Method and apparatus for clock recovery
US5237290A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0276
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for recovering the phase of a signal which may change at periodic intervals is disclosed which comprises gated variable frequency oscillators. These results are obtained in an illustrative embodiment of the present invention in which an incoming signal is fed into a gated oscillator and the complement of the incoming signal is fed into a matching gated oscillator. Advantageously, the respective outputs of the two oscillators are fed into a Boolean NOR gate. When the gated oscillators are designed to oscillate at the frequency of the incoming signal, the output waveform will have a bounded phase relationship with respect to the incoming signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.