Dynamic tuning in wireless energy transfer systems
First Claim
1. A zero voltage switching device comprising:
- a switch comprising a first terminal, a second terminal, and a control terminal;
a first comparator comprising a first-comparator output terminal and a first-comparator first input terminal electrically connected to the first terminal of the switch;
a second comparator comprising a second-comparator output terminal, a second-comparator first input terminal electrically connected to a first reference voltage, and a second-comparator second input terminal electrically connected to the control terminal of the switch; and
control circuitry coupled with the first-comparator output terminal and the second-comparator output terminal, the control circuitry comprising;
a phase detection circuit coupled with the first-comparator output terminal and the second-comparator output terminal;
an integrator circuit coupled with the phase detection circuit;
a third comparator comprising a third-comparator output terminal, a third-comparator first input terminal electrically connected to the first terminal of the switch, and a third-comparator second input terminal coupled with the integrator circuit;
a flip-flop comprising a reset terminal, a clock terminal electrically connected to the third-comparator output terminal, and an output terminal electrically connected to the control terminal of the switch; and
a controller coupled with the reset terminal of the flip-flop and configured to provide a reset signal to the flip-flop, andwherein the control circuitry is configured to;
determine a phase difference between a first-comparator output signal and a second-comparator output signal,generate a second reference voltage based the phase difference, andcause a control signal to be applied to the control terminal of the switch upon detecting that a voltage signal at one of the first terminal or second terminal of the switch has crossed a voltage value equal to the second reference voltage.
1 Assignment
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Accused Products
Abstract
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically tuning circuit elements. One aspect includes a zero voltage switching device including a switch, a first comparator, a second comparator and a controller. The switch includes a first terminal, a second terminal, and a control terminal. The first comparator includes a first input terminal electrically connected to the second terminal of the switch and a second input terminal electrically connected to the first terminal of the switch. The second comparator includes a first input terminal electrically connected to a reference voltage and a second input terminal electrically connected to the control terminal of the switch. The controller is configured to: detect a zero voltage condition across the switch, and, in response, cause a control signal to be applied to the control terminal of the switch.
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Citations
7 Claims
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1. A zero voltage switching device comprising:
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a switch comprising a first terminal, a second terminal, and a control terminal; a first comparator comprising a first-comparator output terminal and a first-comparator first input terminal electrically connected to the first terminal of the switch; a second comparator comprising a second-comparator output terminal, a second-comparator first input terminal electrically connected to a first reference voltage, and a second-comparator second input terminal electrically connected to the control terminal of the switch; and control circuitry coupled with the first-comparator output terminal and the second-comparator output terminal, the control circuitry comprising; a phase detection circuit coupled with the first-comparator output terminal and the second-comparator output terminal; an integrator circuit coupled with the phase detection circuit; a third comparator comprising a third-comparator output terminal, a third-comparator first input terminal electrically connected to the first terminal of the switch, and a third-comparator second input terminal coupled with the integrator circuit; a flip-flop comprising a reset terminal, a clock terminal electrically connected to the third-comparator output terminal, and an output terminal electrically connected to the control terminal of the switch; and a controller coupled with the reset terminal of the flip-flop and configured to provide a reset signal to the flip-flop, and wherein the control circuitry is configured to; determine a phase difference between a first-comparator output signal and a second-comparator output signal, generate a second reference voltage based the phase difference, and cause a control signal to be applied to the control terminal of the switch upon detecting that a voltage signal at one of the first terminal or second terminal of the switch has crossed a voltage value equal to the second reference voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification