Frequency modulator
US5075643A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Dec 24, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/0208
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved frequency modulation apparatus (100) is provided comprising a generator (102), a biasing voltage line (116), and an interface circuit (110). The generator (102) is utilized to generate a carrier signal. A control line input (104) on the generator (102) adjusts the frequency of the carrier signal. The biasing voltage line (116) provides DC power in order to DC bias the generator (102). The interface circuit (110) couples an information signal (114) to the biasing voltage line (116) for altering the biasing of the generator (102) in response to the information signal (114). The alteration of the biasing of the generator (102) results in the carrier signal being frequency modulated by the information signal (114).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.