Information card system communicable in contactless manner
First Claim
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1. An information card system comprising:
- a) an information card havinga-1) at least first, second and third inductors respectively assigned to an input signal, a periodical signal and an output signal,a-2) a first data processing unit operative to execute program sequences for producing a plurality of output data signals after an initialization,a-3) a non-volatile memory unit associated with said first data processing unit and operative to memorize pieces of data information each represented by one of said output data signals,a-4) a first demodulation unit coupled between said first inductor and said first data processing unit and operative to extract a bit string indicative of a piece of input data information from said input signal,a-5) a separation unit coupled between said second inductor and said first data processing unit and operative to extract a pulse train from said periodical signal and to produce an electric power on the basis of said periodical signal, anda-6) an output unit coupled at an input node thereof to said separation unit and at an control node thereof to said first data processing unit and producing a data output signal in the presence of another output data signal fed from the first data processing unit, said output unit further producing an acknowledge signal in said initialization for transferring to said third inductor as said output signal; and
b) a terminal unit communicable with said information card havingb-1) at least fourth, fifth and sixth inductors capable of respectively facing said first, second and third inductors or said third, second and first inductors in a contactless fashion,b-2) a second data processing unit,b-3) two series combination circuits coupled in parallel between said second data processing unit and said fourth and sixth inductors, each combination circuit operative to produce said input signal or said periodical signal depending upon a job assignment decided by said second data processing unit, andb-4) a combined unit coupled between said fifth inductor and said second data processing unit and operative to relay said output signal to said second data processor and to produce a detection signal indicative of whether or not said acknowledge signal is supplied thereto, wherein said second data processing unit allows one of said two series combination circuits to produce said input signal after receiving said detecting signal indicative of a presence of said acknowledge signal.
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Abstract
An information card system according to the present invention establishes a data communication between a terminal unit and an information card after receipt of an acknowledge signal supplied from the information card to the terminal unit, and the acknowledge signal is produced by a combination of a periodical signal retrieving circuit and an output unit incorporated in the information card upon receiving a periodical signal fed from the terminal unit, so that a misfit between the information card and the terminal unit is detectable before the data communication.
25 Citations
24 Claims
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1. An information card system comprising:
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a) an information card having a-1) at least first, second and third inductors respectively assigned to an input signal, a periodical signal and an output signal, a-2) a first data processing unit operative to execute program sequences for producing a plurality of output data signals after an initialization, a-3) a non-volatile memory unit associated with said first data processing unit and operative to memorize pieces of data information each represented by one of said output data signals, a-4) a first demodulation unit coupled between said first inductor and said first data processing unit and operative to extract a bit string indicative of a piece of input data information from said input signal, a-5) a separation unit coupled between said second inductor and said first data processing unit and operative to extract a pulse train from said periodical signal and to produce an electric power on the basis of said periodical signal, and a-6) an output unit coupled at an input node thereof to said separation unit and at an control node thereof to said first data processing unit and producing a data output signal in the presence of another output data signal fed from the first data processing unit, said output unit further producing an acknowledge signal in said initialization for transferring to said third inductor as said output signal; and b) a terminal unit communicable with said information card having b-1) at least fourth, fifth and sixth inductors capable of respectively facing said first, second and third inductors or said third, second and first inductors in a contactless fashion, b-2) a second data processing unit, b-3) two series combination circuits coupled in parallel between said second data processing unit and said fourth and sixth inductors, each combination circuit operative to produce said input signal or said periodical signal depending upon a job assignment decided by said second data processing unit, and b-4) a combined unit coupled between said fifth inductor and said second data processing unit and operative to relay said output signal to said second data processor and to produce a detection signal indicative of whether or not said acknowledge signal is supplied thereto, wherein said second data processing unit allows one of said two series combination circuits to produce said input signal after receiving said detecting signal indicative of a presence of said acknowledge signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An information card associated with a terminal unit having at least fourth, fifth and sixth inductors, said fourth and sixth inductors assigned to an input signal and a periodical signal depending upon a job assignment decided by said terminal unit, said fifth inductor selectively supplied with an acknowledge signal and a data output signal, said terminal unit operative to produce the input signal or the periodical signal at either of said fourth or sixth inductors, and establishing a data communication for said input signal and said output data signal after a receipt of said acknowledge signal, said information card comprising
a) at least first, second and third inductors capable of respectively facing said at least fourth, fifth and sixth inductors, or said at least sixth, fifth and fourth inductors and assigned to said input signal, said periodical signal and an output signal consisting of said acknowledge signal and said data output signal, b) a first data processing unit operative to execute program sequences for producing a plurality of output data signals after an initialization, c) a non-volatile memory unit associated with said first data processing unit and operative to memorize pieces of data information each represented by one of said output data signals, d) a first demodulation unit coupled between said first inductor and said first data processing unit and operative to extract a bit string indicative of a piece of input data information from said input signal, e) a separation unit coupled between said second inductor and said first data processing unit and operative to extract a pulse train from said periodical signal and to produce an electric power on the basis of the periodical signal, and f) an output unit coupled at an input node thereof to said separation unit and at an control node thereof to said first data processing unit and producing a data output signal in the presence of another output data signal fed from the first data processing unit, said output unit further producing said acknowledge signal in said initialization for transferring to said third inductor as said output signal.
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22. A terminal unit communicable with an information card having at least first, second and third inductors respectively assigned to an input signal, a periodical signal and an output signal, a first data processing unit operative to execute program sequences for producing a plurality of output data signals after an initialization, a non-volatile memory unit associated with said first data processing unit and operative to memorize pieces of data information each represented by one of said output data signals, a first demodulation unit coupled between said first inductor and said first data processing unit and operative to extract a bit string indicative of a piece of input data information from said input signal, a separation unit coupled between said second inductor and said first data processing unit and operative to extract a pulse train from said periodical signal and to produce an electric power on the basis of the periodical signal, an output unit coupled at an input node thereof to said separation unit and at an control node thereof to said first data processing unit and producing a data output signal in the presence of another output data signal fed from the first data processing unit, said output unit further producing an acknowledge signal in said initialization for transferring to said third inductor as said output signal, said terminal unit comprising:
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a) at least fourth, fifth and sixth inductors capable of respectively facing said first, second and third inductors or said third, second and first inductors in a contactless fashion, b) a second data processing unit, c) two series combination circuits coupled in parallel between said second data processing unit and said fourth and sixth inductors, each combination circuit operative to produce said input signal or said periodical signal depending upon a job assignment decided by said second data processing unit, and d) a combined unit coupled between said fifth inductor and said second data processing unit and operative to relay said output signal to said second data processor and to produce a detection signal indicative of whether or not said acknowledge signal is supplied thereto, wherein said second data processing unit allows one of said two series combination circuits to produce said input signal after receiving said detecting signal indicative of a presence of said acknowledge signal. - View Dependent Claims (23, 24)
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Specification