EP 1920389 A1 20080514 - PASSIVE CONTACTLESS INTEGRATED CIRCUIT COMPRISING AN ANTENNA IMPEDANCE MODULATION SWITCH WHICH DOES NOT INHIBIT A PRIMARY CHARGE PUMP
Title (en)
PASSIVE CONTACTLESS INTEGRATED CIRCUIT COMPRISING AN ANTENNA IMPEDANCE MODULATION SWITCH WHICH DOES NOT INHIBIT A PRIMARY CHARGE PUMP
Title (de)
PASSIVE KONTAKTLOSE INTEGRIERTE SCHALTUNG MIT EINEM ANTENNENIMPEDANZMODULATIONSSCHALTER, DER EINE PRIMÄRE LADUNGSPUMPE NICHT BEHINDERT
Title (fr)
CIRCUIT INTEGRE SANS CONTACT PASSIF COMPRENANT UN INTERRUPTEUR DE MODULATION D'IMPEDANCE D'ANTENNE N'INHIBANT PAS UNE POMPE DE CHARGE PRIMAIRE
Publication
Application
Priority
- FR 2006001766 W 20060719
- FR 0508982 A 20050902
Abstract (en)
[origin: WO2007028866A1] The invention relates to a method of modulating the impedance of an antenna circuit (ACT, W1, W2) which supplies pumping signals (S1, S2) to a charge pump (PMP) comprising at least a first pumping stage (D1, D2, C1, C2) and a last pumping stage (D5, D6, C5, C6), said last pumping stage supplying a DC voltage (Vcc). According to the invention, the output from the first pumping stage (D1, D2, C1, C2) is short-circuited by means of a switch (SW1) and the last pumping stage continues to pump the electric charges and to supply the DC voltage (Vcc). The invention is particularly suitable for RFID passive transponders.
IPC 8 full level
G06K 19/07 (2006.01)
CPC (source: EP US)
G06K 19/0713 (2013.01 - EP US); G06K 19/0723 (2013.01 - EP US)
Citation (search report)
See references of WO 2007028866A1
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
FR 2890501 A1 20070309; CN 101253518 A 20080827; CN 101253518 B 20100519; EP 1920389 A1 20080514; US 2008212346 A1 20080904; US 8022889 B2 20110920; WO 2007028866 A1 20070315
DOCDB simple family (application)
FR 0508982 A 20050902; CN 200680031656 A 20060719; EP 06778887 A 20060719; FR 2006001766 W 20060719; US 3851308 A 20080227