Identification card including switching means for built-in battery
First Claim
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1. An identification card comprising:
- a built-in type battery;
means for processing data necessary for the identification card;
storage means for storing at least said data upon being energized by said battery;
first switching means interposed between said battery and said storage means; and
switching control means, energized by said battery, for controlling said switching means to be turned off in a first condition and to be turned on in a second condition in response to a command signal externally supplied via said identification card to said switching control means, whereby said storage means is not energized by said battery in the first condition, but is energized in the second condition.
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Abstract
An identification card such as an IC card includes a built-in type battery, a central processing unit, a RAM, an FET switch and a latch circuit. An IC card production, the RAM is not energized by the battery when the FET switch is turned off in conjunction with the latch circuit. When the IC card is first used by an card issuer, the RAM is energized by turning on the FET switch in conjunction with the latch circuit.
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Citations
12 Claims
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1. An identification card comprising:
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a built-in type battery; means for processing data necessary for the identification card; storage means for storing at least said data upon being energized by said battery; first switching means interposed between said battery and said storage means; and switching control means, energized by said battery, for controlling said switching means to be turned off in a first condition and to be turned on in a second condition in response to a command signal externally supplied via said identification card to said switching control means, whereby said storage means is not energized by said battery in the first condition, but is energized in the second condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An identification card comprising:
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a built-in type battery; means for processing first data necessary for the identification card and second data necessary for arithmetic operations; storage means for storing said first and second data upon being energized by said battery; first switching means interposed between said battery and said storage means; and switching control means, energized by said battery, for controlling said switching means to be turned off in a first condition and to be turned on in a second condition in response to a command signal externally supplied via said identification card to said switching control means, whereby said storage means is not energized by said battery in the first condition, but is energized in the second condition. - View Dependent Claims (11, 12)
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Specification