High speed phase detector and a method for detecting phase difference
US6181168A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D13/002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase detector and a method for detecting phase difference between two high frequency signals, the phase detector is adapted to receive a reference signal REF, a high frequency signal ICOS, and a signal FD synchronized to ICOS. REF, ICOS and FD have opposite edges. The phase detector comprising of: An asynchronous phase detector circuit, for providing an asynchronous control signal CTP, for representing a time interval between a time of occurrence of an edge of REF and the time of occurrence of a corresponding edge of ICOS. A synchronous phase detector circuit, for providing an synchronous control signal TC, for representing a time interval between a time of the occurrence of the corresponding edge of ICOS and the time of occurrence of a corresponding edge of FD.A combing circuit, for receiving TC and CTP and providing an error signal ERS, representing the phase difference between REF and FD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.