Demodulation system with dropout correction
US3943274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1973 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Apr 2, 1993 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A demodulation system of a playback device for a carrier frequency signal containing both useful information in the zero passages of the signal and signal break-ins which occur in the playback device. The system includes a limiter for limiting in an asymmetrical manner a signal fed to it and a demodulator coupled to the output of the limiter. A highpass filter is connected between the limiter and the demodulator so as to couple the output signal from the limiter to the demodulator. The highpass filter substantially passes only the useful information portion of the carrier signal and suppresses any break-ins introduced into the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.