Half-rate linear quardrature phase detector for clock recovery
US6970020B1 · kind B1 · utility
10Cited by
19References
8Claims
0Family size
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Key dates
| Filing date | Dec 17, 2003 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Dec 26, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D13/004
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A half-rate linear phase detector is particularly well-suited to clock data recovery in a serial data interface. The phase detector uses a quadrature clock to process different portions of the incoming data with different phases of the clock. The resulting component signals can be combined to provide the expected UP and DOWN phase detector output control signals. The phase detector output signals are balanced and of uniform width, minimizing oscillator control signal ripple in the clock data recovery circuit, while the linearity of the phase detector makes its output predictable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.