Zero cross detection circuit and sensor device
US10908193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2019 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | Apr 22, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A zero cross detection circuit has a first comparator circuit receiving a first input signal and a second input signal and outputting a first comparison result, a second comparator circuit having a hysteresis function, receiving the first input signal and the second input signal, and outputting a second comparison result, a power supply voltage detection circuit outputting a detection signal when a power supply voltage to be supplied becomes equal to or larger than a predetermined voltage, and a logic circuit outputting a zero cross detection signal based on the first comparison result, the second comparison result, and the detection signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.