EP 0764895 B1 19990421 - Sound generator, in particular for time piece
Title (en)
Sound generator, in particular for time piece
Title (de)
Schallgenerator, insbesondere für Uhrwerk
Title (fr)
Générateur sonore, notamment pour pièce d'horlogerie
Publication
Application
Priority
CH 266995 A 19950921
Abstract (en)
[origin: EP0764895A1] A mirror current circuit (11) drives an electrode (9) driving the base of a transistor (5). The transistor drives a capacitor (7). The transistor emitter is connected to an acoustic output (A). The capacitor determines the frequency of the note produced. Thus by varying the mirror current, a tune can be played.
IPC 1-7
IPC 8 full level
G04C 21/02 (2006.01); G04G 13/02 (2006.01); G10H 1/057 (2006.01); G10K 9/12 (2006.01); G10K 9/122 (2006.01)
CPC (source: EP US)
G04G 13/021 (2013.01 - EP US); G10H 1/057 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0764895 A1 19970326; EP 0764895 B1 19990421; CA 2186069 A1 19970322; CH 689243 B5 19990715; CH 689243G A3 19990115; DE 69602146 D1 19990527; DE 69602146 T2 19991118; HK 1013691 A1 19990903; JP 4037930 B2 20080123; JP H09127269 A 19970516; SG 63663 A1 19990330; TW 317630 B 19971011; US 5668783 A 19970916
DOCDB simple family (application)
EP 96114707 A 19960913; CA 2186069 A 19960920; CH 266995 A 19950921; DE 69602146 T 19960913; HK 98115069 A 19981223; JP 27129096 A 19960924; SG 1996010579 A 19960910; TW 85110960 A 19960907; US 71025096 A 19960913