Zero Crossing Detector (Inverting)

A zero crossing detector or ZCD is one type of voltage comparator, used to detect a sine waveform transition from positive and negative, that coincides when the i/p crosses the zero voltage condition.In the following section we will be looking into Inverting ZCD.

Working of zero crossing detector (Inv) circuit

• Working of ZCD can be easily understood if you know the working of a basic Inverting opamp comparator.

• The positive terminal is grounded.

• The output is driven into –Vsat when the input signal passes through zero to positive direction.

• Conversely, when input signal passes through zero to negative direction, the output switches to +Vsat.

Output of ZCD(Inv)