Power mains zero-crossing detector
US7508240B1 · kind B1 · utility
4Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2007 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Jun 14, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/1536
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A zero-crossing detector includes a pair of input terminals, the terminals being adapted to receive an AC input signal; a rectifier, the rectifier rectifying the AC input signal; a current source, the current source being powered by the rectified AC input signal; and an optoelectric coupler having a coupler input and a coupler output, the coupler input being driven by the current source and the coupler output providing a zero-crossing signal. The zero-crossing signal is galvanicly isolated from the AC input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.