Kabushiki Kaisha Toshiba

Canon Medical Systems Corporation

Semiconductor Technology Academic Research Center

Kabuhsiki Kaisha Toshiba

Tetsuro Itakura

Masanori Furuta

Takeshi Ueno

Takafumi Yamaji

Hideyuki Funaki

Go Kawata

Shunsuke Kimura

Junya Matsuno

Daisuke Kurose

Taichi Ogawa

Osamu Watanabe

Akihide Sai

Hiroshi Tanimoto

Takayuki Miyazaki

Takashi Ueno

Takeshi Shima

Yohei Hatakeyama

Shoji Otaka

Kei Shiraishi

Rui Ito

Kentaro Yoshioka

Tomohiko Ito

Hirokatsu Shirahama

Toshiyuki Umeda

Yoshinao Tatebayashi

Ryuichi Fujimoto

Hironori Minamizaki

Satoshi Kondo

Nobuo Shibuya

Shigehito Saigusa

Tadashi Arai

Hiroshi Yoshida

Tetsuya Saito

Hidenori Okuni

Ryunosuke Gando

Zdzislaw Czarnul

Yosuke Toyama

Norio Takami

Haruhiko Okumura

Akira Yasuda

Hiroshi Tsurumi

Toshiya Mitomo

Tuan Thanh Ta

Daiki Ono

Takashi Taguchi

Shusuke Kawai

Hiroki Sakurai

Nobuo Kanou

Krystyna Czarnul, Legal Representative

Krystyma Czarnul

Hideto Furuyama

Toshihisa Nabetani

Tamio Ikehashi

Satoshi Takayama

Koichiro Mashiko

Mikio Koyama

Masahiro Hosoya

Kei Masunishi

Hitoshi Nagato

Takafumi Sakamoto

Chiaki Tanuma

Shuzo Hirahara

Yasushi Tomizawa

Hideki Nukada

Isao Amemiya

Hiroshi Uemura

Shiroh Saitoh

Yoichi Tokai

Shoji Ootaka

Tutomu Saito

Mamoru Izumi

Shunsuke Hattori

Hisako Tanaka

Etsuji Ogawa

Akiko Yamada

Chikashi Nakagawara

Tong Wang

Kumi Okuwada

Masami Sugiuchi

Yosuke Sakai

Tomohisa Kimura

Ikuya Aoyama

Hiroaki Hoshino

Yoshitaka Kasagi

Fumihiko Murakami

Shigetaka Takagi

Shigeru Yamada

Mai Nozawa

Hiroshi Horiguchi

Noriko Y Kudo

Ippei Akita

Shuhei Miwa

Atsuko Nakamura

Seizaburou Shimizu

A phase locked loop has an oscillator that varies a frequency according to a control signal, a resonance element that resonates at a predetermined resonance frequency and output a signal obtained by shifting a phase of an output signal of the oscillator by 90 degrees at the resonance frequency, a phase detector that detects a phase error between an output signal of the resonance element and an output signal of the oscillator, a feedback controller that controls a frequency of an output signal of the oscillator by proportional control and integral control according to the phase error, and a control signal corrector that corrects the control signal by adding a correction term corresponding to environment information to an output signal of the feedback controller.

Phase locked loop and sensing device

A resonance frequency detector has an adder that adds a correction term to an oscillation frequency of an output signal of an oscillator, and detects a predetermined resonance frequency of a resonance element. The correction term is generated based on a phase error in a phase locked loop and a degree of change in phase at the resonance frequency, and the phase locked loop generates a control signal based on the phase error between an output signal of the resonance element that resonates at the resonance frequency and the output signal of the oscillator that varies the oscillation frequency according to the control signal.

Resonance frequency detector and sensing device

A protection circuit comprises a first transistor, a comparator, a second transistor, and a third transistor. The first transistor has a gate connected to an input terminal and configured to pass a drain current based on a potential at the input terminal. The comparator has a non-inverting terminal to which a source of the first transistor is connected and an inverting terminal to which a reference voltage is applied. The second transistor has a gate to which an output of the comparator is applied, a source connected to a power supply voltage, and a drain connected to the input terminal. The third transistor has a gate to which a predetermined voltage is applied, a drain connected to the gate of the second transistor, and a source connected to the drain of the input transistor.

Protection circuit

According to one embodiment, a method for controlling a vibration device includes a movable body capable of vibrating in a first direction, and a catch and release mechanism capable of catching the movable body that freely vibrates in the first direction, by an electrostatic attractive force, and releasing the caught movable body to freely vibrate the movable body in the first direction, wherein in a condition that tc is a time from a rise start time point to a rise end time point of an applied voltage for catching the movable body that freely vibrates in the first direction, by the electrostatic attractive force, and td is a period of the free vibration in the first direction of the movable body, the time tc is longer than the time td.

Vibration device and method for controlling the same

According to one embodiment, a detector is disclosed. The detector has a mechanism with first and second vibrators which vibrate in first and second directions. Circuits detect output first and second signals conforming to the detected positions of the vibrators. A detection circuit detects second signal using the first signal as a reference of synchronous detection and outputs a detection signal. A filter continues a moving average process on the detection signal for a period set based on the first signal. A controller circuitry controls the mechanism to causes the first vibrator to start vibrating in the first direction in synchronization with a clock signal.

Detector with catch and release mechanism

A detection device detects a dynamic quantity exerted on a detection mechanical system including first and second mechanical oscillators. The detection device includes first to third transducers, a canceller, a low-pass filter, and an inverting amplification unit. The first transducer detects the first mechanical oscillator position in a first direction to output a first signal. The second transducer detects the second mechanical oscillator position in a second direction to output a second signal. The canceller inverts a direction in which a signal detected by the second transducer from the second mechanical oscillator varies according to the first signal. The third transducer detects the second mechanical oscillator position in the second direction to output a third signal. The inverting amplification unit gives a control signal generated by inverting the third signal to a second actuator moving the second mechanical oscillator.

Detection device for detecting dynamic quantity exerted on mechanical system including first and second mechanical oscillators

According to one embodiment, a vibration apparatus includes a coupled vibration mechanism which includes a plurality of mass parts and connects the mass parts, a catch and release mechanism which catches a vibrating mass parts to stop vibration and releases a caught mass parts to start vibration and a control circuitry configured to determine whether catching the mass parts by the catch and release mechanism is successful or failed and control the catch and release mechanism for raising possibility for catching the mass parts by the catch and release mechanism, if the catching the mass parts is determined as failed.

Vibration apparatus

According to one embodiment, a vibration device is disclosed. The device includes a mass unit including a mass unit, a catch and release mechanism to catch and release the mass unit and including an electrode unit, and a control unit to control catching and releasing of the mass unit by a voltage to be applied between the mass unit and the electrode unit. The control unit controls the voltage such that a voltage greater than a steady voltage is to be applied between the mass and electrode units before the steady voltage is applied between the mass and electrode units. The voltage greater than the steady voltage is to be applied in at least part of a period during which the mass unit is vibrating after the mass unit is released from the catch and release mechanism.

Vibration device

According to one embodiment, a voltage-current conversion circuit includes an amplifier first, second and third inputs, a transistor including a first and second terminals, and a control terminal electrically connected to an output of the amplifier, and a serial connection including resistors connected in series between the first terminal and an ac ground, wherein a predetermined connecting point, among a first connecting point between the first terminal and the serial connection, a second connecting point between the ac ground and the serial connection, and one or more third connecting points between the resistors, is connected to the second input, and one of the connecting points other than the predetermined connecting point is connected to the third input.

Voltage-current conversion circuit

An analog-to-digital converter has a switched capacitor comprising a capacitor to perform charging and discharging by switching a switch, the switched capacitor varying a charge amount of the capacitor in accordance with a frequency of an oscillation signal in accordance with a differential signal between an input signal and a feedback signal, capacitance of the capacitor, and a predetermined bias voltage, a feedback signal generator to generate the feedback signal based on an output signal of the switched capacitor, and a digital converter to generate a digital signal by digital conversion of the input signal based on the oscillation signal.

Analog-to-digital converter and signal processing apparatus

Amplifier circuitry has sampling circuitry which samples an input voltage, a quantizer which quantizes an output voltage of the sampling circuitry and outputs an output code, a differential amplifier which amplifies a differential voltage between the output voltage of the sampling circuitry and a reference voltage and performs offset adjustment according to the output code of the quantizer, and a first capacitor which is connected between an output node of the differential amplifier and an output node of the sampling circuitry.

Amplifier circuitry, ad converter, and wireless communication device

According to an embodiment, a radiation measuring apparatus includes a detector, comparators, a threshold controller, counters, and a generator. The detector includes plural detecting elements each configured to convert energy of incident radiation into a first electrical signal. The comparators correspond to the respective detecting elements, each comparator being configured to output a second electrical signal when a level of the corresponding first electrical signal is not less than a threshold. The threshold controller is configured to supply a first value as the threshold to the respective comparators at a first time, and supply a second value as the threshold to the respective comparators at a second time. The counters correspond to the respective comparators, each counter being configured to count the corresponding second electrical signal. The generator is configured to generate a pulse height frequency distribution of the radiation by using counts of the counters.

Radiation measuring apparatus, computer program product, and radiation computed tomography apparatus

A time to digital converter has a counter to measure the number of cycles of a first signal, a first phase difference detector to generate a phase difference signal having a pulse width corresponding to a phase difference, a first capacitor to be charged with an electric charge, a second capacitor including capacitance N times the capacitance of the first capacitor, the N being a real number larger than 1, a comparator to compare a charge voltage of the first capacitor and a charge voltage of the second capacitor, a first charge controller to continue to charge the second capacitor until the comparator detects that the charge voltage of the second capacitor has reached the charge voltage of the first capacitor or more, and a first phase difference arithmetic unit to operate the phase difference between the first signal and the second signal.

Time to digital converter, phase difference pulse generator, radio communication device, and radio communication method

A DC-DC converter includes an input terminal, multiple output terminals, an inductor, a first switch, a first condenser, a second switch and a switch controller. One end of the inductor is connected to the input terminal. The first switch is subjected to on-off control to change a current flowing through the inductor. The first condenser has one end connected between the inductor and a first output terminal, which is one of the multiple output terminals, and has the other end connected to a ground. The second switch is connected between the inductor and the first condenser. The switch controller controls the second switch to turn on when the first switch is turned off while a first output voltage from the first output terminal is smaller than a predetermined first threshold value.

DC-DC converter

A receiver has a receiving unit to receive a radio signal, a signal detector to detect a reception signal in each of a plurality of set periods shifted in time to be overlapped in a partial period, and a demodulating unit to perform demodulation processing based on the reception signal. The signal detector has a smoothing unit to smooth the output signal of the receiving unit in each of the plurality of set periods, a comparing unit to output a signal obtained by comparing a level of the smoothed signal, with a threshold value, and an initializing unit to initialize the signal smoothed by the smoothing processing unit, every time the comparing unit compares the smoothed signal with the threshold value, and the demodulating unit performs the demodulation processing based on the smoothed signal determined to be the threshold value or more by the comparing unit.

Receiver and radio communication device

Growing community of inventors

Tokyo, Japan

Tetsuro Itakura