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1. (WO2007005380) IMPROVED CHARGE/DISCHARGE CONTROL CIRCUIT FOR AUDIO DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/005380 International Application No.: PCT/US2006/024841
Publication Date: 11.01.2007 International Filing Date: 27.06.2006
IPC:
H04B 15/00 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
15
Suppression or limitation of noise or interference
Applicants:
ANALOG DEVICES, INC. [US/US]; Three Technology Way Norwood, MA 02062, US (AllExceptUS)
MCHUGH, Colin, B. [US/US]; US (UsOnly)
JOSEFSSON, Olafur, Mar [US/US]; US (UsOnly)
Inventors:
MCHUGH, Colin, B.; US
JOSEFSSON, Olafur, Mar; US
Agent:
IANDIORIO, Joseph, S. ; Iandiorio & Teska 260 Bear Hill Road Waltham, MA 02451, US
Priority Data:
60/695,10129.06.2005US
Title (EN) IMPROVED CHARGE/DISCHARGE CONTROL CIRCUIT FOR AUDIO DEVICE
(FR) CIRCUIT DE COMMANDE AMELIORE DE CHARGE/DECHARGE POUR DISPOSITIF AUDIO
Abstract:
(EN) A charge/discharge control circuit (10) for controlling current through an input/output audio device includes a first voltage reference (47); a second voltage reference(16) and a waveform generation circuit(52) responsive to the first and second voltage references for generating a multi-stage waveform profile which is approximately an inaudible waveform for suppressing audible artifacts in the input/output device.
(FR) L'invention concerne un circuit de commande de charge/décharge permettant de réguler le courant dans un dispositif audio entrée/sortie, ce circuit comprenant une première référence de tension, une seconde référence de tension et un circuit générateur de signaux réagissant à la première et à la seconde tension de référence afin de générer un profil de signal à plusieurs niveaux qui est approximativement un signal inaudible pour supprimer les artefacts audibles du dispositif entrée/sortie.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP1899974CN101375534