System clock jitter correction
US8957796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2014 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Oct 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1245
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method are provided for frequency multiplication jitter correction. The method accepts an analog reference signal having a first frequency, and using the analog reference signal, derives a system clock signal having a second frequency, greater than the first frequency. A PLL using a voltage controlled oscillator (VCO) is one example of a frequency multiplier. The method samples the amplitude of the analog reference signal using the system clock signal and converts the sampled analog reference signal into a digitized reference signal. In response to comparing the digitized reference signal to an ideal digitized reference signal, the phase error correction for the system clock signal is derived. The phase error correction at a first instance of time can be applied to the digitized data signal, previously converted from an analog data signal sampled at a first instance of time with the system clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.