Sony Corporation

Sony Semiconductor Solutions Corporation

Uichiro Omae

Hiroaki Nakano

Hiroaki Fujita

Masayoshi Abe

Tetsuya Fujiwara

Shinichi Fukuda

Takashi Miyamoto

Tatsuo Shimizu

Shinji Komiyama

Tamotsu Kiyakawauchi

Takeshi Maeda

Osamu Kozakai

Eiji Nakashio

Takayuki Hirabayashi

Naohiro Adachi

Takanobu Iwama

Kazuo Anno

Shinya Tochikubo

Ken Matsui

Hiroya Yamamoto

Masayuki Tanaka

Provided are a distance measurement device and a distance measurement method for accurately measuring a distance even when multipath occurs. The present technology provides a distance measurement device including a first transceiver, a second transceiver, a response information acquisition section, a filter, and a distance calculator. The first transceiver transmits a first pulse signal to the second transceiver while performing frequency sweeping. The second transceiver receives the first pulse signal transmitted from the first transceiver. The response information acquisition section acquires response information on a basis of a phase difference obtained by reception of the first pulse signal. The filter extracts initial response information from the response information, the initial response information being the response information related to the first pulse signal to be received at an initial stage. The distance calculator calculates group delay on a basis of the initial response information, and calculates a distance between the first transceiver and the second transceiver by multiplying the group delay by a light velocity.

Distance measurement device and distance measurement method

The present disclosure relates to a communication apparatus, a communication method, and a program that enable improvement in performance of short-range wireless communication. The communication apparatus includes: a reception circuit that receives a signal transmitted by load-modulating in a card, which is a partner in short-range wireless communication, via an antenna; and a transmission power control unit that controls transmission power transmitted to the card on the basis of a reception signal modulation degree which is a modulation degree of the signal received by the reception circuit. Then, the transmission power control unit performs control so as to reduce the transmission power in a case where the reception signal modulation degree is less than or equal to a certain threshold value. The present technology can be applied to, for example, a communication apparatus that performs short-range wireless communication.

Communication apparatus, communication method, and program

A non-contact communication medium according to an embodiment of the present technology is a non-contact communication medium for a recording medium cartridge, including: a circuit component; a support substrate; and an antenna coil. The circuit component has a memory unit capable of storing management information relating to the recording medium cartridge therein. The support substrate supports the circuit component. The antenna coil includes a coil unit that is electrically connected to the circuit component and formed on the support substrate, an inductance value of the coil unit being 0.3 &#x3bc;H or more and 2.0 &#x3bc;H or less.

Non-contact communication medium and recording medium cartridge

The present technology relates an antenna apparatus and a communication apparatus that make it possible to miniaturize the antenna apparatus and improve communication performance. A solenoid-coil-type solenoid antenna and a metal plate disposed to have an overlapping portion with the solenoid antenna in a length direction of the solenoid antenna are included. The overlapping portion includes a portion corresponding to a length of 50% to 80% of a length of the solenoid antenna. Furthermore, a slit is formed in the metal plate, and the solenoid antenna is disposed in parallel to the slit. It is possible to apply the present technology to an antenna apparatus included in a communication apparatus that performs wireless communication.

Antenna apparatus and communication apparatus

A detection apparatus includes: a measurement coil disposed in a vicinity of a power reception coil configured to receive power supplied through a magnetic field; a measurement section configured to measure a voltage of the measurement coil as a measurement coil voltage; and a foreign object detection section configured to obtain an electrical characteristic value of at least one of the power reception coil and the measurement coil on the basis of the measurement coil voltage, and to detect a foreign object in the magnetic field if the electrical characteristic value is lower than a predetermined lower limit threshold value.

Detection apparatus, power supply system, and method of controlling detection apparatus

A communication device according to the disclosure includes: a signal generator that generates, on the basis of the first signal received from a communication partner through a coil, a second signal that synchronizes with the first signal; a first modulator configured to be able to modulate the first signal on the basis of the second signal; a second modulator configured to be able to modulate the first signal; and a communication controller that selects, on the basis of the first signal, whichever modulator is to be operated, from the first modulator and the second modulator.

Communication device and communication method

A communication device of the disclosure includes a phase synchronizer, a modulator, and a controller. The phase synchronizer generates a second signal on a basis of a first signal received from a communication partner by selectively performing one of a closed loop operation and an open loop operation. The modulator is able to modulate the first signal on a basis of the second signal. The controller controls operations of the phase synchronizer and the modulator.

Communication device, communication method, and communication system

A communication device of the disclosure includes a phase synchronizer, a first modulator, and a detector. The phase synchronizer generates a second signal on a basis of a first signal received from a communication partner. The first modulator is able to modulate the first signal on a basis of the second signal. The detector detects that synchronization between the first signal and the second signal is lost.

Communication device, communication method, and communication system with desynchronization detection

A power receiving unit of the disclosure includes a communicator that communicates with a feed unit, a power receiver that has a first rectifier circuit and a second rectifier circuit that each rectify an electric power signal supplied from the feed unit, and a controller that selects and operates one of the first rectifier circuit and the second rectifier circuit.

Power receiving unit, power receiving method, and feed system

A receiver of the disclosure includes: a load modulator that transmits an active load modulation signal generated by active load modulation to a reader writer, in response to a carrier signal transmitted from the reader writer; and a controller that determines whether the active load modulation signal has reached the reader writer, and controls the load modulator to retransmit the active load modulation signal, after changing a phase of the active load modulation signal with respect to the carrier signal, in a case where the controller determines that the active load modulation signal has not reached the reader writer.

Receiver and communication system

A detecting device includes: a measurement coil made up of a first partial coil to which current in a particular direction is induced by a magnetic field to be supplied to a power reception coil configured to receive power, a second partial coil to which the current in the particular direction is induced by the magnetic field, and a third partial coil, which is disposed between the first and second partial coils, to which current in the opposite direction of the particular direction is induced by the magnetic field; a measurement unit configured to measure the voltage of the measurement coil as measurement coil voltage; and a foreign object detecting unit configured to detect a foreign object within the magnetic field based on the measurement coil voltage.

Detecting device, power supply system, and detecting device control method

A detecting device includes: a measurement coil made up of a first partial coil to which current in a particular direction is induced by a magnetic field to be supplied to a power reception coil configured to receive power, and a second partial coil to which the current in the opposite direction of the particular direction is induced by the magnetic field; a measurement unit configured to measure the voltage of the measurement coil as measurement coil voltage; and a foreign object detecting unit configured to detect a foreign object within the magnetic field based on the measurement coil voltage.

Growing community of inventors

Kanagawa, Japan

Uichiro Omae