∴ Hysteresis voltage = VUT-VLT = 25-(-25) = 50mv. 7. How to limit the output voltage swing only to positive direction?
A. Combination of two zener diodes
B. Combination of zener and rectifier diode
C. All of the mentioned
D. Combination of two rectifier diodes
Answer:A
∴ Hysteresis voltage = VUT-VLT = 25-(-25) = 50mv. 7. How to limit the output voltage swing only to positive direction?
A. Combination of two zener diodes B. Combination of zener and rectifier diode C. All of the mentioned D. Combination of two rectifier diodes
Explanation: To limit the output voltage swing to positive or negative direction, the basic op-amp comparator should be connected with a combination of zener and rectifier diode in the feedback path. 8. For the circuit shown below, obtain output waveform. Assume zener voltage to be 4.78v and voltage drop across the forward biased zener to be 0.7v.