Basic Op-Amp Circuits - Comparators

7 important questions on Basic Op-Amp Circuits - Comparators

A certain op-amp has an open-loop gain of 80,000. The maximum saturated output levels of this particular device are ±12 V when the dc supply voltages are ±15 V. If a differential volt age of 0.15 mV rms is applied between the inputs, what is the peak-to-peak value of the output?

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Determine the output level (maximum positive or maximum negative) for each comparator in Figure 13–60.

(a) Maximum negative
(b) Maximum positive
(c) Maximum negative

Calculate the V_UTP and V_LTP in Figure 13–61.
Vout(max) = ±10 V.

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What is the hysteresis voltage in Figure 13–61?

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Draw the output voltage waveform for each circuit in Figure 13–62 with respect to the input. Show voltage levels.

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Determine the hysteresis voltage for each comparator in Figure 13–63. The maximum output levels are ±11 V.

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A 6.2 V zener diode is connected from the output to the inverting input in Figure 13–61 with the cathode at the output. What are the positive and negative output levels?

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