WIRELESS TEMPERATURE SENSOR
First Claim
1. Integrated temperature sensor comprising:
- means for generating a pulse train, DATA_IN, at a certain oscillation frequency;
means for counting the number of pulses of the pulse train, DATA_IN, during a fixed time independent of a temperature to be measured, T, and for generating a plurality of bits, b11, b10, . . . , b0, indicating the number of pulses comprised in the pulse train, DATA_IN;
means for generating a serial digital signal, DATA_OUT, DATA_OUT@T, from the plurality of bits, b11, b10, . . . , b0;
wherein the means for generating a pulse train, DATA_IN, comprise a plurality of logic gates which are capable of introducing a delay dependent on the temperature to be measured, T, the means generating a pulse train, DATA_IN, the oscillation frequency of which is dependent on the temperature to be measured, T.
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Abstract
The invention relates to an integrated temperature sensor (1) comprising: means (2000) for generating a pulse train (DATA_IN) at an oscillation frequency, means (3000) for counting the number of pulses during a fixed period of time independent of a temperature to be measured (T) and for generating a plurality of bits (b11, b10, . . . , b0) indicating the number of pulses in the pulse train (DATA_IN), and means (4000) for generating a serial digital signal (DATA_OUT) from said bits (b11, b10, . . . , b0), in which the means (2000) for generating a pulse train (DATA_IN) include a plurality of logic gates (2410, 2420, 2430, 2440, 2450) which can introduce a delay dependent on the temperature to be measured (T), said means (2000) generating a pulse train (DATA_IN) the oscillation frequency of which is dependent on said temperature to be measured (T). The invention also relates to a temperature measurement method and to a transponder for a wireless system.
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Citations
27 Claims
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1. Integrated temperature sensor comprising:
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means for generating a pulse train, DATA_IN, at a certain oscillation frequency; means for counting the number of pulses of the pulse train, DATA_IN, during a fixed time independent of a temperature to be measured, T, and for generating a plurality of bits, b11, b10, . . . , b0, indicating the number of pulses comprised in the pulse train, DATA_IN; means for generating a serial digital signal, DATA_OUT, DATA_OUT@T, from the plurality of bits, b11, b10, . . . , b0; wherein the means for generating a pulse train, DATA_IN, comprise a plurality of logic gates which are capable of introducing a delay dependent on the temperature to be measured, T, the means generating a pulse train, DATA_IN, the oscillation frequency of which is dependent on the temperature to be measured, T. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. Temperature measurement method comprising the following steps:
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generating a pulse train, DATA_IN, at a certain oscillation frequency; counting the number of pulses of the pulse train, DATA_IN, during a fixed time independent of the temperature to be measured, T, and generating a plurality of bits, b11, b10, . . . , b0, indicating the number of pulses comprised in the pulse train, DATA_IN; generating a serial digital signal, DATA_OUT, DATA_OUT@T, from the plurality of bits, b11, b10, . . . , b0; wherein the pulse train, DATA_IN, is generated by means of an oscillator comprising a plurality of logic gates which are capable of introducing a delay dependent on the temperature to be measured, T, the oscillation frequency of the pulse train, DATA_IN, being dependent on the temperature to be measured, T. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification