EP 1192836 A1 20020403 - MICROPHONE WITH RANGE SWITCHING
Title (en)
MICROPHONE WITH RANGE SWITCHING
Title (de)
MIKROFON MIT BEREICHSAUSWAHL
Title (fr)
MICROPHONE AVEC SELECTION DE GAMMES
Publication
Application
Priority
- US 0109475 W 20010323
- US 54564600 A 20000407
Abstract (en)
[origin: WO0178446A1] A variable sensitivity/variable gain circuit for an electret microphone (10) having an amplifier (12) includes a sensitivity selecting circuit (32) coupled with the buffer amplifier (12) for adjusting the transduction gain of the microphone.
IPC 1-7
IPC 8 full level
H04R 1/04 (2006.01); H04R 3/00 (2006.01); H04R 3/04 (2006.01); H04R 19/01 (2006.01); H04R 21/02 (2006.01); H04R 25/00 (2006.01)
CPC (source: EP US)
H04R 1/04 (2013.01 - EP); H04R 3/04 (2013.01 - EP); H04R 19/016 (2013.01 - EP); H04R 25/00 (2013.01 - EP US); H04R 2225/61 (2013.01 - EP US); H04R 2410/01 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated extension state (EPC)
AL LT LV MK RO SI
DOCDB simple family (publication)
WO 0178446 A1 20011018; AU 5097001 A 20011023; EP 1192836 A1 20020403; EP 1192836 A4 20081008
DOCDB simple family (application)
US 0109475 W 20010323; AU 5097001 A 20010323; EP 01924304 A 20010323