EP 2461604 A1 20120606 - Differential microphone circuit
Title (en)
Differential microphone circuit
Title (de)
Differentialmikrofonschaltung
Title (fr)
Circuit de microphone différentiel
Publication
Application
Priority
EP 10193885 A 20101206
Abstract (en)
An apparatus for a portable electronic device for receiving a jack of a headset, the jack including a set of lines, the set of lines including at least one audio line, a ground signal and a microphone signal line, the apparatus comprising a set of switches for receiving the ground signal line and the microphone signal line and a sensing circuit for reducing induced noise from the headset, wherein the sensing circuit is located between the set of switches and the microphone signal line and ground signal line.
IPC 8 full level
H04R 3/00 (2006.01)
CPC (source: EP)
H04R 3/00 (2013.01)
Citation (search report)
- [XY] WO 9957937 A1 19991111 - TUORINIEMI VEIJO MATIAS [US]
- [Y] US 2005147229 A1 20050707 - KING JAY S [US]
- [Y] MAXIM: "Feature-Rich, Complete Audio Record/Playback for GSM/GPRS Cell Phones", APPLICATION NOTE, 12 September 2005 (2005-09-12), XP002639104, Retrieved from the Internet <URL:http://www.maxim-ic.com/app-notes/index.mvp/id/3573> [retrieved on 20110526]
- [Y] JEROME JOHNSTON: "A collection of bridge transducer digitizer circuits", APPLICATION NOTE, 31 January 1995 (1995-01-31), Austin, Tx, USA, XP002639105, Retrieved from the Internet <URL:http://www.cirrus.com/cn/pubs/appNote/an31.pdf> [retrieved on 20110526]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2461604 A1 20120606; EP 2461604 B1 20170419; CA 2759921 A1 20120606; CA 2759921 C 20151103
DOCDB simple family (application)
EP 10193885 A 20101206; CA 2759921 A 20111130