EP0446519A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Noncontact integrated circuit card
Assignee: Mitsubishi Electric Corp
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Filing: 1990-10-16
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Granted: —
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Expires: 2010-10-16
Abstract
Abstract A noncontact IC card comprises a data transmit-receive circuit (15, 16) for transmitting and receiving data to and from outside in a noncontact manner, a detection circuit (32, 34) for detecting a trigger signal from a signal received by the data transmit-receive circuit (15, 16), a data process circuit (11) connected to the data transmit-receive circuit (15, 16) for processing the data, a clock generating circuit (19, 29) for supplying a clock signal to the data process circuit (11), an actuating circuit (35 to 39) for actuating the clock generating circuit in response to the detection of the trigger signal by the detection circuit, and a battery (17) for supplying electric power to each of the above circuits.
Inventors
- 👤 Kenichi C/O Kitaitami Seisakusho Takahira
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 03:16
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203; G06F1/3206; G06F1/3215; B; B61; B61L; B61L25/00; B61L25/02; B61L25/04; B61L25/043; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0723; G08; G08G; G08G1/00; G08G1/01; G08G1/017
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
90 words
A noncontact IC card, comprising: data transmit-receive means for transmitting and receiving data to and from outside in a noncontact manner; detection means for detecting a trigger signal from a signal received by said data transmit-receive means; data process means connected to said data transmit-receive means for processing data; clock generating means for supplying a clock signal to said data process means; actuating means for actuating said clock generating means when said detection means detects a trigger signal; and a battery for supplying electric power to each of said means.
Claim 2
Dependent Claim
34 words
A noncontact IC card as claimed in claim 1, wherein said data transmit-receive means comprises an antenna circuit and a modulation circuit and a demodulation circuit which are respectively connected to said antenna circuit.
Claim 3
Dependent Claim
19 words
A noncontact IC card as claimed in claim 2, wherein said detection means is mounted in said demodulation circuit.
Claim 4
Dependent Claim
31 words
A noncontact IC card as claimed in claim 3, wherein said detection means discriminates between a trigger signal and a data signal in a signal which said data transmit-receive means receives.
Claim 5
Dependent Claim
30 words
A noncontact IC card as claimed in claim 4, wherein said detection means discriminates between a trigger signal and a data signal based on difference in amplitude between said signals.
Claim 6
Dependent Claim
24 words
A noncontact IC card as claimed in claim 1, further comprising a data memory means connected to said data process means for storing data.
Claim 7
Dependent Claim
123 words
A noncontact IC card, comprising: data transmit-receive means for transmitting and receiving data to and from outside in a noncontact manner; detection means for detecting a trigger signal from a signal received by said data transmit-receive means; data process means connected to said data transmit-receive means for processing data; clock generating means for supplying a clock signal to said data process means; actuating means for actuating said clock generating means when said detection means detects a trigger signal; first stop means for stopping said clock generating means after said data process means inputs a clock signal from said clock generating means actuated by said actuating means and executes a predetermined process; and a battery for supplying electric power to each of said means.
Claim 8
Dependent Claim
34 words
A noncontact IC card as claimed in claim 7, wherein said data transmit-receive means includes an antenna circuit and a modulation circuit and a demodulation circuit which are respectively connected to said antenna circuit.
Claim 9
Dependent Claim
19 words
A noncontact IC card as claimed in claim 8, wherein said detection means is mounted in said demodulation circuit.
Claim 10
Dependent Claim
31 words
A noncontact IC card as claimed in claim 9, wherein said detection means discriminates between a trigger signal and a data signal in a signal which said data transmit-receive means receives.
Claim 11
Dependent Claim
30 words
A noncontact IC card as claimed in claim 10, wherein said detection means discriminates between a trigger signal and a data signal based on difference in amplitude between said signals.
Claim 12
Dependent Claim
24 words
A noncontact IC card as claimed in claim 7, further comprising a data memory means connected to said data process means for storing data.
Claim 13
Dependent Claim
24 words
A noncontact IC card as claimed in claim 7, wherein said first stop means is operated by an instruction from said data process means.
Claim 14
Dependent Claim
193 words
A noncontact IC card, comprising: data transmit-receive means for transmitting and receiving data to and from outside in a noncontact manner; detection means for detecting a leading edge of a trigger signal from a signal received by said data transmit-receive means; data process means connected to said data transmit-receive means for processing data and transmitting a response signal when said data transmit-receive means receives a trigger signal; clock generating means for supplying a clock signal to said data process means; actuating means for actuating said clock generating means when said detection means detects a trigger signal; first stop means for stopping said clock generating means after said data process means inputs a clock signal from said clock generating means actuated by said actuating means and executes a predetermined process; measuring means for measuring the time required from when said data process means transmits said response signal through said data transmit-receive means until said data transmit-receive means receives subsequent data; second stop means for stopping said clock generating means when the required time measured by said measuring means exceeds a predetermined value; and a battery for supplying electric power to each of said means.
Claim 15
Dependent Claim
34 words
A noncontact IC card as claimed in claim 14, wherein said data transmit-receive means comprises an antenna circuit and a modulation circuit and a demodulation circuit which are respectively connected to said antenna circuit.
Claim 16
Dependent Claim
19 words
A noncontact IC card as claimed in claim 15, wherein said detection means is mounted in said demodulation circuit.
Claim 17
Dependent Claim
31 words
A noncontact IC card as claimed in claim 16, wherein said detection means discriminates between a trigger signal and a data signal in a signal which said data transmit-receive means receives.
Claim 18
Dependent Claim
30 words
A noncontact IC card as claimed in claim 17, wherein said detection means discriminates between a trigger signal and a data signal based on difference in amplitude between said signals.
Claim 19
Dependent Claim
24 words
A noncontact IC card as claimed in claim 14, further comprising a data memory means connected to said data process means for storing data.
Claim 20
Dependent Claim
24 words
A noncontact IC card as claimed in claim 14, wherein said first stop means is operated by an instruction from said data process means.
Claim 21
Dependent Claim
25 words
A noncontact IC card substantially as hereinbefore described with reference to the embodiments described herein and Figures 1 to 4 of of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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