Digital FM squelch detector
US4922549A · kind A · utility
10Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for determining when a frequency-modulated expected information signal resides at a predetermined channel. The method is based on determining a value based on the frequency deviation of the received signal, and then comparing the value with a threshold based on the expected information signal. The method is particularly well-suited for use as a squelch detector in digital FM radios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.