Modulator and modulation method for a wireless data transmission device
First Claim
1. A modulator for data transmission between a transponder and a base station, which phase modulates and/or amplitude modulates a received electromagnetic carrier signal in a transponder as a function of data to be transmitted, the modulator comprising:
- a rectifier circuit for rectifying the received electromagnetic carrier signal, the rectifier circuit having at least one rectifier stage with at least one circuit node;
at least one circuit node, which does not constitute an input of the rectifier circuit for the electromagnetic carrier signal, being operably connected by a capacitive coupling to an input of the rectifier circuit;
a switching device whose output side intervenes in at least one rectifier stage of the rectifier circuit, at least one circuit node of the rectifier stage, which does not constitute an input of the rectifier circuit for the electromagnetic carrier signal, is connected to the switching device; and
a modulation control device for providing a modulation control signal for a control input of the switching device.
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Accused Products
Abstract
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.
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Citations
22 Claims
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1. A modulator for data transmission between a transponder and a base station, which phase modulates and/or amplitude modulates a received electromagnetic carrier signal in a transponder as a function of data to be transmitted, the modulator comprising:
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a rectifier circuit for rectifying the received electromagnetic carrier signal, the rectifier circuit having at least one rectifier stage with at least one circuit node;
at least one circuit node, which does not constitute an input of the rectifier circuit for the electromagnetic carrier signal, being operably connected by a capacitive coupling to an input of the rectifier circuit;
a switching device whose output side intervenes in at least one rectifier stage of the rectifier circuit, at least one circuit node of the rectifier stage, which does not constitute an input of the rectifier circuit for the electromagnetic carrier signal, is connected to the switching device; and
a modulation control device for providing a modulation control signal for a control input of the switching device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A transponder for wireless data communication with a base station, the transponder comprising:
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a transmitting for transmitting modulated data;
a receiving device for receiving electromagnetic carrier signals; and
at least one modulator for performing, via intervention within a rectifier circuit, phase modulation and/or amplitude modulation as a function of the data that is to be transmitted, the modulator comprising;
the rectifier circuit for rectifying the received electromagnetic carrier signal, the rectifier circuit having at least one rectifier stage with at least one circuit node;
at least one circuit node, which does not constitute an input of the rectifier circuit for the electromagnetic carrier signal, being operably connected by a capacitive coupling to an input of the rectifier circuit;
a switching device whose output side intervenes in at least one rectifier stage of the rectifier circuit, at least one circuit node of the rectifier stage, which does not constitute an input of the rectifier circuit for the electromagnetic carrier signal, is connected to the switching device; and
a modulation control device for providing a modulation control signal for a control input of the switching device.
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17. A method for data transmission between a transponder and a base station, the method comprising:
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returning, in a transponder, a received electromagnetic carrier signal phase-modulated as a function of data to be transmitted;
generating a modulation control signal by a modulation control device; and
supplying the modulation control signal to a rectifier, wherein the modulation is accomplished by the rectifier. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification