Signal compressors and expanders
US3967219A · kind A · utility
14Cited by
7References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Sep 25, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/025
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A compressor or expander circuit is constructed by connecting a plurality of impedance networks in series across input terminals, at least one network being frequency selective. Output terminals are connected across one or more of the networks. The frequency selective network varies its parameters in response to the level of components within a restricted frequency band determined by this network so as to narrow the band when the level of such components increases. This includes such components from the restricted band and thereby from the compression or expansion action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.