Reducing the impact of an inductive energy transfer system on a touch sensing device
First Claim
1. A receiver device for an inductive energy transfer system, the receiver device comprising:
- a touch sensing device;
a receiver coil;
a first capacitor connected in series between the receiver coil and one input terminal of an AC-to-DC converter;
a second capacitor connected in series between the receiver coil and another input terminal of the AC-to-DC converter, wherein the first and second capacitors are matched to reduce an amount of noise the touch sensing device receives when the receiver coil is receiving energy inductively.
1 Assignment
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Accused Products
Abstract
A transmitter device for an inductive energy transfer system can include a DC-to-AC converter operably connected to a transmitter coil, a first capacitor connected between the transmitter coil and one output terminal of the DC-to-AC converter, and a second capacitor connected between the transmitter coil and another output terminal of the DC-to-AC converter. One or more capacitive shields can be positioned between the transmitter coil and an interface surface of the transmitter device. A receiver device can include a touch sensing device, an AC-to-DC converter operably connected to a receiver coil, a first capacitor connected between the receiver coil and one output terminal of the AC-to-DC converter, and a second capacitor connected between the receiver coil and another output terminal of the AC-to-DC converter. One or more capacitive shields can be positioned between the receiver coil and an interface surface of the receiver device.
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Citations
20 Claims
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1. A receiver device for an inductive energy transfer system, the receiver device comprising:
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a touch sensing device; a receiver coil; a first capacitor connected in series between the receiver coil and one input terminal of an AC-to-DC converter; a second capacitor connected in series between the receiver coil and another input terminal of the AC-to-DC converter, wherein the first and second capacitors are matched to reduce an amount of noise the touch sensing device receives when the receiver coil is receiving energy inductively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A portable electronic device comprising:
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a capacitive sensor; and an inductive power receiver comprising; a receive coil comprising; a first output terminal; and a second output terminal; a load comprising; a first input terminal; and a second input terminal; a first resonant capacitor having a first capacitance and coupling the first output terminal of the receive coil to the first input terminal of the load; and a second resonant capacitor having the first capacitance and coupling the second output terminal of the receive coil to the second input terminal of the load. - View Dependent Claims (11, 12, 13, 14)
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15. An inductive power receiver comprising:
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a receive coil comprising; a first output terminal; and a second output terminal; a load comprising; a first input terminal; and a second input terminal; and a set of matched resonant capacitors coupling the first output terminal of the receive coil to the first input terminal of the load and the second output terminal of the receive coil to the second input terminal of the load;
whereinthe set of matched resonant capacitors reduces common mode noise in the inductive power receiver when the receive coil is receiving energy. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification