R2

R4

VO

R5

R6

R3

V2

+

-

R1

VIN

D1

VCC

V1

19

LPV7215

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SNOSAI6J – SEPTEMBER 2005 – REVISED AUGUST 2016

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Device Functional Modes (continued)

Figure 35. Zero Crossing Detector With Positive Feedback

7.4.7 Threshold Detector

Instead of tying the inverting input to 0 V, the inverting input can be tied to a reference voltage. As the input on

the noninverting input passes the VREF threshold, the comparator’s output changes state. It is important to use a

stable reference voltage to ensure a consistent switching point.

Figure 36. Threshold Detector