Demodulating circuit for controlling stereo separation
US4399325A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 2, 1980 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Dec 2, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1676
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A demodulating circuit is capable of controlling stereo separation as a function of an electric field strength. An intermediate frequency signal not limited obtained from an intermediate frequency circuit is utilized as a signal representative of the level associated with the electric field strength. Stereo separation is discontinuously controlled as a function of the signal representative of the electric field strength. The separation is maintained in the possible maximum value in the region exceeding a predetermined value of the electric field strength but is abruptly decreased to a given value between a stereo state and a monaural state from the above described maximum value (stereo state) when the electric field strength becomes smaller than the above described predetermined value and the separation is changed as a function of the electric field strength in the region smaller than the above described value of the electric field strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.