Method and apparatus for converting a gap-infested read-in clock into a gap-free read-out clock
US5017801A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1990 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Feb 8, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0331
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An integrated circuit wherein no disturbances due to spikes occur is provided for converting a gap-infested clock into a gap-free clock. In a phase-locked loop the frequency of a read-in clock is supplied to a phase discriminator via a frequency divider and the frequency of a read-out clock is supplied to the phase discriminator via another frequency divider. A succession of clocks shifted in phase relative to one another is provided by a generator from an auxiliary frequency of a crystal oscillator which feeds an auxiliary successor sequence clock generator which provides a plurality of successor auxiliary clocks. Which of these clocks provides the read-out clock after a division in a frequency divider is defined by a switching frequency output by a frequency divider which is controlled by the phase discriminator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.