EP 0692921 B1 20011004 - Sound pick-up device by an electret microphone
Title (en)
Sound pick-up device by an electret microphone
Title (de)
Schallaufnahmevorrichtung durch Elektretmikrofon
Title (fr)
Dispositif de prise de son par microphone électret
Publication
Application
Priority
FR 9408807 A 19940715
Abstract (en)
[origin: EP0692921A1] The sound pick-up (1) for an electret microphone comprises a capacitive link (11,12) between each output terminal of the electret microphone (M) and an input of a differential amplifier stage (3). A biasing circuit (2) which is symmetrical w.r.t. the output terminals of the electret microphone (M) includes a first and a second voltage source (21,22), symmetrical w.r.t. a reference voltage. Each terminal is connected to an output terminal for the microphone. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/04 (2006.01); H04R 19/01 (2006.01); H04R 19/04 (2006.01)
CPC (source: EP)
H04R 1/04 (2013.01); H04R 19/016 (2013.01); H04R 19/04 (2013.01)
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
EP 0692921 A1 19960117; EP 0692921 B1 20011004; DE 69523004 D1 20011108; DE 69523004 T2 20020606; ES 2164140 T3 20020216; FR 2722636 A1 19960119; FR 2722636 B1 19960920
DOCDB simple family (application)
EP 95401674 A 19950712; DE 69523004 T 19950712; ES 95401674 T 19950712; FR 9408807 A 19940715