Trigence Semiconductor, Inc.

Kabushiki Kaisha Toshiba

Kawasaki Steel Corporation

Riso Kagaku Corporation

Seiko Precision Inc.

Showa Denko Materials Co., Ltd.

Nissan Motor Company Limited

Toyota Jidosha Kabushiki Kaisha

Hitachi Chemical Company, Ltd.

Trigence Semiconductors, Inc.

Akira Yasuda

Jun-ichi Okamura

Junichi Okamura

Tatsuya Nishida

Akihiro Ito

Yoshie Ohsaki

Tetsuro Itakura

Takafumi Yamaji

Takanori Hasegawa

Chiaki Kato

Nobuyuki Morito

Hajime Kimura

Hiroshi Iwamura

Koji Yamato

Yasuji Uesugi

Shigeru Yanagisawa

Kouichi Yasuda

Junsuke Takasaki

Hiroshi Yoshida

Hiroshi Tanimoto

Hiroshi Tsurumi

Takeshi Nishiyama

Takashi Ueno

Toshio Irie

Makoto Ishikawa

Seiji Nakajima

Koichi Yasuda

Ryuichi Fujimoto

Takaaki Hira

Hisatada Nakakoji

Mitsuru Suzuki

Takahito Tojima

Kenji Hara

Takeshi Kinoshita

Toshihiro Hirai

Yoshihisa Serizawa

Tomohisa Kimura

Masato Tanaka

Makoto Isobe

Koichi Nushiro

Motoyuki Konishi

Kenji Itoh

Masaharu Ogata

Takanobu Shimada

Toshitake Hanazawa

Satoshi Nakatsuka

Hideaki Takayama

Hiroshi Horiguchi

Hajime Kumura

Hideo Koumura

Hiroaki Ueno

Shuichi Kawaguchi

Tadaaki Morishita

Kazuyoshi Sato

Mikishige Sugasa

Itsuo Tanaka

Takahiro Kikuchi

Hirotake Sato

Kozou Tsunoyama

Junko Ikehira

A negative electrode active material for a lithium ion secondary battery includes silicon oxide particles, each of which has carbon on at least a portion of its surface, in which: a ratio (P/P) of an intensity of an X-ray diffraction peak at 2&#x3b8; of from 27&#xb0; to 29&#xb0;, which is derived from Si, to an intensity of an X-ray diffraction peak at 2&#x3b8; of from 20&#xb0; to 25&#xb0;, which is derived from SiO, is within a range of from 1.0 to 2.6, when CuK&#x3b1; radiation having a wavelength of 0.15406 nm is used as a radiation source; and a ratio (S/S) of a specific surface area calculated from moisture adsorption at 298 K to a specific surface area calculated from nitrogen adsorption at 77 K is 0.60 or less.

Negative electrode active material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery

A negative electrode active material for a lithium ion secondary battery includes silicon oxide particles, each of which has carbon on at least a portion of its surface, in which: a ratio (P/P) of an intensity of an X-ray diffraction peak at 2&#x3b8; of from 27&#xb0; to 29&#xb0;, which is derived from Si, to an intensity of an X-ray diffraction peak at 2&#x3b8; of from 20&#xb0; to 25&#xb0;, which is derived from SiO, is within a range of from 1.0 to 2.6, when CuK&#x3b1; radiation having a wavelength of 0.15406 nm is used as a radiation source; and a specific surface area calculated from carbon dioxide adsorption at 273 K is 8.5 m/g or less.

A speaker driving device includes a first calculation unit, a first driving signal generation unit and a third calculation unit. The first calculation unit outputs a first calculation signal obtained from a first input signal based on response characteristics according to a first parameter defining an equivalent circuit of a first speaker unit. The first driving signal generation unit generates a first driving signal based on a second driving signal and the first calculation signal. The first driving signal drives a first output speaker unit. The third calculation unit generates a third calculation signal from a second input signal based on response characteristics according to a third parameter defining an equivalent circuit of a third speaker unit. The second driving signal generation unit generates the second driving signal based on the first driving signal and the third calculation signal. The second driving signal drive a second output speaker unit.

Speaker driving device

A negative electrode active material for a lithium ion secondary battery, the negative electrode active material includes silicon oxide particles, each of which has carbon on at least a portion of its surface, in which: a ratio (P/P) of an intensity of an X-ray diffraction peak at 2&#x3b8; of from 27&#xb0; to 29&#xb0;, which is derived from Si, to an intensity of an X-ray diffraction peak at 2&#x3b8; of from 20&#xb0; to 25&#xb0;, which is derived from SiO, is within a range of from 1.0 to 2.6, when CuK&#x3b1; radiation having a wavelength of 0.15406 nm is used as a radiation source; and a specific surface area calculated from moisture adsorption at 298 K is 6.5 m/g or less.

A speaker driving device including a setting part setting at least one parameter defining an equivalent circuit of a first speaker unit as a first parameter; a first calculator configured to change a first frequency response based on the first parameter, the changed first frequency response being applied to an input signal; and a driving signal generator configured to generate a drive signal for driving a speaker unit based on a first calculation signal, the first calculation signal being obtained by applying the changed first frequency response to the input signal.

An object is to provide a lithium ion battery excellent in input/output characteristics, cycle life characteristics, and safety. The lithium ion battery is a lithium ion battery including, in a battery container, an electrolyte solution and an electrode group in which a positive electrode and a negative electrode are disposed through a separator. A lithium-nickel-manganese-cobalt composite oxide having a layered crystal structure is contained as a positive electrode active material, an easily graphitizable carbon is contained as a negative electrode active material, a weight of the easily graphitizable carbon heated at 550&#xb0; C. in dry air flow in thermogravimetric analysis is equal to more than 75% of a weight of the easily graphitizable carbon heated at 25&#xb0; C. therein, and a weight of the easily graphitizable carbon heated at 650&#xb0; C. therein is equal to or less than 20% of the weight of the easily graphitizable carbon heated at 25&#xb0; C. therein.

Lithium ion battery, negative electrode for lithium ion battery, battery module automobile, and power storage device

A speaker control device in one embodiment includes an oscillator connected in parallel with a drive circuit for driving a speaker, the oscillator changing an oscillation frequency according to a voltage, and a control circuit detecting a variation in the oscillation frequency of the oscillator, and adjusting an amount of current supplied to the speaker by the drive circuit in the case where a variation in the voltage exceeds an allowable value.

Speaker control device and speaker control method

Provided is a digital acoustic system comprising: a &#x394;&#x3a3; modulator that modulates a digital input signal and outputs a digital signal; a post-filter that is connected to the &#x394;&#x3a3; modulator and which performs mismatch shaping to convert the digital signal; a parallel-serial converter that converts the digital signal converted by the post-filter into a digital signal which is serially transmitted; a serial-parallel converter that restores the digital signal converted by the parallel-serial converter; and a drive circuit which receives the digital signal restored by the serial-parallel converter, and drives drive elements to convert the signal into an analog audio signal.

Digital acoustic system

Provided is a selection device including an acquisition section for acquiring digital selection signals, and an output section for outputting selection signals to respective unit cells, each unit cell capable of being commanded to output the value zero. The selection device is characterized in that: each selection signal is for commanding the unit cell to output a value corresponding to that selection signal; the sum of the values to be output as commanded by the respective selection signals, which are output to the respective unit cells, is a value determined in association with the digital selection signal; and if the output corresponding to the digital selection signal is the value zero, then selection signals each commanding to output a non-zero value (N) are output to some of the unit cells.

Selection device

A digital sound system suitable for a digital speaker device to directly convert analog sound by a circuit using a &#x394;&#x3a3; modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. A digital speaker driving device includes a &#x394;&#x3a3; modulator, a post filter, s driving circuits, and a power supply circuit to supply power to the &#x394;&#x3a3; modulator, the post filter and the s driving elements, and the s driving circuits are adapted to s digital signal terminals.

Digital speaker driving apparatus

A digital/analog conversion apparatus to convert a digital signal into an analog signal. The digital/analog conversion apparatus can generate a high-quality analog signal, even when elements configuring the digital/analog conversion apparatus have variance, with high resolution and a small circuit size. The data conversion apparatus is provided with a first data converter to reduce the number of bits of an input signal, a second data converter to convert the format of the first output signal, and a third data converter for conversion into a code which corresponds to the history of the output from the second data converter.

Digital/analog conversion apparatus

As one embodiment a drive circuit is disclosed. When a three-value signal including a value representing zero is input, the drive circuit outputs two two-value signals that drive two drive elements such that the difference between values representing the two two-value signals corresponds to a value representing the input three-value signal. When the value of the input three-value signal represents zero, output signals are determined in accordance with the input history of the three-value signal. The drive circuit may also be provided with a memory that records a flag value that is reversed in accordance with the input history of the input three-value signal, and the combination of the output two two-value signals being determined in accordance with the flag.

Drive circuit

A speaker control device in one embodiment includes a time to digital converter connected to a drive power source in series with a drive circuit for driving a plurality of coils of a speaker, the converter outputting a digital data in accordance with a voltage of the drive power source, and a monitor circuit detecting a state of the plurality of coils of the speaker based on digital data output by the time to digital converter.

Speaker control device

An acoustic playback system including a digital filter; and a plurality of digital modulators each of which output a digital signal to one of a plurality of speakers driven by digital signals having different play back bandwidths; wherein the digital filter converts a digital audio signal which is input into a plurality of digital audio signals of a plurality of frequency bandwidths corresponding to play back bandwidths of the speakers, and outputs each of the digital audio signals of the plurality of frequency bandwidths to one of the plurality of digital modulators; each of the digital modulators outputs the modulated digital signal to the speaker of a play back bandwidth corresponding to a frequency bandwidth of the digital audio signal which is input by performing miss-match shaping after noise shaping to a digital audio signal; and each number of bits of a digital signal of the digital modulators is different.

Acoustic playback system

Provided is a data converter which is provided with a clock signal input part which inputs a clock signal, and an input part which inputs an input signal, a sampling part which, in response to the clock signal input to the clock signal input part, performs sampling of the input signal input to the input part, and a signal processing part which performs signal processing according to the sampling cycle and outputs an output signal, wherein when the cycle of the clock signal input to the clock signal input part becomes longer, the output signals output by the signal processing part are reduced.

Converter

Growing community of inventors

Tokyo, Japan

Akira Yasuda