Device and method for detecting zero crossing and voltage amplitude from single pulse signal
US8058852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2009 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Feb 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/1536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and method for detecting a zero crossing and voltage amplitude of a commercial power source voltage inputted to an electronic device, from a single pulse signal are disclosed. The apparatus for detecting a zero crossing and a voltage amplitude from a single pulse signal includes: a first calculation unit that compares the commercial power source voltage to a first reference voltage to determine whether or not the commercial power source voltage is smaller than the first reference voltage; a second calculation unit that compares the commercial power source voltage to a second reference voltage smaller than the first reference voltage to determine whether or not the commercial power source voltage is larger than the second reference voltage; a pulse output unit that outputs a pulse if the commercial power source voltage is smaller than the first reference voltage but larger than the second reference voltage; and a detecting unit that detects a zero crossing and a voltage amplitude by analyzing the pulse which has been outputted from the pulse output unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.