Method and apparatus adapted to transmit data
AssigneeMagellan Technology Pty Limited
InventorGraham Alexander Munro Murdoch
Life of this patent
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Abstract
The present invention relates to the field of data transmission. The invention has application to amplifiers, the transmission of data modulated signals, filters and/or matching circuits connected between an amplifier and a load, radio transmitters, the transmission of data modulated radio signals, filters and/or matching circuits used between a transmitter's power amplifier and an antenna and the field of Radio Frequency Identification (RFID), such as in the transmission of data between a tag and an interrogator. The present invention enables the transmission of phase modulated signals, by adjusting a device's tuning to substantially match the instantaneous frequency of the phase modulated signal.
Claims21
A method of configuring a transmitter in order to transmit a Phase Jitter Modulated (PJM) signal, the method comprising:
- adjusting, at a predetermined period of time corresponding to a change of phase of the PJM signal, transmitter frequency to substantially match, within predetermined limits, an instantaneous frequency of the PJM signal;
- and
- wherein said adjusting is performed by varying at least one reactance element of the transmitter.
A device adapted to transmit a Phase Jitter Modulated (PJM) signal, the device comprising:
- a variable tuning circuit adapted to adjust, at a period of time corresponding to a change of phase of the PJM signal, a transmitter frequency of a tuned circuit to substantially match, within predetermined limits, an instantaneous frequency of the PJM signal;
- and
- wherein said adjustment is performed by varying at least one reactance element of the tuning circuit.
A method of configuring a tuned circuit to enable transmission of Phase Jitter Modulated (PJM) signals, the method comprising:
- adjusting, at a period of time corresponding to a change of phase of the PJM signals, a transmitter frequency of the tuned circuit to substantially match, within predetermined limits, an instantaneous frequency of the PJM signals;
- and
- wherein said adjusting is performed by varying at least one reactance element of the tuned circuit.
A device comprising:
- a transmitter, wherein the device is adapted to configure the transmitter to transmit and receive Phase Jitter Modulation (PJM) signals;
- wherein, at a period of time corresponding to a change of phase of the PJM signals, a frequency of the transmitter is adjusted to substantially match, within predetermined limits, an instantaneous frequency of the PJM signals;
- and
- wherein said adjustment is performed by varying at least one reactance element of the transmitter.
A device adapted to transmit Phase Jitter Modulation (PJM) signals, the device comprising:
- a tuned circuit adapted to operate at a resonant frequency Fo;
- a first switch associated with a first reactance element of the tuned circuit and being adapted to enable the tuned circuit to operate at a resonant frequency Fo−ΔFo;
- a second switch associated with a second reactance element of the tuned circuit and being adapted to enable the tuned circuit to operate at a resonant frequency Fo+ΔFo;
- wherein, at a period of time corresponding to a change of phase of the PJM signals, an instantaneous transmitter frequency of the tuned circuit is adjusted to substantially match, within predetermined limits, an instantaneous frequency of the PJM signals;
- and
- wherein said adjustment is performed by varying at least one the first reactance element and the second reactance element of the tuned circuit.
Dependencies are inferred from the claim text.