The invention concerns a modulator (M) for
data transmission between a
transponder and a
base station, which amplitude modulates and / or phase modulates a received electromagnetic
carrier signal as a function of data to be transmitted, having a control input at which a modulation
control signal is present, having a
rectifier (GL) circuit for rectifying the received electromagnetic
carrier signal which has at least one
rectifier stage (S1-S3), having at least one switching device (SE) which is controllable through the modulation
control signal and whose output side intervenes in at least one
rectifier stage of the rectifier circuit, and by means of which a reference
voltage can be applied to at least one node (H1-H3) of said rectifier stage. The invention further concerns a
transponder with such a modulator and a modulation method for operating such [a modulator]. The invention concerns a modulator for data communication between a
transponder and a
base station, which amplitude modulates and / or phase modulates a received electromagnetic
carrier signal as a function of data to be transmitted, having a control input at which a modulation
control signal is present, having a rectifier circuit for rectifying the received electromagnetic carrier
signal which has at least one rectifier stage, having at least one switching device which is controllable through the modulation control
signal and whose output side intervenes in at least one rectifier stage of the rectifier circuit, and by means of which a reference
voltage can be applied to at least one node of said rectifier stage. The invention further concerns a transponder with such a modulator and a modulation method for operating such a modulator.