Methods and apparatus for power loss calibration in a wireless power system
First Claim
1. An integrated circuit, comprising:
- a communication and control unit including;
a control unit for controlling an inverter, the inverter configured to convert an input voltage to an alternating current output signal for application to a transmission coil for reception by a receiver; and
a communication unit for demodulating transmissions from the receiver;
the control unit configured to cause the inverter to provide a first transmit power to the transmission coil and the communication unit configured to receive a first power received signal from the receiver in response to the first transmit power, the control unit further configured to cause the inverter to provide a second transmit power to the transmission coil and the communication unit configured to receive a second power received signal from the receiver in response to the second transmit power;
the communication and control unit using the first transmit power, the first power received signal, the second transmit power and the second power received signal to determine a first gain and a first offset, in which, when a third transmit power greater than the second transmit power is transmitted by the transmission coil and a third power received signal is received by the communication unit from the receiver in response to the third transmit power, the communication and control unit determines a second gain and a second offset using the first transmit power, the first power received signal, the third transmit power and the third power received signal.
1 Assignment
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Accused Products
Abstract
In an example, an integrated circuit includes a communication and control unit. The communication and control unit controls an inverter that applies an alternating current output signal to a transmission coil for reception by a receiver. The communication and control unit causes the inverter to provide a first and second transmit powers to the transmission coil, and the communication unit receives a first and second power received signals from the receiver in response to the first and second transmit powers. The communication and control unit determines a first gain and offset using the first transmit power, the first power. When a third transmit power greater than the second transmit power is transmitted by the transmission coil, the communication and control unit determines a second gain and a second offset using the first transmit power, the first power received signal, the third transmit power and a third power received signal.
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Citations
20 Claims
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1. An integrated circuit, comprising:
a communication and control unit including; a control unit for controlling an inverter, the inverter configured to convert an input voltage to an alternating current output signal for application to a transmission coil for reception by a receiver; and a communication unit for demodulating transmissions from the receiver; the control unit configured to cause the inverter to provide a first transmit power to the transmission coil and the communication unit configured to receive a first power received signal from the receiver in response to the first transmit power, the control unit further configured to cause the inverter to provide a second transmit power to the transmission coil and the communication unit configured to receive a second power received signal from the receiver in response to the second transmit power; the communication and control unit using the first transmit power, the first power received signal, the second transmit power and the second power received signal to determine a first gain and a first offset, in which, when a third transmit power greater than the second transmit power is transmitted by the transmission coil and a third power received signal is received by the communication unit from the receiver in response to the third transmit power, the communication and control unit determines a second gain and a second offset using the first transmit power, the first power received signal, the third transmit power and the third power received signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power transmitter comprising:
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a transmission coil; an inverter for converting an input voltage to an alternating current output signal for application to the transmission coil for reception by a receiver; and a communication and control unit for demodulating transmissions from the receiver and controlling the inverter, the communication and control unit causing the inverter to provide a first transmit power to the transmission coil and to receive a first power received signal from the receiver in response to the first transmit power, causing the inverter to provide a second transmit power to the transmission coil and receive a second power received signal from the receiver in response to the second transmit power, the communication and control unit using the first transmit power, the first power received signal, the second transmit power and the second power received signal to determine a first gain and a first offset, in which, when a third transmit power greater than the second transmit power is transmitted by the transmission coil and a third power received signal is received from the receiver in response to the third transmit power, the communication and control unit determines a second gain and a second offset using the first transmit power, the first power received signal, the third transmit power and the third power received signal. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for operating an integrated circuit comprising:
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causing an inverter to provide a first transmit power to a transmission coil; receiving a first power received signal from a receiver receiving power transmitted from the transmission coil in response to the first transmit power; causing the inverter to provide a second transmit power to the transmission coil; receiving a second power received signal from the receiver; determining a first gain and a first offset using the first transmit power, the first power received signal, the second transmit power and the second power received signal to determine received from the receiver; causing the inverter to provide a third transmit power to the transmission coil; receiving a third power received signal from the receiver; determining, if the third transmit power is greater than the second transmit power, a second gain and a second offset using the first transmit power, the first power received signal, the third transmit power and the third power received signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification