Feedback loop frequency synthesizer device
US9509320B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2016 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jan 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/422
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This frequency synthesis device comprises a servo circuit for the control of a frequency provided as output by a reference frequency received as input, with this circuit comprising a first phase accumulator clocked at a frequency linked to the reference frequency, a first digital-to-analog converter, a phase comparator, a loop filter and a controlled frequency oscillator providing an electrical signal oscillating at the output frequency. It further comprises a feedback loop connecting the output to the phase comparator, comprising a second phase accumulator clocked at a frequency linked to the output frequency and a second digital-to-analog converter. A reduction in dynamics by quantization is provided between each phase accumulator and each respective digital-to-analog converter, with this quantization being carried out by truncation of digital values of accumulated phases at the output of each phase accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.