Identification system
AssigneeIndala Corporation
InventorsRonald W. Mongeon, David P. Sidlauskas, Theodore D. Geiszler
Life of this patent
Estimating the term…
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.
Claims24
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.
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.
Dependencies are inferred from the claim text.