Sony Corporation

Sony Group Corporation

Sony Semiconductor Solutions Corporation

Imec Vzw

Keigo Bunsen

Hiroaki Nakano

Toru Terashima

Shinichi Fukuda

Osamu Kozakai

Tomomichi Murakami

Kenichi Fujimaki

Takaaki Hashiguchi

Yoshitaka Yoshino

Jan Craninckx

Shinji Komiyama

Ewout Martens

Yuji Murayama

Davide Dermit

There is provided an analog-to-digital converter circuit including: a first converter circuit generating a first digital code by performing analog-to-digital conversion on the basis of an input voltage; a second converter circuit generating a second digital code by performing, on the basis of the input voltage and the first digital code, analog-to-digital conversion over a voltage range wider than that of a least significant bit of the first converter circuit; an error detector detecting a conversion error of the analog-to-digital conversion on the basis of the first and second digital codes, thereby generating error data indicating a bit having a conversion error and the kind of the conversion error; and a calibration circuit estimating an error factor on the basis of the first and second digital codes and the error data, and performing calibration of a circuit relevant to the estimated error factor on the basis of an estimation result.

Analog-to-digital converter circuit

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.

Electronic unit that wirelessly receives power and increases current using a dummy load

A power feeding apparatus is provided. The power feeding apparatus includes a power feeding unit configured to supply electric power to a power receiving apparatus through a magnetic field; a measuring unit configured to measure an electric characteristic value and to generate a measurement value; a power receiving unit configured to provide a set value; and a foreign substance detection unit configured to detect a foreign substance in the magnetic field based on the set value and the measurement value. A power receiving apparatus, a power feeding system, and a method of controlling power feeding are also provided.

Power feeding apparatus, power receiving apparatus, power feeding system, and method of controlling power feeding

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.

Detecting device, power receiving device, contactless power transmission system, and detecting method

A power receiving device of the present disclosure includes a power generating unit and a control unit. The power generating unit generates direct-current power, on a basis of a power signal supplied from a power feeding device wirelessly. The control unit sets, on a basis of an output current of the power generating unit, an upper limit of the output current or an upper limit of output power of the power generating unit.

Power receiving device, control method thereof, and feed system

Electronic unit and feed system

An electronic unit includes: an electricity reception section configured to receive power fed from a power feeding unit using a magnetic field; a voltage detection section configured to detect a received voltage supplied from the electricity reception section; and a control section, wherein while preliminary power feeding at a lower power than main power feeding is performed from the power feeding unit, and when a received voltage detected by the voltage detection section is equal to or higher than a predetermined threshold voltage, the control section performs voltage reduction control so as to decrease the received voltage to lower than the threshold voltage.

Electronic unit and power feeding system

A power receiving unit of the disclosure includes: a power generation section configured to generate direct-current power, based on a power signal supplied wirelessly from a power feeding unit; and a communication section configured to set a load of the power signal in accordance with an output current of the power generation section, and to communicate with the power feeding unit by modulating the load.

Power receiving unit, power feeding control method, and feed system

A device configured to receive power (B), the device comprising a coil (L) having a resistance, and at least one circuit () configured to calculate a target voltage value based on an amount of power received by the device and the resistance of the coil, and control received power voltage based on the calculated target voltage value.

Power receiver, non-contact power transmission system, and method of controlling received-power voltage

The present disclosure includes a feed unit and a feed system. The feed unit includes a power transmission coil and a coupling coefficient calculation section. The power transmission coil is configured to transmit power to a power reception coil of a receiving unit using a magnetic field. The coupling coefficient calculation section is configured to measure frequency characteristics of input impedance of a rectification circuit of the receiving unit, the rectification circuit being in a non-operating state. The coupling coefficient calculation section is also configured to calculate a coupling coefficient between the power transmission coil and the power reception coil using the frequency characteristics of the input impedance of the rectification circuit that have been measured.

Growing community of inventors

Kanagawa, Japan

Keigo Bunsen