Frequency synthesis device with feedback loop
US11095292B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2020 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Jul 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1806
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency synthesis device includes a servo circuit for controlling an output frequency to an input reference frequency. The circuit includes a first phase accumulator clocked by the reference frequency, a phase comparison block, a loop filter and an oscillator. It further includes a feedback loop connecting the output to the comparison block, having a second phase accumulator clocked by the output frequency. The comparison block includes T phase comparators with logic gates receiving respectively T first logic signals from the servo circuit on T first inputs and T second logic signals from the feedback loop on T second inputs, the T first and second signals having logic levels that continuously depend on values provided by the first and second accumulators according to at least one multi-phase correspondence matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.