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Machine translation
1. (WO2002009028) LOW-POWER PASSIVE TRANSPONDER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/009028    International Application No.:    PCT/CH2001/000446
Publication Date: 31.01.2002 International Filing Date: 17.07.2001
Chapter 2 Demand Filed:    01.02.2002    
IPC:
G06K 7/00 (2006.01), G06K 19/07 (2006.01)
Applicants: MICROCID SA [CH/CH]; Y-Park, Rue de Galil{e 15, CH-1400 Yverdon-les-Bains (CH) (For All Designated States Except US).
MBBS HOLDING SA [CH/CH]; Les Moteresses 22, Ch-2075 Thielle-Wavre (CH) (For All Designated States Except US).
BUI, Ngoc-Chau [CH/CH]; (CH) (For US Only).
WERNER, Christian [CH/CH]; (CH) (For US Only).
GAUDENZI, Yves [CH/CH]; (CH) (For US Only).
BENOIT, Martial [CH/CH]; (CH) (For US Only).
CASSI, Vincent [CH/CH]; (CH) (For US Only).
MIRUS, Christian [AT/CH]; (CH) (For US Only).
CHATELAIN, Jean-Daniel [CH/CH]; (CH) (For US Only).
KOWALCZUK, Jacques [FR/FR]; (FR) (For US Only)
Inventors: BUI, Ngoc-Chau; (CH).
WERNER, Christian; (CH).
GAUDENZI, Yves; (CH).
BENOIT, Martial; (CH).
CASSI, Vincent; (CH).
MIRUS, Christian; (CH).
CHATELAIN, Jean-Daniel; (CH).
KOWALCZUK, Jacques; (FR)
Agent: GRESSET - LAESSER - NITHARDT; Puits-Godet 8a, CH-2000 Neuchâtel (CH)
Priority Data:
00/09625 21.07.2000 FR
Title (EN) LOW-POWER PASSIVE TRANSPONDER
(FR) TRANSPONDEUR PASSIF A FAIBLE CONSOMMATION
Abstract: front page image
(EN)The invention concerns a radio-frequency transponder (12) for contact-free identification with a reader (10), comprising: an antenna (24), an analog circuit (25) including a capacitor (32) an AC-DC converter (34), a modulator (40) and a demodulator (38), a logic control circuit (26), a storage unit (27). Said transponder (12) is designed such that: the antenna (24) and the capacitor (32) form together a resonant circuit, the clock extractor (36) processes the first signal (Tx) to extract therefrom a clock signal addressed to said modulator (38) as long as the voltage of said signal (Tx) exceeds a first threshold value, the converter (34) transforms the first signal (Tx) into a rectified signal, to power the transponder (12). The performances of the transponder, and more particularly energy recuperation and data transmission rate, are improved by the fact that the analog circuit comprises two clock extractors, one of low level type (35), the other of the high level type (36).
(FR)Transpondeur (12) radio-fréquence, pour une identification sans contact au moyen d"un lecteur (10), comprenant: une antenne (24), un circuit analogique (25) qui comporte un condensateur (32), un convertisseur de courant alternatif en courant continu (34), un modulateur (40) et un démodulateur (38), un circuit logique de commande (26), et une mémoire (27). Ce transpondeur (12) est agencé de maniére à ce que: l"antenne (24) et le condensateur (32) forment, ensemble, un circuit résonnant, l"extracteur d"horloge (36) traite le premier signal (Tx) pour en extraire un signal d"horloge adressé audit démodulateur (38) tant que la tension de ce signal (Tx) dépasse une première valeur de seuil, le convertisseur (34) transforme le premier signal (Tx) en un signal redressé, pour assurer l"alimentation du transpondeur (12). Les performances du transpondeur, et plus particulièrement la récupération de l"énergie et la vitesse de transmission d"informations, sont améliorées grâce au fait que le circuit analogique comporte deux extracteurs d"horloge, l"un de type bas (35), l"autre de type haut (36).
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: French (FR)
Filing Language: French (FR)