US4818855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification system
Assignee: HID Global Corp
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Filing: 1986-01-07
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Granted: 1989-04-04
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Expires: 2006-01-07
Abstract
Abstract A remotely powered portable member having circuitry for storing and transmitting coded information. A first coupling device is provided for receiving a signal transmitted via one of a magnetic field and an electric field. A power circuit is connected to the first coupling device for deriving operating power from the received signal for use by the circuitry. A second coupling device is connected to the circuitry for transmitting coded information stored by the circuitry via the other one of the magnetic field and electric field.
Inventors
- 👤 Ronald W. Mongeon
- 👤 David P. Sidlauskas
- 👤 Theodore D. Geiszler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:20
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07749; G06K19/07773; G06K19/07788; G06K19/0723; G06K7/00; G06K7/0008; G06K7/10; G06K7/10009; G06K7/10316; G06K7/10326; G07; G07C; G07C9/00; G07C9/20; G07C9/28
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
112 words
In a remotely powered portable member having circuitry for storing and transmitting coded information, the improvement comprising: first coupling means for receiving a signal of a predetermined frequency transmitted via one of a magnetic field and an electric field; power means connected to said first coupling means for deriving operating power from the received signal for use by said circuitry; circuit means connecting said circuitry to said first coupling means, for utilizing said predetermined frequency as a clock signal for timing of said circuitry; and second coupling means connected to said circuitry for transmitting coded information stored by said circuitry via the other one of the magnetic field and the electric field.
Claim 2
Dependent Claim
112 words
In a remotely powered portable member having circuitry for storing and transmitting coded information, the improvement comprising: first coupling means for receiving a signal of a predetermined frequency transmitted via one of a magnetic field and an electric field; power means connected to said first coupling means for deriving operating power from the received signal for use by said circuitry; circuit means connecting said circuitry to said first coupling means, for utilizing said predetermined frequency as a clock signal for timing of said circuitry; and second coupling means connected to said circuitry for transmitting coded information stored by said circuitry via the other one of the magnetic field and the electric field.
Claim 3
Dependent Claim
45 words
A portable member as defined in claim 1, wherein said first coupling means is a magnetic field coupling means for receiving a signal via a magnetic field and said second coupling means is an electrostatic coupling means for transmitting coded information via an electric field.
Claim 4
Dependent Claim
21 words
A portable member as defined in claim 1, wherein said circuitry includes a programmable read only memory for storing coded information.
Claim 5
Dependent Claim
81 words
A portable member as defined in claim 3, wherein: said programmable read only memory is an electrically alterable read only memory; said signal of a predetermined frequency is a modulated carrier signal; and said circuitry further includes programming means, connected to said first coupling means, for detecting a modulated carrier signal which contains programming information, said programming means being connected to said electrically alterable read only memory for programming said electrically alterable read only memory in accordance with said programming information.
Claim 6
Dependent Claim
45 words
A portable member as defined in claim 4, wherein said first coupling means is a magnetic field coupling means for receiving a signal via a magnetic field and said second coupling means is an electrostatic coupling means for transmitting coded information via an electric field.
Claim 7
Dependent Claim
73 words
A portable member as defined in claim 1, wherein said circuitry includes frequency dividing means connected to said first coupling means for deriving a carrier signal having a frequency which is sub-multiple of the predetermined frequency and modulating means having an output connected to said second coupling means, one input coupled to the carrier signal and another input coupled for receiving the coded information for modulating the carrier signal with the coded information.
Claim 8
Dependent Claim
67 words
A portable member as defined in claim 1, wherein said circuitry includes a local oscillator for producing a carrier signal which has a frequency generated independently of the predetermined frequency, and modulating means having an output connected to said second coupling means, one input coupled to the carrier signal and another input coupled for receiving the coded information for modulating the carrier signal with the coded information.
Claim 9
Dependent Claim
25 words
A portable member as defined in claim 7, wherein said local oscillator produces a carrier signal having a frequency substantially higher than the predetermined frequency.
Claim 10
Dependent Claim
86 words
A portable member as defined in claim 1, wherein said circuitry includes: carrier signal means for producing a carrier signal; modulating means having an input connected to said carrier signal means, another input coupled for receiving the coded information and an output, said modulating means modulating the carrier signal with the coded information to produce a modulated carrier signal at said output; and voltage multiplier means connected between said modulating means and said second coupling means for increasing the voltage magnitude of the modulated carrier signal.
Claim 11
Dependent Claim
15 words
A portable member as defined in claim 9, wherein said voltage multiplier means is passive.
Claim 12
Dependent Claim
33 words
A portable member as defined in claim 10, wherein said voltage multiplier means includes a series connected inductor and capacitor having a common connection point which is connected to said second coupling means
Claim 13
Dependent Claim
16 words
A portable member as defined in claim 10, wherein said voltage multiplier means includes an autotransformer.
Claim 14
Dependent Claim
64 words
A portable member as defined in claim 1, wherein said circuitry includes carrier signal means for producing a carrier signal; modulating means having an input connected to said carrier signal means, another input coupled for receiving the coded information, and an output connected to said second coupling means, said modulating means modulating the carrier signal to produce a modulated carrier signal at said output.
Claim 15
Dependent Claim
16 words
A portable member as defined in claim 13, wherein said modulating means comprises an amplitiude modulator.
Claim 16
Dependent Claim
16 words
A portable member as defined in claim 13, wherein said modulating means comprises a phase modulator.
Claim 17
Dependent Claim
16 words
A portable member as defined in claim 13, wherein said modulating means comprises a frequency modulator.
Claim 18
Dependent Claim
40 words
A portable member as defined in claim 2, wherein said first coupling means comprises a coil and said second coupling means comprises an electrostatic antenna and said coil and said antenna are mounted to be substantially coplanar with one another.
Claim 19
Dependent Claim
21 words
A portable member as defined in claim 17, wherein said coil and said antenna are coaxially positioned relative to one another.
Claim 20
Dependent Claim
29 words
A portable member as defined in claim 1, wherein said member is in the form of a tag, card, badge, ring, watch, or other similar type of portable article.
Claim 21
Dependent Claim
132 words
A remotely powered portable member having circuitry for storing and transmitting coded information comprising: a read-only memory for storing coded information first coupling means for receiving a signal of a predetermined frequency transmitted via a magnetic field; power means connected to said first coupling means for deriving power from the received signal for use by the circuitry in said portable member; circuit means, connected to said first coupling means and responsive to said predetermined frequency of a received signal, for reading said coded information from said read only memory; means for generating a carrier signal; modulating means for modulating said carrier signal with the read coded information from said memory; and second coupling means connected to the output of said modulating means for transmitting the modulated carrier signal via an electric field.
Claim 22
Dependent Claim
132 words
A remotely powered portable member having circuitry for storing and transmitting coded information comprising: a read-only memory for storing coded information first coupling means for receiving a signal of a predetermined frequency transmitted via a magnetic field; power means connected to said first coupling means for deriving power from the received signal for use by the circuitry in said portable member; circuit means, connected to said first coupling means and responsive to said predetermined frequency of a received signal, for reading said coded information from said read only memory; means for generating a carrier signal; modulating means for modulating said carrier signal with the read coded information from said memory; and second coupling means connected to the output of said modulating means for transmitting the modulated carrier signal via an electric field.
Claim 23
Dependent Claim
29 words
A portable member as defined in claim 20, wherein said means for generating a carrier signal generates a carrier signal whose frequency is a sub-multiple of said predetermined frequency.
Claim 24
Dependent Claim
52 words
A portable member as defined in claim 21, wherein said means for reading said memory and said means for generating a carrier signal are both realized by a frequency divider having a plurality of outputs connected to address lines of said memory and a further output connected to said means for modulating.
Claim 25
Dependent Claim
17 words
A portable device as defined in claim 22, wherein said means for modulating comprises a phase modulator.
Claim 26
Dependent Claim
16 words
A portable device as defined in claim 23, wherein said phase modulator comprises an exclusive OR-gate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |