Frequency modulation system and method
US6809585B2 · kind B2 · utility
2Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 2003 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | May 30, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/095
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency modulation system is disclosed which includes a voltage-controlled oscillator (VCO) 43 and a phase detector 47 configured to receive an output signal from the VCO. The phase detector is arranged to output an error signal representing the phase difference between the signal from the VCO and a reference signal. The system also includes control means 62 arranged to monitor the error signal to derive an indication of the frequency deviation of the VCO, and, in accordance with this derivation, to maintain the frequency deviation of the VCO substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.