Abstract: An electronic apparatus includes a switch control section configured to: determine whether a received signal is any one of a power signal and a data signal based on the received signal, and select any one of a power-reception operation and a data-transmission operation based on the determination of the received signal.

Abstract: An electromagnetically-coupled state detection circuit including a detection unit that measures a primary side Q value of a circuit containing a primary side coil electromagnetically coupled with a secondary side coil and power transmission efficiency to the secondary side coil, corrects the power transmission efficiency based on the Q value of the primary side coil, and detects a state of electromagnetic coupling with the secondary side coil based on an obtained corrected value of the power transmission efficiency.

Abstract: A method for wireless power transmission includes obtaining, via a Q-value circuit, first and second voltages at respective first and second nodes of a resonance circuit. The first and second voltages are effective to determine if foreign matter is present in a space affecting wireless power transmission. The method includes controlling a switching section between the Q-value circuit and the resonance circuit such that at least a part of the electric power transmission process occurs at a different time than when the first and second voltages are obtained.

Abstract: A method for wireless power transmission includes obtaining, via a Q-value circuit, first and second voltages at respective first and second nodes of a resonance circuit. The first and second voltages are effective to determine if foreign matter is present in a space affecting wireless power transmission. The method includes controlling a switching section between the Q-value circuit and the resonance circuit such that at least a part of the electric power transmission process occurs at a different time than when the first and second voltages are obtained.

Abstract: A detection device includes a coil configured to be electromagnetically coupled with an outside, and a detection section connected to a circuit including the coil. The detection section is configured to measure a Q value of the circuit using an alternating-current signal at a frequency different from a frequency of an alternating-current signal of contactless power feed.

Abstract: A power receiving unit includes a communication unit, a control unit, a detecting unit that performs metallic foreign matter detection, and a charge storage unit. The control unit is configured to control charging so electric power is stored in the charge storage unit for consumption by the detecting unit during Q-value measurement when the control unit receives a Q-value measurement command from the power transmitting device through the communication unit.

Abstract: An energy receiver including a power receiver coil configured to wirelessly receive power transmitted from a power transmitter; a detection section configured to detect a foreign object; and a power storage section configured to supply power to the detection section during detection of the foreign object.

Abstract: This disclosure relates to a signal processing device, a signal processing method, and a receiving device that are capable of detecting response information at a high degree of accuracy from a carrier signal that is load-modulated based on the response information. A positive DC generating unit 61 generates a positive threshold based on a load-modulated carrier signal. A positive selecting unit 62 compares the voltage of the carrier signal with the positive threshold, and outputs the value of the larger one to an adding unit 65. A negative DC generating unit 63 generates a negative threshold based on the load-modulated carrier signal. A negative selecting unit 64 compares the voltage of the carrier signal with the negative threshold, and outputs the value of the smaller one to the adding unit 65. The adding unit 65 adds the output of the positive selecting unit 62 and the output of the negative selecting unit 64, and outputs the addition result to an IQ detecting unit 53.

Abstract: An energy receiver includes: a power receiver coil configured to wirelessly receive power transmitted from a power transmitter; a detection section configured to detect a foreign object; and a power storage section configured to supply power to the detection section during detection of the foreign object.

Abstract: The present technology relates to a driving circuit and a driving method, in which power loss at the time of switching an FET (Field Effect Transistor) can be reduced with a simple circuit configuration. A coil constitutes a resonance circuit together with an input capacitance at a gate of the FET. A switch (regeneration switch) turns on or off current flowing in the coil. A DC power source is a power source to replenish the resonance circuit with electric charge and is connected to the gate of the FET. A switch (replenish switch) turns on or off connection between the DC power source and the gate of the FET. The present technology is applicable to, for example, a power source that outputs AC voltage and current by switching operation.

Abstract: An electronic unit includes: a power receiving section configured to receive electric power fed from a feed unit by using a magnetic field; and a control section configured to perform, when a receiving current supplied from the power receiving section is less than a predetermined threshold current at a time of a light load, current increasing control to increase the receiving current to the threshold current or more.

Abstract: A method for wireless power transmission includes obtaining, via a Q-value circuit, first and second voltages at respective first and second nodes of a resonance circuit. The first and second voltages are effective to determine if foreign matter is present in a space affecting wireless power transmission. The method includes controlling a switching section between the Q-value circuit and the resonance circuit such that at least a part of the electric power transmission process occurs at a different time than when the first and second voltages are obtained.

Abstract: An electronic unit includes: a power receiving section configured to receive electric power fed from a feed unit by using a magnetic field; and a control section configured to perform, when a receiving current supplied from the power receiving section is less than a predetermined threshold current at a time of a light load, current increasing control to increase the receiving current to the threshold current or more.

Abstract: The present technology relates to a driving circuit and a driving method, in which power loss at the time of switching an FET (Field Effect Transistor) can be reduced with a simple circuit configuration. A coil constitutes a resonance circuit together with an input capacitance at a gate of the FET. A switch (regeneration switch) turns on or off current flowing in the coil. A DC power source is a power source to replenish the resonance circuit with electric charge and is connected to the gate of the FET. A switch (replenish switch) turns on or off connection between the DC power source and the gate of the FET. The present technology is applicable to, for example, a power source that outputs AC voltage and current by switching operation.

Abstract: Disclosed herein is a detecting device including a coil electromagnetically coupled to the external, a resonant circuit that includes at least the coil, and a detecting section that superimposes a measurement signal for measuring the Q-factor of the resonant circuit on a power transmission signal transmitted to the coil in a contactless manner and removes the power transmission signal from an alternating-current signal obtained by superimposing the measurement signal on the power transmission signal. The detecting section measures the Q-factor by using the alternating-current signal from which the power transmission signal is removed.

Abstract: A method for wireless power transmission includes obtaining, via a Q-value circuit, first and second voltages at respective first and second nodes of a resonance circuit. The first and second voltages are effective to determine if foreign matter is present in a space affecting wireless power transmission. The method includes controlling a switching section between the Q-value circuit and the resonance circuit such that at least a part of the electric power transmission process occurs at a different time than when the first and second voltages are obtained.

Abstract: Disclosed herein is a detecting device including a coil electromagnetically coupled to the external, a resonant circuit that includes at least the coil, and a detecting section that superimposes a measurement signal for measuring the Q-factor of the resonant circuit on a power transmission signal transmitted to the coil in a contactless manner and removes the power transmission signal from an alternating-current signal obtained by superimposing the measurement signal on the power transmission signal. The detecting section measures the Q-factor by using the alternating-current signal from which the power transmission signal is removed.

Abstract: The present technology relates to a driving circuit and a driving method, in which power loss at the time of switching an FET (Field Effect Transistor) can be reduced with a simple circuit configuration. A coil constitutes a resonance circuit together with an input capacitance at a gate of the FET. A switch (regeneration switch) turns on or off current flowing in the coil. A DC power source is a power source to replenish the resonance circuit with electric charge and is connected to the gate of the FET. A switch (replenish switch) turns on or off connection between the DC power source and the gate of the FET. The present technology is applicable to, for example, a power source that outputs AC voltage and current by switching operation.

Abstract: Disclosed herein is a detecting device including a coil electromagnetically coupled to the external, a resonant circuit that includes at least the coil, and a detecting section that superimposes a measurement signal for measuring the Q-factor of the resonant circuit on a power transmission signal transmitted to the coil in a contactless manner and removes the power transmission signal from an alternating-current signal obtained by superimposing the measurement signal on the power transmission signal. The detecting section measures the Q-factor by using the alternating-current signal from which the power transmission signal is removed.

Abstract: Provided is a non-contact electric power feeding system including an electric power feeding device, and an electric power receiving device configured to receive electric power fed from the electric power feeding device. The electric power feeding device includes a primary-side coil, a driver, a primary-side control unit, and a primary-side communication unit. The electric power receiving device includes a secondary-side coil, a rectifier unit, a regulator, a secondary-side communication unit, and a secondary-side control unit.