Frequency modulator
US6345173B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1999 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | May 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2017
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency modulator (50, 150) for modulating a carrier signal according to a modulation data signal to provide a modulated output signal (RFout), comprises a reference signal generator (54, 154) coupled to receive the modulation data signal for performing a low frequency modulation process and for generating a reference signal modulated according to the modulation data signal, and a main synthesizer (52, 152) coupled to receive the modulated reference signal and the modulation data signal for performing a high frequency modulation process and for providing the modulated output signal at an output. Preferably, the modulated reference signal has a first modulation gain (Kr) and the modulated output signal has a modulation gain (KV) which is substantially proportional to the first modulation gain (Kr).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.