the op-amp operates in open loop and diode become reverse biased. Thus, the output voltage will be equal to reference voltage. 7. A positive small signal halfwave rectifier can
A. Rectify signals with peak value only
B. Rectify signals with value of few millivolts only
C. Rectify signals with both peak value and down to few millivolts
D. None of the mentioned
Answer:A
Explanation: When input voltage is higher than reference voltage, the op-amp operates in open loop and diode become reverse biased. Thus, the output voltage will be equal to reference voltage. 7. A positive small signal halfwave rectifier can
A. Rectify signals with peak value only B. Rectify signals with value of few millivolts only C. Rectify signals with both peak value and down to few millivolts D. None of the mentioned
Explanation: A positive small signal halfwave rectifier can rectify signals with peak values down to few millivolts, because the high open loop gain of the op-amp automatically adjusts the voltage drive to the diode, so that the rectified output peak is the same as the input.