Transponder
First Claim
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1. A device comprising:
- inductive coil means for receiving and transmitting, said inductive coil means having a first portion and a second portion;
said first portion adapted to receive first signals from an external magnetic field generated at a first frequency, wherein said first signals are any one of power signals and information signals;
means for generating second information signals at a second frequency, said means for generating second information signals being coupled to said inductive coil means at said second portion;
said second portion being adapted to transmit said second information signals at said second frequency simultaneously and independently of said first signals, wherein said second portion overlaps at least a part of said first portion.
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Abstract
A portable passive transponder utilizes a single inductive coil transmission and reception system along with a single component rectifying means that is integratable on a single chip. The single coil is adapted to receive a power and/or information signal from an interrogator and transmit another signal simultaneously and independently of the power and/or information signal. A phase coherent frequency multiplier is also utilized which allows higher frequencies than the power signal to be generated, transmitted, and coherently detected.
187 Citations
62 Claims
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1. A device comprising:
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inductive coil means for receiving and transmitting, said inductive coil means having a first portion and a second portion; said first portion adapted to receive first signals from an external magnetic field generated at a first frequency, wherein said first signals are any one of power signals and information signals; means for generating second information signals at a second frequency, said means for generating second information signals being coupled to said inductive coil means at said second portion; said second portion being adapted to transmit said second information signals at said second frequency simultaneously and independently of said first signals, wherein said second portion overlaps at least a part of said first portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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35. A transponder for communicating with a base section, said base section adapted for at least one of powering and interrogation of the transponder, said transponder comprising:
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inductive means having a first portion for receiving an inductive powering field of a first frequency, said field inducing a first signal in said first portion, rectifier means for rectifying said first signal, said rectifier means being coupled between one side of said inductive means and a reference potential point, storage means for storing the rectified first signal in the form of a voltage, said storage means being coupled between another side of said inductive means and said reference point, said another side of said inductive means being a voltage potential point when said inductive means receives said inductive powering field, said storage means adapted to provide voltage to said voltage point, and driver means being selectively coupled to said inductive means enabled to provide a conductive path through at least a second portion of said inductive means such that, when said conductive path is provided, a current produces, in at least said second portion, a second signal irradiating at a second frequency, said inductive means being adapted to simultaneously receive said inductive powering field in said first portion and the second portion of the inductive means overlapping at least a part of the first portion. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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- 46. In combination, inductive field receiving means, driver means coupled to said inductive field receiving means, rectifier means coupled to said inductive field receiving means and charge storage means coupled to said inductive field receiving means, said combination providing a passive transponder, and said receiving means having a first portion for receiving an inductive powering field of a first frequency and being adapted to provide power for transmitting an information signal when under the influence of the inductive powering field, wherein said receiving means also includes a second transmitting portion arranged to transmit said information signal at a second frequency, simultaneously and independently of the first signal, the first and second portions at least partially overlapping each other.
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50. A device comprising:
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a single inductive coil having a first portion and a second portion; said first portion adapted to receive first signals from an external magnetic field generated at a first frequency, wherein said first signals are any one of power signals and information signals; means for generating second information signals at a second frequency coupled to said second portion; said second portion adapted to transmit said second information signals at said second frequency simultaneously and independently of said first signals, wherein said second portion at least partially overlaps said first portion.
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Specification