Spread spectrum clock generator
US9923566B1 · kind B1 · utility
2Cited by
2References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2016 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Aug 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B15/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase or frequency locked-loop circuit includes an oscillator configured to generate an output clock signal having a frequency set by an oscillator control signal. A modulator circuit receives a first signal and a second signal and is configured to generate a control signal having a value modulated in response to the first and second signals. A filter circuit generates the oscillator control signal by filtering the control signal. A delta-sigma modulator circuit operates to modulate the second signal in response to a modulation profile. As a result, the output clock signal is a spread spectrum clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.