Reference frequency calibration module and apparatus using the same
US9762253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2015 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Jan 13, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/235
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reference frequency calibration module is provided. The reference frequency calibration module includes an oscillator, a frequency divider, a phase-locked loop (PLL) and a frequency-offset calibration unit. The frequency divider couples to the oscillator. The phase-locked loop couples to the frequency divider. The frequency-offset calibration unit couples to the frequency divider and the phase-locked loop. The oscillator is configured for operatively generating an oscillating signal having an oscillating frequency. The frequency divider divides the oscillating signal having the oscillating frequency by a first division parameter to generate a first clock signal having a first reference frequency. The phase-locked loop generates a second clock signal having a second reference frequency according to the first clock signal. The frequency-offset calibration unit is configured for operatively generating the first division parameter according to the second clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.