Data carrier with regulation of the power consumption
First Claim
Patent Images
1. A data carrier, comprising:
- at least one transmitting/receiving antenna;
at least one circuit unit having supply voltage terminals;
a rectifier circuit connected downstream of said at least one transmitting/receiving antenna and serving for providing a supply voltage for said at least one circuit unit;
a voltage regulating circuit connected in parallel with said supply voltage terminals of said at least one circuit unit and connected to said rectifier circuit, said voltage regulating circuit having an output for tapping off a signal proportional to a regulating signal of said voltage regulating circuit; and
a controllable clock signal generator having a control input connected to said output of said voltage regulating circuit, said controllable clock signal generator connected to said at least one circuit unit and outputs a clock signal received by said at least one circuit unit.
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Abstract
A data carrier, in particular a smart card, is described and has at least one transmitting/receiving antenna and also a rectifier circuit connected downstream thereof and serving for providing a supply voltage for at least one circuit unit. A voltage regulating circuit is connected in parallel with the supply voltage terminals of the circuit unit. The voltage regulating circuit has an output at which a signal proportional to a regulating signal of the voltage regulating circuit can be tapped off. This output is connected to the control input of a controllable clock signal generator, which provides the clock signal for the at least one circuit unit.
10 Citations
4 Claims
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1. A data carrier, comprising:
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at least one transmitting/receiving antenna;
at least one circuit unit having supply voltage terminals;
a rectifier circuit connected downstream of said at least one transmitting/receiving antenna and serving for providing a supply voltage for said at least one circuit unit;
a voltage regulating circuit connected in parallel with said supply voltage terminals of said at least one circuit unit and connected to said rectifier circuit, said voltage regulating circuit having an output for tapping off a signal proportional to a regulating signal of said voltage regulating circuit; and
a controllable clock signal generator having a control input connected to said output of said voltage regulating circuit, said controllable clock signal generator connected to said at least one circuit unit and outputs a clock signal received by said at least one circuit unit. - View Dependent Claims (2, 3)
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4. A smart card, comprising:
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at least one transmitting/receiving antenna;
at least one circuit unit having supply voltage terminals;
a rectifier circuit connected downstream of said at least one transmitting/receiving antenna and serving for providing a supply voltage for said at least one circuit unit;
a voltage regulating circuit connected in parallel with said supply voltage terminals of said at least one circuit unit and connected to said rectifier circuit, said voltage regulating circuit having an output for tapping off a signal proportional to a regulating signal of said voltage regulating circuit; and
a controllable clock signal generator having a control input connected to said output of said voltage regulating circuit, said controllable clock signal generator connected to said at least one circuit unit and outputs a clock signal received by said at least one circuit unit.
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Specification