Modulation circuit and method
First Claim
1. A modulation circuit for modulating a wireless power transfer circuit,the modulation circuit having a switching circuit having a first state and a second state;
- the modulation circuit having a modulation mode in which the first state defines a normal state and the second state defines an operative state,wherein in the operative state, the modulation circuit is configured to modulate an electrical parameter of the wireless power transfer circuit in a modulation direction,the modulation circuit further configured to apply a trial modulation to the electrical parameter to determine whether the modulation direction matches a desired modulation direction, andthe modulation circuit further configured to apply a modulation translation responsive to the modulation direction differing from the desired modulation direction, the modulation translation changing the modulation mode by swapping the first and second states such that the second state defines the normal state and the first state defines the operative state.
1 Assignment
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Accused Products
Abstract
The present invention provides a modulation circuit and a method for modulating a wireless power transfer circuit. The modulation circuit has a switching circuit having a first state and a second state. The modulation circuit also has a modulation mode in which the first state defines a normal state and the second state defines an operative state. In the operative state, the modulation circuit modulates an electrical parameter of the wireless power transfer circuit in a modulation direction. The modulation circuit is configured to apply a trial modulation to the electrical parameter to determine whether the modulation direction is in a desired modulation direction. The modulation circuit is also configured to apply a modulation translation if the modulation direction is not in the desired modulation direction, with the modulation translation changing the modulation mode such that the modulation direction is in the desired modulation direction.
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Citations
21 Claims
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1. A modulation circuit for modulating a wireless power transfer circuit,
the modulation circuit having a switching circuit having a first state and a second state; -
the modulation circuit having a modulation mode in which the first state defines a normal state and the second state defines an operative state, wherein in the operative state, the modulation circuit is configured to modulate an electrical parameter of the wireless power transfer circuit in a modulation direction, the modulation circuit further configured to apply a trial modulation to the electrical parameter to determine whether the modulation direction matches a desired modulation direction, and the modulation circuit further configured to apply a modulation translation responsive to the modulation direction differing from the desired modulation direction, the modulation translation changing the modulation mode by swapping the first and second states such that the second state defines the normal state and the first state defines the operative state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A modulation circuit for modulating a wireless power transfer circuit,
the modulation circuit having a switching circuit having a first state, a second state, and a third state, the modulation circuit having a modulation mode in which the first state defines a normal state and the second state defines an operative state, wherein in the operative state, the modulation circuit is configured to modulate an electrical parameter of the wireless power transfer circuit in a modulation direction, the modulation circuit further configured to apply a trial modulation to the electrical parameter to determine whether the modulation direction matches a desired modulation direction, and the modulation circuit further configured to apply a modulation translation responsive to the modulation direction differing from the desired modulation direction, the modulation translation changing the modulation mode by swapping the second and third states such that the third state defines the operative state.
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16. A method of modulating a wireless power transfer circuit, the method including:
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modulating, in an operative state, an electrical parameter of the wireless power transfer circuit in a modulation direction; applying a trial modulation to the electrical parameter to determine whether the modulation direction matches a desired modulation direction; and applying a modulation translation responsive to the modulation direction differing from the desired modulation direction, the modulation translation causing the modulation direction to match the desired modulation direction. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification