EP 0767553 B1 20030723 - Circuit for generating short muting impulses in a car radio receiver
Title (en)
Circuit for generating short muting impulses in a car radio receiver
Title (de)
Schaltungsanordnung für ein Autoradio zur Erzeugung kurzzeitiger Stummschaltimpulse
Title (fr)
Circuit pour produire des impulsions d'interruption du son de courte durée pour un récepteur d'automobile
Publication
Application
Priority
EP 95115583 A 19951002
Abstract (en)
[origin: EP0767553A1] The arrangement includes a bandpass filter (1), logarithmic operator (2), diode (3), and low pass filter (4). The input signal (MPX) is passed through these to produce a signal (S2). This signal is then operated on separately by an adder (5), which increases the signal level (pref. by 0.6V), and by two independent time-constant delay circuits (6,7). The outputs of each of these circuits are fed to respective inputs of a level comparator (8) with the adder output being fed to the reference input (A). The comparator output (S6), which is essentially a negative pulse of short time span (pref. about 8 ms), is then fed to a radio muting circuit.
IPC 1-7
IPC 8 full level
H04H 20/26 (2008.01); H04H 40/45 (2008.01)
CPC (source: EP)
H04H 20/22 (2013.01); H04H 40/45 (2013.01); H04H 2201/13 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0767553 A1 19970409; EP 0767553 B1 20030723; DE 59510754 D1 20030828
DOCDB simple family (application)
EP 95115583 A 19951002; DE 59510754 T 19951002