Wireless data communication device and communication system including such a device
First Claim
1. A wireless data communication device particularly for a portable object, the device including an oscillator circuit, which produces high frequency signals, and a signal processing unit connected to the oscillator circuit, wherein a connection structure of one part of the oscillator circuit, which produces the high frequency signals, is arranged to act as antenna for the transmission of data by means of stray signals transmitted by the connection structure, wherein the processing unit provides at least one control signal to the oscillator circuit, said control signal depending upon the data to be transmitted by means of the stray signals, and wherein the oscillator circuit includes a frequency synthesiser connected to a reference oscillator unit, the synthesiser including, in a phase lock loop, a voltage controlled oscillator, followed by an amplifier, which provides high frequency signals, a frequency divider for signals provided by the voltage controlled oscillator, and a phase detector comparing the frequency of the signals provided by the frequency divider and the frequency of the reference signals provided by the reference oscillator unit, the output of the phase detector being connected to the voltage controlled oscillator, and wherein the control signal, provided by the processing unit, controls the switching on or off of the amplifier for the transmission of data by amplitude modulation of the stray signals.
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Accused Products
Abstract
The wireless data communication device (1) is mounted in a portable object, such as a wristwatch. The device includes an oscillator circuit (6), which produces high frequency signals (SH), and a signal processing unit (7), connected to the oscillator circuit. The connection structure of one part of the oscillator circuit (14, 15), which produces the high frequency signals, is arranged to act as antenna for the transmission of data by means of stray signals (SP) transmitted by the connection structure. The processing unit provides a control signal (CC) to the oscillator circuit depending upon the data to be transmitted by means of the stray signals by the connection structure. An amplitude modulation or a frequency modulation can be used for the transmission of data by means of the stray signals.
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Citations
14 Claims
- 1. A wireless data communication device particularly for a portable object, the device including an oscillator circuit, which produces high frequency signals, and a signal processing unit connected to the oscillator circuit, wherein a connection structure of one part of the oscillator circuit, which produces the high frequency signals, is arranged to act as antenna for the transmission of data by means of stray signals transmitted by the connection structure, wherein the processing unit provides at least one control signal to the oscillator circuit, said control signal depending upon the data to be transmitted by means of the stray signals, and wherein the oscillator circuit includes a frequency synthesiser connected to a reference oscillator unit, the synthesiser including, in a phase lock loop, a voltage controlled oscillator, followed by an amplifier, which provides high frequency signals, a frequency divider for signals provided by the voltage controlled oscillator, and a phase detector comparing the frequency of the signals provided by the frequency divider and the frequency of the reference signals provided by the reference oscillator unit, the output of the phase detector being connected to the voltage controlled oscillator, and wherein the control signal, provided by the processing unit, controls the switching on or off of the amplifier for the transmission of data by amplitude modulation of the stray signals.
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11. A wireless data communication device particularly for a portable object, the device including an oscillator circuit, which produces high frequency signals, and a signal processing unit connected to the oscillator circuit, wherein a connection structure of one part of the oscillator circuit, which produces the high frequency signals, is arranged to act as antenna for the transmission of data by means of stray signals transmitted by the connection structure, wherein the processing unit provides at least one control signal to the oscillator circuit, the control signal depending upon the data to be transmitted by means of the stray signals, and wherein the oscillator circuit includes a frequency synthesiser connected to a reference oscillator unit, said synthesiser including, in a phase lock loop, a voltage controlled oscillator, followed by an amplifier, which provides high frequency signals, a frequency divider for the signals provided by the voltage controlled oscillator, and a phase detector comparing the frequency of the signals provided by the frequency divider and the frequency of the reference signals provided by the reference oscillator unit, the output of the phase detector being connected to the voltage controlled oscillator, and wherein the processing unit provides the control signal to the frequency divider so as to modify the division factor of the divider for the transmission of data by frequency modulation of the stray signals.
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12. A short distance wireless data communication system between a communication device and an electronic apparatus;
- wherein
the communication device is a wireless data communication device for a portable object, the device includes an oscillator circuit, which produces high frequency signals, and a signal processing unit connected to the oscillator circuit, wherein a connection structure of one part of the oscillator circuit, which produces the high frequency signals, is arranged to act as antenna for the transmission of data by means of stray signals transmitted by the connection structure, and wherein the processing unit provides at least one control signal to the oscillator circuit, the control signal depending upon the data to be transmitted by means of the stray signals;
whereinthe apparatus includes stray signal receiving means and signal processing means connected to the receiving means in order to extract the data from the stray signals transmitted by the device when the device is placed in proximity to the apparatus; and wherein the communication device forms part of a portable object, wherein the portable object is a watch, and wherein the electronic apparatus includes a housing for receiving the watch so that the apparatus constitutes a support for the watch. - View Dependent Claims (13, 14)
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Specification