Undesired signal canceller
US4081837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1976 |
| Grant date | Mar 28, 1978 |
| Priority date | — |
| Expiry date | Jun 22, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/211
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An undesired signal canceller for a composite amplitude modulated signal including an undesired signal delayed by a time .tau..sub.o from a desired signal. The composite signal is supplied to a detector circuit. A carrier signal of the same frequency as that of the amplitude modulated carrier and delayed in phase by the time .tau..sub.o is produced. This carrier signal is amplitude modulated with a signal formed by delaying the output signal from the detector circuit by the time .tau..sub.o, and the amplitude modulated carrier signal is combined with the composite amplitude modulated signal to cancel the undesired signal therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.