Frequency modulators with compensation for variations in modulation sensitivity
US4309674A · kind A · utility
12Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1979 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Aug 31, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C2200/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a frequency modulation system, the frequency modulation sensitivity of an oscillator is itself a function of the carrier frequency of the oscillator. The frequency modulation sensitivity is measured and stored for particular carrier frequencies, and subsequently used to control the amplitude of the modulation signal, so that when a frequency modulation signal is fed to the oscillator, a frequency deviation is obtained which is accurately related to the amplitude of the modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.