Timing signal extracting circuit
US4658217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1984 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Sep 27, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/027
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A timing signal extraction circuit has a clock signal extractor for extracting from a transmitted data signal a clock component synchronous with the transmission rate of the transmitted signal, an oscillator having an oscillation frequency about M (M: an integer) times as high as the transmission rate of the transmitted signal, a phase-locked loop detecting the phase difference between the output signal of a frequency divider frequency-dividing the output signal of the oscillator and the output signal of the clock signal extractor thereby controlling the operating phase of the oscillator, and a logic circuit producing a plurality of pulse trains whose bit rate is equal to the transmission rate of the transmitted signal and which have respectively different phases. A pulse train having a desired phase is selected from among the plural pulse trains to provide a decision timing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.