Receiver for CVSD modulation with integral filtering
US4406010A · kind A · utility
0Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1980 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Dec 30, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/024
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
CVSD modulation is detected by applying a digital signal containing CVSD information to a digital filter that is in the CVSD loop that includes a syllabic filter and a rule circuit. The digital filter includes voltage-operated switches that switch one of two voltages to a resistor network and thereby combine multiplication and digital filtering. The output of the digital filter is the output of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.