US5241160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for the non-contact transmission of data
Assignee: On Track Innovations Ltd
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Filing: 1992-07-06
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Granted: 1993-08-31
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Expires: 2012-07-06
Abstract
Abstract A data transmission system for the non-contact transmission of data between a station and a portable data carrier. The station includes a station transmitter operating at a predetermined frequency for generating a first signal and a demodulator for detecting a second signal superimposed on the first signal. An antenna is coupled via a length of cable to the station transmitter via a matching circuit so as to be operative at said frequency regardless of the length of the cable. The portable data carrier includes supply means for coupling to a source of electric power and a data carrier tuned antenna circuit inductively coupled with the station transmitter so as to receive power from the station. A data carrier data modulator is provided for modulating the first signal with the second signal in response to data stored within the data carrier and, by means of said inductive coupling, enabling the data to be transmitted from the data carrier to the station.
Inventors
- 👤 Oded Bashan
- 👤 Moshe Aduk
- 👤 Ronnie Gilboa
- 👤 Nehemya Itay
- 👤 Dubi Shure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:45
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/0008; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0723
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
174 words
A system for non-contact transmission of data between a station and a portable data carrier, wherein the station includes: a station transmitter operating at a predetermined frequency for generating a first signal, a matched station antenna coupled via a length of cable to the station transmitter and constructed so as to be operative at said predetermined frequency regardless of the length of cable, and a receiver for receiving a second signal superimposed on the first signal; and wherein the portable data carrier includes: supply means for coupling to a source of electric power, a tuned antenna circuit inductively coupled with the station antenna so as to receive therefrom an induced signal, and a data carrier modulator comprising a decoupling means, said decoupling means decoupling the tuned antenna circuit in the data carrier in response to a first data generated by the data carrier and thereby modulating the first signal with the second signal, and by means of said inductive coupling enabling the first data to be transmitted from the data carrier to the station.
Claim 2
Independent Claim
174 words
A system for non-contact transmission of data between a station and a portable data carrier, wherein the station includes: a station transmitter operating at a predetermined frequency for generating a first signal, a matched station antenna coupled via a length of cable to the station transmitter and constructed so as to be operative at said predetermined frequency regardless of the length of cable, and a receiver for receiving a second signal superimposed on the first signal; and wherein the portable data carrier includes: supply means for coupling to a source of electric power, a tuned antenna circuit inductively coupled with the station antenna so as to receive therefrom an induced signal, and a data carrier modulator comprising a decoupling means, said decoupling means decoupling the tuned antenna circuit in the data carrier in response to a first data generated by the data carrier and thereby modulating the first signal with the second signal, and by means of said inductive coupling enabling the first data to be transmitted from the data carrier to the station.
Claim 3
Dependent Claim
23 words
The system according to claim 1, wherein the tuned antenna circuit comprises a resonant circuit tuned to the frequency of the first signal.
Claim 4
Dependent Claim
22 words
The system according to claim 1, wherein the tuned antenna circuit comprises a matched antenna circuit so as to maximize antenna efficiency.
Claim 5
Dependent Claim
32 words
The system according to claim 2, wherein the supply means is coupled to the tuned antenna circuit and is responsive to the induced signal for supplying electric power to the data carrier.
Claim 6
Dependent Claim
127 words
The system according to claim 2, wherein the station further includes: a station control circuit for deactuating the station transmitter in response to second data stored in the station and, by means of said inductive coupling, deactuating the signal induced in the data carrier tuned antenna circuit; and the data carrier further includes a detector coupled to the data carrier tuned antenna circuit for detecting the state of the induced voltage of the data carrier tuned antenna circuit, a logic circuit coupled to the detector and responsive to said state, whereby an output of the logic circuit corresponds to the second data, and means for coupling the output of the logic circuit to a memory within the data carrier so as to store the second data therein.
Claim 7
Dependent Claim
92 words
In the system according to claim 2, a method for transmitting data from the data carrier to the station, comprising the steps of: transmitting a logic reference bit having a predetermined time period, transmitting a plurality of bits corresponding to said data and having respective time periods, comparing, for each of said plurality of bits, the respective time period with the predetermined time period of the logic reference bit and assigning a respective logic level according to whether the respective time period is greater than or less than the predetermined time period.
Claim 8
Dependent Claim
92 words
In the system according to claim 5, a method for transmitting data from the station to the data carrier, comprising the steps of: transmitting a logic reference bit having a predetermined time period, transmitting a plurality of bits corresponding to said data and having respective time periods, comparing, for each of said plurality of bits, the respective time period with the predetermined time period of the logic reference bit and assigning a respective logic level according to whether the respective time period is greater than or less than the predetermined time period.
Claim 9
Dependent Claim
25 words
The method according to claim 6, wherein the reference bit or each of the plurality of bits are defined as the time period between pulses.
Claim 10
Dependent Claim
26 words
The method according to claim 6, wherein the reference bit or each of the plurality of bits are defined as the time period between logic changes.
Claim 11
Dependent Claim
25 words
The method according to claim 7, wherein the reference bit or each of the plurality of bits are defined as the time period between pulses.
Claim 12
Dependent Claim
26 words
The method according to claim 7, wherein the reference bit or each of the plurality of bits are defined as the time period between logic changes.
Claim 13
Dependent Claim
119 words
A data carrier for transmitting data to a remote receiver tuned to a predetermined frequency, the data carrier comprising: supply means for coupling to a source of electric power, a tuned antenna circuit inductively coupled to a station of the remote receiver antenna for receiving therefrom a first signal having said predetermined frequency and transmitting said first signal, and a modulator having a decoupling means for decoupling the tuned antenna circuit in the data carrier in response to data generated by the data carrier and thereby modulating the first signal with a second signal corresponding to said data and by means of said inductive coupling enabling the data to be transmitted from the data carrier to said remote receiver.
Claim 14
Dependent Claim
119 words
A data carrier for transmitting data to a remote receiver tuned to a predetermined frequency, the data carrier comprising: supply means for coupling to a source of electric power, a tuned antenna circuit inductively coupled to a station of the remote receiver antenna for receiving therefrom a first signal having said predetermined frequency and transmitting said first signal, and a modulator having a decoupling means for decoupling the tuned antenna circuit in the data carrier in response to data generated by the data carrier and thereby modulating the first signal with a second signal corresponding to said data and by means of said inductive coupling enabling the data to be transmitted from the data carrier to said remote receiver.
Claim 15
Dependent Claim
32 words
The system according to claim 3, wherein the supply means is coupled to the tuned antenna circuit and is responsive to the induced signal for supplying electric power to the data carrier.
Claim 16
Dependent Claim
127 words
The system according to claim 3, wherein the station further includes: a station control circuit for deactuating the station transmitter in response to second data stored in the station and, by means of said inductive coupling, deactuating the signal induced in the data carrier tuned antenna circuit; and the data carrier further includes a detector coupled to the data carrier tuned antenna circuit for detecting the state of the induced voltage of the data carrier tuned antenna circuit. a logic circuit coupled to the detector and responsive to said state, whereby an output of the logic circuit corresponds to the second data, and means for coupling the output of the logic circuit to a memory within the data carrier so as to store the second data therein.
Claim 17
Dependent Claim
92 words
In the system according to claim 3, a method for transmitting data from the data carrier to the station, comprising the steps of: transmitting a logic reference bit having a predetermined time period, transmitting a plurality of bits corresponding to said data and having respective time periods, comparing, for each of said plurality of bits, the respective time period with the predetermined time period of the logic reference bit and assigning a respective logic level according to whether the respective time period is greater than or less than the predetermined time period.
Claim 18
Dependent Claim
93 words
In the system according to claim 14, a method for transmitting data from the station to the data carrier, comprising the steps of: transmitting a logic reference bit having a predetermine time period, transmitting a plurality of bits corresponding to said data and having respective time periods, comparing, for each of said plurality of bits, the respective time period with the predetermined time period of the logic reference bit and assigning a respective logic level according to whether the respective time period is greater than or less than the predetermined period time period.
Claim 19
Dependent Claim
25 words
The method according to claim 15, within the reference bit or each of the plurality of bits are defined as the time period between pulses.
Claim 20
Dependent Claim
26 words
The method according to claim 15, wherein the reference bit or each of the plurality of bits are defined as the time period between logic changes.
Claim 21
Dependent Claim
25 words
The method according to claim 16, wherein the reference bit or each of the plurality of bits are defined as the time period between pulses.
Claim 22
Dependent Claim
26 words
The method according to claim 16, wherein the reference bit or each of the plurality of bits are defined as the time period between logic changes.
Claim 23
Dependent Claim
44 words
The system according to claim 1, wherein said matched station antenna includes a matching network which matches an antenna impedance to a cable characteristic impedance Zo to enable the system to operate at various lengths of cable without requiring a returning of the system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-30 | 1997-03-01 | 1997-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-30 | 2001-03-01 | 2001-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-30 | 2005-03-01 | 2005-08-31 | $7700.00 | Window Closed / Lapsed |