FM radio receiver and signal processing device used therein
US5752176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/15
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An SI judging circuit in a service detecting section detects a service identification code included in a block included in received superimposed FM data. When the block represents an unnecessary service, the SI judging circuit generates a predetermined service detecting signal, which is supplied to a station selecting microcomputer. A user operates a station selecting key to request the change of the broadcasting station. When the change is requested, and also the service detecting signal indicating that the service included in the received block is not needed is supplied to the station selecting microcomputer by the SI judging circuit, a control section of the station selecting microcomputer outputs station data corresponding to the requested station to a PLL synthesizer, and then the frequency signal (tuning frequency) is changed at a front end. This enables data received during a period for receiving blocks for unnecessary services to be NG, and can prevent data of blocks including necessary services from being NG.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.