Patents by Inventor KENICHI WAKASUGI
KENICHI WAKASUGI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Battery capacity estimation device, battery capacity estimation method, and computer program product
Patent number: 11486931Abstract: A battery capacity estimation device in an embodiment includes one or more hardware processors configured to: acquire an alternating current power or an alternating current energy that is input to and output from a storage battery system via a direct current-alternating current converter, the storage battery system being capable of controlling charge and discharge; acquire a state of charge (SoC) of the storage battery system; and estimate a battery capacity of the storage battery system based on the acquired alternating current power or the acquired alternating current energy and the acquired SoC.Type: GrantFiled: July 23, 2020Date of Patent: November 1, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Masako Kiuchi, Mami Mizutani, Kenji Mitsumoto, Noriyuki Yamagishi, Toshiyuki Seto, Kenichi Wakasugi -
Patent number: 11451146Abstract: A DC-DC converter according to an embodiment is a DC-DC converter for generating an output voltage VOUT according to a reference voltage VREF, and includes a fully differential amplifier that outputs a first differential output signal and a second differential output signal according to a differential input using the reference voltage VREF and the output voltage VOUT, a pulse width modulation signal generation circuit that generates a pulse width modulation signal based on the first differential output signal Vout1 and the second differential output signal Vout2, and a driver that outputs a driving signal obtained by waveform-shaping the pulse width modulation signal.Type: GrantFiled: February 26, 2020Date of Patent: September 20, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Kenichi Wakasugi
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Publication number: 20210067038Abstract: A DC-DC converter according to an embodiment is a DC-DC converter for generating an output voltage VOUT according to a reference voltage VREF, and includes a fully differential amplifier that outputs a first differential output signal and a second differential output signal according to a differential input using the reference voltage VREF and the output voltage VOUT, a pulse width modulation signal generation circuit that generates a pulse width modulation signal based on the first differential output signal Vout1 and the second differential output signal Vout2, and a driver that outputs a driving signal obtained by waveform-shaping the pulse width modulation signal.Type: ApplicationFiled: February 26, 2020Publication date: March 4, 2021Inventor: Kenichi Wakasugi
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BATTERY CAPACITY ESTIMATION DEVICE, BATTERY CAPACITY ESTIMATION METHOD, AND COMPUTER PROGRAM PRODUCT
Publication number: 20210055351Abstract: A battery capacity estimation device in an embodiment includes one or more hardware processors configured to: acquire an alternating current power or an alternating current energy that is input to and output from a storage battery system via a direct current-alternating current converter, the storage battery system being capable of controlling charge and discharge; acquire a state of charge (SoC) of the storage battery system; and estimate a battery capacity of the storage battery system based on the acquired alternating current power or the acquired alternating current energy and the acquired SoC.Type: ApplicationFiled: July 23, 2020Publication date: February 25, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Masako KIUCHI, Mami MIZUTANI, Kenji MITSUMOTO, Noriyuki YAMAGISHI, Toshiyuki SETO, Kenichi WAKASUGI -
Patent number: 10097175Abstract: According to an embodiment, a semiconductor device includes: a first modulation circuit configured to generate a reference signal based on a first clock signal; a second modulation circuit configured to generate a feedback signal with a phase negative relative to a phase of the reference signal based on a second clock signal with a phase negative relative to a phase of the first clock signal; a comparator configured to compare the reference signal with the feedback signal to determine duty and generate a comparator signal; and a driver configured to output a drive signal.Type: GrantFiled: September 11, 2017Date of Patent: October 9, 2018Assignee: Kabushiki Kaisha ToshibaInventor: Kenichi Wakasugi
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Patent number: 10069418Abstract: A semiconductor device includes a modulator, a comparator, a pulse width setting circuit, and a driver. The modulator modulates a reference voltage to generate a reference signal. The comparator generates a comparator signal based on a result of comparing the reference signal and a feedback of an output signal supplied to an output terminal. The pulse width setting circuit generates a pulse modulation signal based on the comparator signal, wherein pulses of the pulse modulation signal have a pulse width that is equal to or greater than a predetermined pulse width. The driver outputs a driving signal that is based on the pulse modulation signal to the output terminal through an inductor.Type: GrantFiled: February 22, 2017Date of Patent: September 4, 2018Assignee: Kabushiki Kaisha ToshibaInventor: Kenichi Wakasugi
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Publication number: 20180183430Abstract: According to an embodiment, a semiconductor device includes: a first modulation circuit configured to generate a reference signal based on a first clock signal; a second modulation circuit configured to generate a feedback signal with a phase negative relative to a phase of the reference signal based on a second clock signal with a phase negative relative to a phase of the first clock signal; a comparator configured to compare the reference signal with the feedback signal to determine duty and generate a comparator signal; and a driver configured to output a drive signal.Type: ApplicationFiled: September 11, 2017Publication date: June 28, 2018Inventor: Kenichi Wakasugi
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Publication number: 20180091050Abstract: A semiconductor device includes a modulator, a comparator, a pulse width setting circuit, and a driver. The modulator modulates a reference voltage to generate a reference signal. The comparator generates a comparator signal based on a result of comparing the reference signal and a feedback of an output signal supplied to an output terminal. The pulse width setting circuit generates a pulse modulation signal based on the comparator signal, wherein pulses of the pulse modulation signal have a pulse width that is equal to or greater than a predetermined pulse width. The driver outputs a driving signal that is based on the pulse modulation signal to the output terminal through an inductor.Type: ApplicationFiled: February 22, 2017Publication date: March 29, 2018Inventor: Kenichi WAKASUGI
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Information processing apparatus, secure module, information processing method, and computer product
Patent number: 8984272Abstract: An information processing apparatus securely stores a program group comprising one or more programs and includes a first detector that detects an execution waiting state of a given program among the program group; a secure module that is configured such that information stored therein cannot be referred to by an external device, and when the execution waiting state is detected by the first detector, that encrypts the given program and writes the encrypted given program to a storage area that is different from that of the program group; a second detector that detects an execution request concerning the given program; a decrypter that decrypts the given program encrypted by the secure module and writes the decrypted given program to the storage area, when the execution request concerning the given program is detected by the second detector; and a program executor that executes the given program decrypted by the decrypter.Type: GrantFiled: March 29, 2012Date of Patent: March 17, 2015Assignees: Fujitsu Limited, Fujitsu Semiconductor LimitedInventors: Kiyoshi Kohiyama, Masakazu Takakusu, Kenichi Wakasugi -
Publication number: 20130187624Abstract: According to one embodiment, a semiconductor integrated circuit device for a DC-DC converter is configured to convert an input voltage to an output voltage by controlling a voltage supplied to a load according to a Pulse Width Modulation (PWM) signal, and to output the output voltage from an output terminal. The device includes an error voltage generator, a phase compensating module, a controller, and an error voltage adjuster. The error voltage generator is configured to generate an error voltage indicative of a difference between a feedback voltage corresponding to the output voltage and a predetermined reference voltage. The controller is configured to generate the PWM signal whose duty ratio depends on the error voltage and on a current flowing through the load connected to the output terminal. The error voltage adjuster is configured to adjust the error voltage based on a gradient of the feedback voltage.Type: ApplicationFiled: July 16, 2012Publication date: July 25, 2013Applicant: Kabushiki Kaisha ToshibaInventor: Kenichi WAKASUGI
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Publication number: 20120278608Abstract: An information processing apparatus securely stores a program group comprising one or more programs and includes a first detector that detects an execution waiting state of a given program among the program group; a secure module that is configured such that information stored therein cannot be referred to by an external device, and when the execution waiting state is detected by the first detector, that encrypts the given program and writes the encrypted given program to a storage area that is different from that of the program group; a second detector that detects an execution request concerning the given program; a decrypter that decrypts the given program encrypted by the secure module and writes the decrypted given program to the storage area, when the execution request concerning the given program is detected by the second detector; and a program executor that executes the given program decrypted by the decrypter.Type: ApplicationFiled: March 29, 2012Publication date: November 1, 2012Applicants: FUJITSU SEMICONDUCTOR LIMITED, FUJITSU LIMITEDInventors: KIYOSHI KOHIYAMA, MASAKAZU TAKAKUSU, KENICHI WAKASUGI