Multi-frequency signal receiver
US4347408A · kind A · utility
3Cited by
3References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 27, 1979 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Nov 27, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/4575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-frequency signal receiver, in which the digital input signals having the sampling frequency of 8 KHz or a multiple thereof are resampled at a sampling frequency of 4 KHz by means of a resampling circuit and in which the signals thus resampled are subjected to the band selection by means of a digital filter so that the frequency of the input signals may be identified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.