Systems and methods for power transfer based on resonance coupling of inductors
First Claim
1. An integrated circuit (IC), comprising:
- a first resonator circuit that receives a supply voltage at a first node and that includes;
a switching device connected between the first node and a first ground potential;
a first inductor that is connected between the first node and the first ground potential;
a second inductor that is connected between the first node and the first ground potential;
a first inductor capacitor (LC) tank; and
first and second resistors connected between the switching device and the LC tank;
a second resonator circuit that outputs power to a load and that includes;
a third inductor that is inductively coupled to the first inductor across an isolation barrier and that is connected to a second ground potential, wherein the second ground potential is different than the first ground potential;
a fourth inductor that is inductively coupled to the second inductor across the isolation barrier and that is connected to the second ground potential,wherein the load draws power from a second node between the third and fourth inductors; and
a second LC tank including a plurality of switches;
a voltage divider that is connected to the second node; and
a regulator circuit that generates a signal based on a comparison of an output voltage of the voltage divider with a reference voltage,wherein the plurality of switches of the second LC tank switch based on a state of the signal.
1 Assignment
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Accused Products
Abstract
An integrated circuit (IC) includes a first resonator circuit that includes: a first switching device that connects and disconnects a supply voltage to and from a first node; a first inductor that is connected between the first node and a first ground potential; and a second inductor that is connected between the first node and the first ground potential. The IC also includes a second resonator circuit that includes: a third inductor that is inductively coupled to the first inductor across an isolation barrier and that is connected between a second node and a second ground potential; a fourth inductor that is inductively coupled to the second inductor across the isolation barrier and that is connected between the second node and the second ground potential; and a second switching device that connects and disconnects the second node to and from a load. The second ground potential is different than the first ground potential.
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Citations
19 Claims
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1. An integrated circuit (IC), comprising:
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a first resonator circuit that receives a supply voltage at a first node and that includes; a switching device connected between the first node and a first ground potential; a first inductor that is connected between the first node and the first ground potential; a second inductor that is connected between the first node and the first ground potential; a first inductor capacitor (LC) tank; and first and second resistors connected between the switching device and the LC tank; a second resonator circuit that outputs power to a load and that includes; a third inductor that is inductively coupled to the first inductor across an isolation barrier and that is connected to a second ground potential, wherein the second ground potential is different than the first ground potential; a fourth inductor that is inductively coupled to the second inductor across the isolation barrier and that is connected to the second ground potential, wherein the load draws power from a second node between the third and fourth inductors; and a second LC tank including a plurality of switches; a voltage divider that is connected to the second node; and a regulator circuit that generates a signal based on a comparison of an output voltage of the voltage divider with a reference voltage, wherein the plurality of switches of the second LC tank switch based on a state of the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An integrated circuit (IC), comprising:
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a first resonator circuit that receives a supply voltage at a first node and that includes; a switching device connected directly to the first node and connected to a first ground potential; a first inductor that is connected between the first node and the first ground potential; a second inductor that is connected between the first node and the first ground potential; a first inductor capacitor (LC) tank; and first and second resistors connected between the switching device and the LC tank; a second resonator circuit that outputs power to a load and that includes; a third inductor that is inductively coupled to the first inductor across an isolation barrier and that is connected to a second ground potential, wherein the second ground potential is different than the first ground potential; and a fourth inductor that is inductively coupled to the second inductor across the isolation barrier and that is connected to the second ground potential, wherein the load draws power from a second node between the third and fourth inductors; and a second LC tank including a plurality of switches; a voltage divider that is connected to the second node; and a regulator circuit that generates a signal based on a comparison of an output voltage of the voltage divider with a reference voltage, wherein the plurality of switches of the second LC tank switch based on a state of the signal.
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19. An integrated circuit (IC), comprising:
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a first resonator circuit that receives a supply voltage at a first node and that includes; a switching device connected between the first node and a first ground potential; a first inductor that is connected between the first node and the first ground potential; a second inductor that is connected between the first node and the first ground potential; a first inductor capacitor (LC) tank comprising; first and second capacitors; and a plurality of switches that control a frequency of charging and discharging of the first LC tank; and a variable capacitor array connected in series with one of the first and second capacitors and in parallel with the plurality of switches; a second resonator circuit that outputs power to a load and that includes; a third inductor that is inductively coupled to the first inductor across an isolation barrier and that is connected to a second ground potential, wherein the second ground potential is different than the first ground potential; and a fourth inductor that is inductively coupled to the second inductor across the isolation barrier and that is connected to the second ground potential; a voltage divider that is connected to a second node between the third and fourth inductors; a regulator circuit that generates a first signal based on a comparison of an output voltage of the voltage divider with a reference voltage; a transmitter that transmits the first signal across the isolation barrier; a receiver that receives the first signal from the transmitter across the isolation barrier and that outputs a second signal based on the first signal; and a control module that, based on a clock signal and the second signal from the receiver, selectively adjusts a capacitance of the first resonator circuit.
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Specification