Non-contact IC card
First Claim
1. A non-contact IC card comprising:
- power receiving means for receiving power from a terminal device without direct electrical connection to said terminal device;
signal processing means connected to said power receiving means for processing a signal;
signal transmitting/receiving means connected to said signal processing means for exchanging signals between said terminal device and said signal processing means; and
power consuming means sequentially controlled by said signal processing means to consume electrical power when the consumption of electrical power by said signal processing means and said signal transmitting/receiving means is relatively small.
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Accused Products
Abstract
A non-contact IC card for receiving electrical power from and exchanging signals with a terminal device without contact has a power consuming circuit which consumes electrical power when the electrical power consumption in the IC card is small. The rate of power consumption by the power consuming circuit is controllable in accordance with the state of the IC card, such as a stand-by state, receiving state, transmitting state, and signal processing state. The power consuming circuit includes a series connection of a switching element and a resistor connected between high-voltage and grounding terminals. The state of the switching element is sequentially controlled by a microcomputer. The control of the power consumption is attained by selecting one of a plurality of the power consuming circuits having different resistance values.
39 Citations
8 Claims
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1. A non-contact IC card comprising:
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power receiving means for receiving power from a terminal device without direct electrical connection to said terminal device; signal processing means connected to said power receiving means for processing a signal; signal transmitting/receiving means connected to said signal processing means for exchanging signals between said terminal device and said signal processing means; and power consuming means sequentially controlled by said signal processing means to consume electrical power when the consumption of electrical power by said signal processing means and said signal transmitting/receiving means is relatively small. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification