Circuit for automatic frequency control using a reciprocal direct digital synthesis
US6104252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1999 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Oct 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1806
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for automatic frequency control includes an oscillator and a digital synthesis device to which a first frequency of the oscillator is supplied as a clock frequency and which generates an output signal having a second frequency. A frequency comparison device determines a frequency difference between the second frequency and a reference frequency and generates a digital output signal reproducing the frequency difference. The digital output signal is then supplied as an addition value to the digital synthesis device. The circuit for automatic frequency control generates a highly accurate and temperature-compensated output signal with the second frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.