Comparator

Comarator a device which compares two voltages or currents and switches its output to indicate which is larger.

Comparator with hysteresis

Hysteresis is achieved by positive feedback and makes the comparator less sensitive to noise on the input.

VHYS = V2 – V’2 V2 = R2 R2 + R1 V2 = R2 R2 + R1

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