INDUCTIVELY COUPLED POWER TRANSFER RECEIVER
First Claim
1. An inductively coupled power transfer receiver including:
- a. a tunable circuit including a power receiving coil in series with a first capacitance and a first variable impedance connected in parallel with the power receiving coil, wherein the first variable impedance includes;
i. at least one impedance element; and
ii. one or more semiconductor devices for controlling the effective impedance of the at least one impedance element thereby varying the impedance of the first variable impedance; and
b. a power supply circuit which regulates power supplied to an output of the power supply circuit by controlling the operation of the one or more semiconductor devices.
4 Assignments
0 Petitions
Accused Products
Abstract
An inductively coupled power transfer receiver including a tunable circuit and a power supply circuit. The tunable circuit includes a power receiving coil in series with a first capacitance and a first variable impedance connected in parallel with the power receiving coil. The variable impedance includes at least one impedance element and one or more semiconductor devices for controlling the effective impedance of the first variable impedance. The first variable impedance may be a second capacitance in series with the first semiconductor device; an inductance in parallel with the first semiconductor device; a second capacitance in parallel with the first semiconductor device; or a capacitance and an inductor in parallel with the first semiconductor device. The power supply circuit includes a power control circuit which provides a control signal to the first variable impedance based on an output voltage produced by the power supply circuit.
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Citations
21 Claims
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1. An inductively coupled power transfer receiver including:
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a. a tunable circuit including a power receiving coil in series with a first capacitance and a first variable impedance connected in parallel with the power receiving coil, wherein the first variable impedance includes; i. at least one impedance element; and ii. one or more semiconductor devices for controlling the effective impedance of the at least one impedance element thereby varying the impedance of the first variable impedance; and b. a power supply circuit which regulates power supplied to an output of the power supply circuit by controlling the operation of the one or more semiconductor devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification