EP 0662267 A1 19950712 - IF FILTER ARRANGEMENT FOR FM RECEPTION SIGNALS.
Title (en)
IF FILTER ARRANGEMENT FOR FM RECEPTION SIGNALS.
Title (de)
ZF-FILTERANORDNUNG FÜR FM-EMPFANGSSIGNALE.
Title (fr)
SYSTEME DE FILTRAGE FI POUR SIGNAUX DE RECEPTION FM.
Publication
Application
Priority
- DE 9400842 W 19940721
- DE 4324603 A 19930722
Abstract (en)
[origin: WO9503650A1] The invention relates to an IF filter arrangement in an FM signal receiver. An IF filter arrangement is to be provided in which the adverse effects of a control loop in which controlled variables obtained from the MPX signal for tracking the IF filter do not arise. The solution of the invention is an IF filter arrangement with a filter unit having a defined and especially permanently set pass region and at least two outputs having opposed central frequencies or, with the same central frequency, offset IF frequencies. The signals from the outputs are taken to a weighting unit which is regulated by a controlled variable obtained from the demodulated FM signal.
IPC 1-7
IPC 8 full level
H03D 3/00 (2006.01)
CPC (source: EP US)
H03D 3/005 (2013.01 - EP US)
Citation (search report)
See references of WO 9503650A1
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
DE 4324603 A1 19950126; EP 0662267 A1 19950712; US 5584063 A 19961210; WO 9503650 A1 19950202
DOCDB simple family (application)
DE 4324603 A 19930722; DE 9400842 W 19940721; EP 94921580 A 19940721; US 40391995 A 19950817