Novel technique for frequency detection utilizing switching filters
US3986112A · kind A · utility
2Cited by
2References
3Claims
0Family size
Inventor
Key dates
| Filing date | Feb 19, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/457
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A frequency detection device adapted to detect in which of a plurality of frequency bands an input signal occurs comprises band pass filter means for selecting from the input signal the output signals in each of the bands and detecting means responsive to said output signals to stop the scanning action of the scanning means wherein the band pass filter means comprises a band pass filter and means for scanning the filter through different bands in turn, and an indicator actuated by the stopping of the scanning action to indicate the frequency band in which the input signal has occurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.