System for compensating for variations in clock signal frequency
US8643410B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Oct 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for compensating for variations in the frequency of an input clock signal having a first frequency includes a coarse counter that receives the input clock signal, counts a predetermined number of clock pulses of the input clock signal, and generates a coarse compensated clock signal having a second frequency. A first compensation module adjusts a clock pulse of the input clock signal based on a coarse compensation value. A residual period adjustment module accumulates a fine compensation value for each clock pulse of the coarse compensated clock signal. A fine counter operates at a third frequency of a fine clock signal, receives an adjusted delay value based on the accumulated fine compensation value, counts a number of fine clock pulses in each clock pulse of the coarse compensated clock signal, and generates a fine compensated clock signal having the second frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.