Techniques for generating fractional periodic signals
US8995599B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2013 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/062
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A phase-locked loop circuit includes phase detection circuitry to generate a first control signal based on a phase comparison between first and second periodic signals. An oscillator circuit causes a frequency of a third periodic signal to vary based on the first control signal. A frequency divider circuit divides the frequency of the third periodic signal by a frequency division value to generate a frequency of the second periodic signal. A delta sigma modulator circuit controls the frequency division value based on second control signals. First storage circuits store the second control signals based on third control signals in response to a fourth periodic signal. A second storage circuit stores an output signal based on a fourth control signal. The fourth periodic signal is generated based on the output signal of the second storage circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.