Abstract A transponder includes a receiving and evaluating section (22) andd a transmitting section (28). It further includes an energy storage means (18) which is chargeable by an HF interrogation pulse furnished by an interrogation device and supplies the supply voltage for the receiving and evaluating section (22) and for the transmitting section (28). An identification generator (30) in the transponder furnishes identification data fixedly associated therewith and a measurement data generator (32) receives from a sensor (34) measurement signals and converts said measurement signals to measurement data. The receiving and evaluating section (22) clears the transmitting section (28) for transmitting the identification data only when the supply voltage exceeds a first predetermined threshold value. The transmitting section is cleared for transmission of the measurement data only when the supply voltage at the energy storage means (18) is greater than a second predetermined threshold value which lies above the first predetermined threshold value.
Transponder comprising a receiving and evaluating section and a transmitting section, an energy storage means which is chargeable by an HF interrogation pulse furnished by an interrogation device and furnishes the supply voltage for the receiving and evaluating section and the transmitting section, an identification generator which furnishes identification data fixedly associated therewith and a measurement data generator which receives signals from a sensor and converts them to measurement data, including enabling means connected to provide enabling inputs to the transmitting section for transmitting the identification data only when the supply voltage exceeds a first threshold value and for transmitting the measurement data only when the supply voltage is greater than a second threshold value different than the first threshold value.
Claim 2
Dependent Claim
121 words
Transponder comprising a receiving and evaluating section and a transmitting section, an energy storage means which is chargeable by an HF interrogation pulse furnished by an interrogation device and furnishes the supply voltage for the receiving and evaluating section and the transmitting section, an identification generator which furnishes identification data fixedly associated therewith and a measurement data generator which receives signals from a sensor and converts them to measurement data, including enabling means connected to provide enabling inputs to the transmitting section for transmitting the identification data only when the supply voltage exceeds a first threshold value and for transmitting the measurement data only when the supply voltage is greater than a second threshold value different than the first threshold value.
Claim 3
Dependent Claim
35 words
A transponder according to claim 1, wherein the receiving and evaluating section includes two threshold value switches of which the switching thresholds correspond to the first threshold value and to the second threshold value respectively.
Claim 4
Dependent Claim
58 words
A transponder according to claim 1, including first and second series-connected shift registers, the first shift register connected to receive the measurement data in parallel when the transmitting section is enabled for transmitting the measurement data, and the second shift register connected to receive the identification data when the transmitting section is enabled for transmitting the identification data.
Claim 5
Dependent Claim
83 words
A transponder according to claim 1, wherein the receiving and evaluating section includes two threshold-value switches having threshold corresponding respectively to the first and second threshold values; and the transmitting section includes first and second series-connected shift registers, the first shift register connected to receive the measurement data in parallel when the transmitting section is enabled for transmitting the measurement data, and the second shift register connected to receive the identification data when the transmitting section is enabled for transmitting the identification data.