ACTIVE CMOS RECOVERY UNITS FOR WIRELESS POWER TRANSMISSION
First Claim
1. A rectifying circuit adapted to rectify an RF signal supplied by an antenna receiving electromagnetic waves, the rectifying circuit comprising:
- a first NMOS transistor having a source terminal receiving a ground potential and a gate terminal receiving a biasing voltage;
a second NMOS transistor having a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential;
an impedance matching network disposed between the antenna and the drain terminals of the first and second NMOS transistors; and
an RF block circuit coupled between the drain terminals of the first and second NMOS transistors and an output terminal of the rectifying circuit, said RF block circuit adapted to block the RF signal from arriving at the output terminal of the rectifying circuit.
1 Assignment
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Accused Products
Abstract
A rectifying circuit includes, in part, first and second NMOS transistors, an impedance matching network, and an RF block circuit. The source and gate terminals of the first NMOS transistor respectively receive the ground potential and a biasing voltage. The second NMOS transistor has a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential. The impedance matching network is disposed between the antenna and the drain terminals of the first and second NMOS transistors. The RF block circuit is coupled between the drain terminals of the first and second NMOS transistors and the output terminal of the rectifying circuit. The RF block circuit is adapted to prevent the RF signal from flowing into the output terminal of the rectifying circuit.
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Citations
33 Claims
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1. A rectifying circuit adapted to rectify an RF signal supplied by an antenna receiving electromagnetic waves, the rectifying circuit comprising:
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a first NMOS transistor having a source terminal receiving a ground potential and a gate terminal receiving a biasing voltage; a second NMOS transistor having a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential; an impedance matching network disposed between the antenna and the drain terminals of the first and second NMOS transistors; and an RF block circuit coupled between the drain terminals of the first and second NMOS transistors and an output terminal of the rectifying circuit, said RF block circuit adapted to block the RF signal from arriving at the output terminal of the rectifying circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A rectifying circuit adapted to rectify an RF signal supplied by an antenna receiving electromagnetic waves, the rectifying circuit comprising:
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an NMOS transistor having a source terminal receiving a ground potential; an impedance matching network disposed between the antenna and the drain terminal of the NMOS transistor; an RF block circuit coupled between the drain terminal of the NMOS transistor and an output terminal of the rectifying circuit, said RF block circuit adapted to block the RF signal from arriving at the output terminal of the rectifying circuit; and a gate driver circuit driving a gate terminal of the NMOS transistor in response to an output voltage present at the output terminal of the rectifying circuit. - View Dependent Claims (15, 16, 17)
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18. A method of rectifying an RF signal delivered by an antenna, said antenna delivering the RF signal in response to electromagnetic waves incident thereon, the method comprising:
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applying a biasing voltage to a gate terminal of a first NMOS transistor having a source terminal receiving a ground potential; applying the biasing voltage to a gate terminal of a second NMOS transistor having a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential; matching an impedance of the antenna to an impedance of the drain terminals of the first and second NMOS transistor; and blocking the RF signal from arriving at an output terminal carrying the rectified signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 33)
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30. A method of rectifying an RF signal delivered by an antenna, said antenna delivering the RF signal in response to electromagnetic waves incident thereon, the method comprising:
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driving a gate terminal of an NMOS transistor in response to the rectified signal; applying a ground potential to a source terminal of the NMOS transistor; matching an impedance of the antenna to an impedance of the drain terminal of the NMOS transistor; and blocking the RF signal from arriving at an output terminal carrying the rectified signal. - View Dependent Claims (32)
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Specification