Method and apparatus for phase rotation in a phase locked loop
US6014047A · kind A · utility
20Cited by
16References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Jan 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0991
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Among a plurality of signals, each phase-shifted with respect to the others, one signal is repeatedly substituted for another as a clock signal, to reduce a phase error of the clock signal with respect to a reference clock. The substitutions are timed to occur during intervals tending to reduce disturbances to the clock signal. Also, such substitution of a signal is responsive to occurrence of at least one cycle of the signal subsequent to the clock being supplied by an immediate predecessor of the signal, which tends to prevent erroneous substitutions of one signal for another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.