A bistable multivibrator implemented as a comparator with hysteresis.

In this configuration, the hysteresis curve is non-inverting (i.e., very negative inputs correspond to a negative output and very positive inputs correspond to a positive output), and the switching thresholds are formula_60 where formula_61 is the greatest output magnitude of the operational amplifier.

Alternatively, the input and the ground may be swapped. In this configuration, the hysteresis curve is inverting (i.e., very negative inputs correspond to a positive output and vice versa), and the switching thresholds are formula_62. Such a configuration is used in the relaxation oscillator shown below.

वोल्टेज अनुगामी (Voltage follower)
Precision rectifier
स्क्मिट ट्रिगर (Schmitt trigger)
ऋणात्मक प्रतिबाधा परिवर्तक (Negative impedance converter (NIC))