Abstract: A transmitter (1; 21) to transmit an amplitude modulated data signal (2) in an RF-Field (3) over the air to a receiver (4) of an RFID communication system (5; 22) which transmitter (1; 21) comprises: a wave generator (6) to generate a carrier signal (7) with a particular frequency and waveform; a modulation stage (15) to modulate the carrier signal (7) in relation to a data signal to be transmitted; an antenna (11) connected to the modulation stage (15) or wave generator (6) via an amplifier (9) and a matching circuit (10) to transmit the amplitude modulated data signal (2) in the RF-Field (3) over the air, characterized in that the transmitter (1; 21) furthermore comprises: a shape stage (16) connected to the wave generator (6) to select the waveform of the carrier signal (7) depending directly or indirectly on the data signal.

Abstract: A digital power amplifier comprises: an integrated circuit (IC2); an adaption circuit of discrete components connected to first and second transmission output pins of an integrated circuit to adapt the output signal and feed a substantial sinusoidal output current with a transmission resonance frequency to an RFID antenna. IC2 comprises a digital control section with N wave-forming contacts to output a digital wave-forming bit combination of N bits with a clock frequency M-times the transmission resonance frequency; N driver blocks each connected with a first contact to one of the wave-forming contacts and N/2 of them connected with a second contact to the first transmission output pin and the other N/2 of them connected with their second contact to the second transmission output pin. The driver blocks provide increments of the substantial sinusoidal output current to the first and second transmission output pins.

Abstract: A device (5; 16; 26) that processes a Near Field Communication type application which device (5; 16; 26) comprises: a host controller circuit (3; 27) that processes device applications, that use the Near Field Communication type application, and that processes a host driver (7; 28) that communicates based on a first interface protocol (NCI; EMV); a NFC controller circuit (4; 33) that processes a Near Field Communication type contactless interface (6; 35) and a controller driver (11; 32) that interfaces with the host controller circuit (3; 27), wherein the host controller circuit (3; 27) processes a first transmission module (9; 30) that interfaces with the host driver (7; 28) based on the first interface protocol (NCI; EMV) and with the controller driver (11; 32) based on a second interface protocol, which first transmission module (9; 30) furthermore processes substantially all none-time critical and/or memory consuming tasks of the Near Field Communication type application and wherein the NFC controller cir

Abstract: A reader (5) with an antenna (6) that transmits a HF field (10) with a carrier frequency and receives an analog input signal (11) with the antenna (6), which analog input signal (11) may be load modulated with a modulation frequency, and outputs digital data detected in the input signal (11), which reader (5) comprises: a mixer (13, 15) that mixes the input signal (11) with a carrier frequency signal (9, 16) and provides a mixed output signal (14); target detection means (22) to detect the presence of a target in the HF field (10) and to activate processing of the input signal (11) to communicate with the target, wherein target detection means (22) comprise: low-pass filter means (23, 25) to eliminate signal components of the mixed output signal (14) at the modulation frequency and above and to provide a filtered output signal (24); quantification means (32) that quantify the filtered output signal (24) and provide quantified detection data (33); decision means (36) that compare the quantified detection data

Abstract: A receiver receives a load modulated analog input signal and outputs digital data detected in the input signal. An in-phase correlator and a quadrature-phase correlator for each of an in-phase component and an quadrature-phase component correlate the in-phase component and the quadrature-component with an in-phase component and a quadrature-phase component of a subcarrier or code clock frequency of the input signal. A combiner combines four output signals of the two in-phase correlators and the two quadrature-phase correlators. A slicer samples an output signal of the combiner at maximum energy levels to output the digital data detected in the input signal.

Abstract: A Receiver (17) that receives a load modulated analog input signal (19) and outputs digital data (20) detected in the input signal (19), which receiver (17) comprises: an in-phase mixer (21) that mixes the input signal (19) with an in-phase carrier frequency (22) and provides an in-phase component (23) of the down-converted input signal and a quadrature-phase mixer (24) that mixes the input signal (19) with a quadrature-phase carrier frequency (25) and provides a quadrature-phase component (26) of the down-converted input signal; an amplifier (29, 30) to amplify the in-phase component (23) and the quadrature-phase component (26) of the down-converted input signal; a DC block filter (31) to remove the DC component of the in-phase component (23) and the quadrature-phase component (26), wherein the receiver furthermore comprises: an in-phase correlator (33, 34) and a quadrature-phase correlator (35, 36) for each of the in-phase component (23) and the quadrature-phase component (26) to correlate the in-phase comp

Abstract: A device (5; 16; 26) that processes a Near Field Communication type application which device (5; 16; 26) comprises: a host controller circuit (3; 27) that processes device applications, that use the Near Field Communication type application, and that processes a host driver (7; 28) that communicates based on a first interface protocol (NCI; EMV); a NFC controller circuit (4; 33) that processes a Near Field Communication type contactless interface (6; 35) and a controller driver (11; 32) that interfaces with the host controller circuit (3; 27), wherein the host controller circuit (3; 27) processes a first transmission module (9; 30) that interfaces with the host driver (7; 28) based on the first interface protocol (NCI; EMV) and with the controller driver (11; 32) based on a second interface protocol, which first transmission module (9; 30) furthermore processes substantially all none-time critical and/or memory consuming tasks of the Near Field Communication type application and wherein the NFC controller cir