If filter arrangement for FM reception signals
US5584063A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1995 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Aug 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention concerns an I.F. filter arrangement in a receiver for receiving FM signals. An I.F. filter arrangement is to be provided which no longer contains the disadvantageous effects of a control loop from which a control value is extracted from the MPX signal to be used for tracking the I.F. filter. The solution according to the invention is an I.F. filter arrangement having a filter device which comprises a defined, in particular, a fixed adjusted bandpass region and at least two outputs having center frequencies staggered with respect to one another or I.F. frequencies staggered with respect to one another at the same center frequency. The signals from the outputs are fed to a weighting device which is regulated by a control value extracted from the demodulated FM signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.