Modulation device using frequency-shift keying
US7495520B2 · kind B2 · utility
2Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2007 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Sep 21, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/0353
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A frequency-shift modulation device includes an oscillating circuit, a phase-locked loop and a digital frequency modulation circuit. The oscillating circuit is connected to the phase-locked loop in order to produce a fixed-frequency clock signal. This clock signal is used for timing the frequency modulation circuit. A standard model crystal oscillator can be used in the oscillating circuit, given that the RF frequency of a wireless transmission signal which is produced by the modulation device is determined digitally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.