Multiple RF-port modulator for RFID tag
First Claim
Patent Images
1. An integrated circuit chip for use with a Radio Frequency Identification (RFID) tag having an antenna structure with at least three coupling ends for mounting on the chip, the chip comprising:
- at least three nodes corresponding respectively to the at least three coupling ends; and
a modulator switch including;
a first antenna transistor having a first switching terminal coupled to a first one of the at least three nodes, a fourth switching terminal, and a first gate terminal,a second antenna transistor having a second switching terminal coupled to a second one of the at least three nodes, a fifth switching terminal, and a second gate terminal, anda common transistor having a third switching terminal coupled to the fourth and fifth switching terminals, a sixth switching terminal coupled to a third one of the at least three nodes, and a third gate terminal coupled to the first and second gate terminals.
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Accused Products
Abstract
Apparatus and systems may include integrated circuits for use with Radio Frequency Identification (RFID) tags having an antenna structure with at least three coupling ends. The integrated circuits may include three or more nodes corresponding respectively to the at least three coupling ends, and a modulator switch to receive a single modulator switching signal input. Methods may include those used to form and operate such circuits. Additional apparatus, systems, and methods are disclosed.
38 Citations
18 Claims
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1. An integrated circuit chip for use with a Radio Frequency Identification (RFID) tag having an antenna structure with at least three coupling ends for mounting on the chip, the chip comprising:
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at least three nodes corresponding respectively to the at least three coupling ends; and a modulator switch including; a first antenna transistor having a first switching terminal coupled to a first one of the at least three nodes, a fourth switching terminal, and a first gate terminal, a second antenna transistor having a second switching terminal coupled to a second one of the at least three nodes, a fifth switching terminal, and a second gate terminal, and a common transistor having a third switching terminal coupled to the fourth and fifth switching terminals, a sixth switching terminal coupled to a third one of the at least three nodes, and a third gate terminal coupled to the first and second gate terminals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A Radio Frequency Identification (RFID) tag, comprising:
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an inlay; an antenna structure on the inlay that has at least three coupling ends; and a circuit for driving the antenna structure from the at least three coupling ends, the circuit comprising; at least three nodes coupled respectively to the at least three coupling ends, a first antenna transistor having a first switching terminal coupled to a first one of the at least three nodes, a fourth switching terminal, and a first gate terminal, a second antenna transistor having a second switching terminal coupled to a second one of the at least three nodes, a fifth switching terminal, and a second gate terminal, and a common transistor having a third switching terminal coupled to the fourth and fifth switching terminals, a sixth switching terminal coupled to a third one of the at least three nodes, and a third gate terminal coupled to the first and second gate terminals. - View Dependent Claims (8, 9, 10, 11)
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12. A method, comprising:
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providing schematic-type inputs for the purpose of preparing a layout that embodies the schematic-type inputs, in which, if the layout is incorporated in a tapeout file that is used by mask making machinery as instructions for processing a semiconductor wafer, an integrated circuit will result on the wafer according to the schematic-type inputs, the integrated circuit comprising; at least three nodes corresponding respectively to the at least three coupling ends; and a modulator switch including; a first antenna transistor having a first switching terminal coupled to a first one of the at least three nodes, a fourth switching terminal, and a first gate terminal, a second antenna transistor having a second switching terminal coupled to a second one of the at least three nodes, a fifth switching terminal, and a second gate terminal, and a common transistor having a third switching terminal coupled to the fourth and fifth switching terminals, a sixth switching terminal coupled to a third one of the at least three nodes, and a third gate terminal coupled to the first and second gate terminals. - View Dependent Claims (13, 14)
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15. An article comprising a machine-readable memory containing thereon instructions which, if executed by mask making machinery as instructions for processing a semiconductor wafer, an integrated circuit will result on the wafer, comprising:
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at least three nodes corresponding respectively to the at least three coupling ends; and a modulator switch including; a first antenna transistor having a first switching terminal coupled to a first one of the at least three nodes, a fourth switching terminal, and a first gate terminal, a second antenna transistor having a second switching terminal coupled to a second one of the at least three nodes, a fifth switching terminal, and a second gate terminal, and a common transistor having a third switching terminal coupled to the fourth and fifth switching terminals, a sixth switching terminal coupled to a third one of the at least three nodes, and a third gate terminal coupled to the first and second gate terminals. - View Dependent Claims (16, 17, 18)
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Specification