Compare zero crossing detector with schmitt trigger circuit.
|Zero Crossing Detector||Schmitt trigger circuit|
|It has only one reference voltage i.e zero volts.||It has two reference voltage,UTP and LTP.|
|The input voltage is applied to inverting terminal and fixed voltage i.e zero volts to non-inverting terminal and vice versa.||The time varying input voltage is applied to the inverting input and the feedback voltage to the non-inverting input.|
|It is open,loop system.||It is closed loop system.|
|It does not exhibits hysteresis.||Schmitt trigger has hysteresis characteristics.|
|It is used as level detector, phase detector.||It is used as a wave shaping circuit, level detector and pulse-height discriminator. Its main use is to convert any kind of wave intosquare wave.|
|In this transition occur at only one level.||In this transition occur at two level.|