Patent application number | Description | Published |
20080205105 | VOLTAGE CONVERTER - A voltage converter having an input unit, a transitional unit configured to convert an AC voltage provided by the input unit into a transitional voltage and at least one auxiliary transitional voltage, and an output unit configured to convert the transitional voltage to a DC voltage using a charge pump unit, the charge pump unit being supplied with the at least one auxiliary transitional voltage as a control signal. | 08-28-2008 |
20080252418 | TRANSPONDER DEVICE AND METHOD FOR PROVIDING A SUPPLY VOLTAGE - Transponder circuit arrangement having antenna connections for application of a voltage signal, a load-reduction modulation device, which is coupled to the antenna connections and is designed to modulate the applied, unmodulated voltage signal, which is at a first level, and a voltage conversion device, which is coupled to the load-reduction modulation device and is designed to provide a supply voltage, the magnitude of whose level is greater than the first level. | 10-16-2008 |
20080258874 | TRANSPONDER CIRCUIT ARRANGEMENT AND METHOD FOR OPERATING A DEMODULATOR - A transponder circuit arrangement including antenna contacts to which an antenna signal can be applied. The antenna signal includes at least one signal in one transmission band of a plurality of transmission bands. The transponder circuit arrangement also includes a detector adapted to detect whether the antenna signal includes a signal in a predetermined transmission band, and a demodulator adapted to demodulate the signal in the predetermined transmission band when the signal has been detected therein, and otherwise to demodulate a signal in another transmission band. | 10-23-2008 |
20090085641 | CIRCUIT AND METHOD FOR INTEGRATING A VOLTAGE SIGNAL - A circuit arrangement having a signal input configured to be supplied with a voltage signal; a first operational transconductance amplifier (OTA) having a voltage input that may be coupled to the signal input; at least one second OTA having a voltage input that may be coupled to the signal input; and at least one output capacitor which may be coupled to an output of the first OTA and to an output of the at least one second OTA, wherein an identical potential is set at the outputs of the first OTA and of the at least one second OTA. | 04-02-2009 |
20090127934 | EMERGENCY CAPACITOR FOR A CONTACTLESS DEVICE - A power supply for a contactless device having a power supply circuit configured to provide an internal power supply voltage, an emergency capacitor circuit having an emergency capacitor, configured to provide a source current during an external field pause, and a power supply regulator configured to regulate the internal power supply voltage and the source current, wherein the emergency capacitor circuit is electrically coupled in parallel with the power supply circuit. | 05-21-2009 |
20090128354 | POWER SUPPLY FOR PROVIDING AN INTERNAL POWER SUPPLY VOLTAGE - A power supply for providing an internal supply voltage, the power supply including a current source configured to provide an internal supply voltage directly from its output, and a high speed internal supply voltage shunt, which is coupled to the current source output. | 05-21-2009 |
20090135635 | VOLTAGE CONVERTER, USAGE OF A VOLTAGE CONVERTER, METHOD FOR CONVERTING AN AC VOLTAGE INTO A DC VOLTAGE, AND CONTACTLESS CHIP CARD - The invention relates to a voltage converter comprising a rectification unit and a voltage regulation unit, wherein the input side of the voltage converter can have an AC voltage applied to it, the output side of the voltage converter can have a rectified voltage taken from it, and the voltage regulation unit regulates the power in the voltage converter. | 05-28-2009 |
20090200383 | ACTIVELY REGULATED MODULATION INDEX FOR CONTACTLESS IC DEVICES - A contactless IC device including a detection circuit configured to detect a carrier wave that has been amplitude shift-keying (ASK) modulated with digital data and a shunt circuit configured to regulate the carrier wave to a predetermined voltage level. | 08-13-2009 |
20100060351 | Chip Card Having an Adjustable Demodulation Unit - The present invention shows a contactless chip card comprising a controllable demodulation unit for demodulating an amplitude-modulated carrier signal, a measuring unit for determining a degree of modulation of the modulated carrier signal, and a control unit for controlling the demodulation unit on the basis of the determined degree of modulation of the carrier signal. | 03-11-2010 |
20100303173 | CIRCUIT FOR DEMODULATING A PHASE MODULATED SIGNAL - A demodulator is provided for demodulating a phase-modulated data signal. The demodulator includes a phase frequency detector to output a voltage representing a phase difference between a received phase-modulated data signal and a reference clock signal. The voltage is input to first and second phase change detectors, which are provided to measure the phase difference of the phase-modulated data signal during first and second time periods, respectively. | 12-02-2010 |
20100314444 | ANTENNA INTERFACE HAVING A PAUSE DETECTOR - An antenna interface of a contactless device including a current source configured to provide a current signal which is dependent on a radio frequency field; and a pause detector coupled to the current source and configured to detect a field pause from the current signal and output a field pause signal. | 12-16-2010 |
20100314445 | CONTACTLESS COMMUNICATION VIA A PLURALITY OF INTERFACES - A contactless communication device including an energy interface configured to activate the contactless communication device or a contactless communication partner based on a first carrier signal; and a contactless high speed data interface configured to enable data communication between the contactless communication device and the contactless communication partner based on a second carrier signal having a frequency greater than a high frequency (HF). | 12-16-2010 |
20120056718 | TRANSPONDER AND METHOD FOR OPERATING A TRANSPONDER - An RFID transponder having an adjustable response field strength including a determination circuit formed to determine a quantity which is derivable from a field strength of an electromagnetic field prevailing at the location of the RFID transponder, a comparator formed to compare the determined quantity derived from the field strength with a threshold value, wherein the threshold value is based on the adjustable response field strength, which is higher than the minimum field strength required for the operation of the RFID transponder, and a deactivator formed to deactivate a functionality of the RFID transponder if the derived quantity falls below the threshold value. | 03-08-2012 |
20130234528 | Power supply apparatus for providing a voltage from an electromagnetic field - Different exemplary embodiments provide a power supply apparatus for providing a voltage from an electromagnetic field, which apparatus has a conversion device which is set up to derive a voltage from a wirelessly received electromagnetic field, and a decoupling device which is coupled to the conversion device and has a first connection and a second connection, at each of which a supply voltage is provided, the decoupling device suppressing an effect of the circuits coupled to the first and second connections on the power supply apparatus. | 09-12-2013 |
20130271095 | Linear Voltage Regulator - A voltage regulator includes an output stage including a control terminal and a load path, with the load path coupled between the input terminal and the output terminal. The voltage regulator also includes a control circuit with an input stage, a first current mirror, and a second current mirror. The input stage includes a first control input configured to receive a first reference voltage, a second control input configured to receive a second reference voltage, a feedback input coupled to the output terminal, a first output terminal, and a second output terminal. The first current mirror includes a reference current path coupled between a first supply terminal and the first output terminal of the input stage, and an output current path coupled between the first supply terminal and the control terminal of the pass device. | 10-17-2013 |
20140319228 | SMART CARD - In accordance with various embodiments, a smart card including one or more components to be supplied and a current source, which is configured to provide a supply current with a predefined current intensity to the one or more components to be supplied, is described. | 10-30-2014 |