Patents by Inventor Shoji Otaka
Shoji Otaka 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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Patent number: 10992181Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: GrantFiled: February 15, 2017Date of Patent: April 27, 2021Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Shijo, Akiko Yamada, Kohei Onizuka, Fumi Moritsuka, Hiroaki Ishihara, Noriaki Oodachi, Shuichi Obayashi, Hiroki Kudo, Kenichirou Ogawa, Shoji Otaka, Hiroki Shoki
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Patent number: 9787716Abstract: A power-saving control apparatus includes a memory storing first to Nth different authentication codes, determines, every time a signal including an authentication code is received, whether the authentication code in the received signal is a valid code which matches one of the authentication codes in the memory, outputs an operation signal to a main apparatus when the authentication code in the received signal is determined to be the valid code, and generates a new authentication code, when (a) the number of times the authentication code in each received signal matches a first authentication code of the authentication codes in the memory is equal to a predetermined value or (b) the authentication code in the received signal matches a second or subsequent authentication code of the authentication codes in the memory, to delete one of the authentication codes in the memory, and to store the new authentication code in the memory.Type: GrantFiled: November 12, 2008Date of Patent: October 10, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Keisuke Mera, Yusuke Doi, Takafumi Sakamoto, Toshiyuki Umeda, Shoji Otaka
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Publication number: 20170170690Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: ApplicationFiled: February 15, 2017Publication date: June 15, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu SHIJO, Akiko YAMADA, Kohei ONIZUKA, Fumi MORITSUKA, Hiroaki ISHIHARA, Noriaki OODACHI, Shuichi OBAYASHI, Hiroki KUDO, Kenichirou OGAWA, Shoji OTAKA, Hiroki SHOKI
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Patent number: 9614487Abstract: A receiving apparatus includes a variable gain unit to change between a first gain and a smaller second gain, and to amplify a received signal to obtain an amplified signal; a comparator to compare a power of the amplified signal with a reference value; and a controller to set a gain to the first gain while in a standby state, to reset a gain to a third gain between the first and second gains if in a standby state the power of the received signal is larger than the reference value, and then to set a gain to the first gain and return to the standby state if the power is equal to or lower than the reference value, or if not, to a fourth gain between the first and third gains.Type: GrantFiled: March 9, 2012Date of Patent: April 4, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Tsuyoshi Kogawa, Koji Ogura, Toshiyuki Umeda, Takafumi Sakamoto, Fumi Moritsuka, Hiroaki Ishihara
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Patent number: 9608453Abstract: There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.Type: GrantFiled: January 10, 2013Date of Patent: March 28, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Shijo, Akiko Yamada, Kohei Onizuka, Fumi Moritsuka, Hiroaki Ishihara, Noriaki Oodachi, Shuichi Obayashi, Hiroki Kudo, Kenichirou Ogawa, Shoji Otaka, Hiroki Shoki
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Patent number: 9515606Abstract: According to an embodiment, there is provided with an oscillator including: a clock circuit, a power supply current source and an oscillating circuit wherein the clock circuit generates a clock signal, the power supply current source generates a power supply current according to the clock signal, and the oscillating circuit generates an oscillation signal of a higher frequency than a frequency of the clock signal based on the power supply current and a received signal from an input terminal, the received signal having amplitude of a predetermined level or more.Type: GrantFiled: June 18, 2012Date of Patent: December 6, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki Umeda, Shoji Otaka
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Patent number: 9343225Abstract: There provided a power receiving device connectable with a first load circuit operating according to AC power from a power transmitting device in which the power receiver receives the AC power from the power transmitting device via magnetic coupling, the impedance adjuster is capable of converting at least one of voltage and current of the AC power received at the power receiver, the controller controls increase in output voltage of the power transmitting device, the AC power is supplied to the first load circuit via the impedance adjuster when the first load circuit is connected to the power receiving device, and the controller controls the impedance adjuster such that an input impedance of the impedance adjuster is lower than an input impedance of the first load circuit during at least a part of a time period where the output voltage of the power transmitting device is increased.Type: GrantFiled: December 17, 2012Date of Patent: May 17, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Kohei Onizuka, Shoji Otaka, Hiroaki Ishihara, Fumi Moritsuka
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Patent number: 9325362Abstract: A rectification circuit includes a first field-effect transistor and a bias voltage generation circuit. The field-effect transistor includes a first gate terminal, a first source terminal, a first source region having a first p-type diffusion layer and connected to the first source terminal, a first drain terminal, and a first drain region having a first n-type diffusion layer and connected to the first drain terminal. The bias voltage generation circuit is configured to apply a DC voltage between the first gate terminal and the first drain terminal.Type: GrantFiled: August 22, 2013Date of Patent: April 26, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki Umeda, Shoji Otaka
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Patent number: 9281830Abstract: A radio apparatus includes a first receiver that is a processing unit for amplifying and frequency converting a radio signal received via an antenna, thereby outputting an IF signal; a detector unit for detecting a preamble signal from the IF signal; a second receiver for amplifying and quadrature demodulating the radio signal, thereby generating an I-signal and a Q-signal; a demodulator unit for demodulating the I-signal and Q-signal to generate a data signal; and a control unit for halting the operation of the first receiver and further activating the second receiver when the detector unit detects the preamble signal and for activating the first receiver and halting the operation of the second receiver when the demodulator unit completes the demodulation of the I-signal and Q-signal.Type: GrantFiled: March 15, 2012Date of Patent: March 8, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Takafumi Yamaji, Tsutomu Sugawara, Yasuhiko Tanabe, Masahiro Hosoya, Hiroki Sakurai
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Patent number: 9219459Abstract: A receiving device includes a rectifier configured to rectify a received signal and a bias supply unit configured to intermittently supply the rectifier with a bias voltage corresponding to a threshold voltage of the rectifier. The receiving device further includes a detector configured to detect the received signal based on an output of the rectifier and a controller configured to control the bias supply unit to stop supplying the bias voltage upon detection of the received signal by the detector.Type: GrantFiled: September 13, 2012Date of Patent: December 22, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki Umeda, Shoji Otaka
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Patent number: 9025408Abstract: According to an embodiment, a semiconductor integrated circuit includes a regulator, a level shifter and a switch circuit. The regulator converts an input voltage that is a difference in potential between a first terminal and a third terminal into an output voltage that is a difference in potential between a second terminal and the third terminal. The level shifter adjusts a voltage level between a first terminal and a second terminal. The switch circuit includes a first switch selectively connecting the third terminal of the regulator to a first potential, a second switch selectively connecting the third terminal of the regulator to the first terminal of the level shifter, and a third switch selectively connecting the third terminal of the regulator to a second potential.Type: GrantFiled: April 22, 2014Date of Patent: May 5, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Toshiyuki Umeda, Shoji Otaka
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Patent number: 8958767Abstract: A radio apparatus includes an antenna; an amplifier that amplifies a radio signal, received via the antenna; a first mixer that frequency converts the amplified radio signal to generate a first analog signal; a first A/D converter that converts the first analog signal to generate a first digital signal; a second mixer that frequency converts the amplified signal to generate a second analog signal; a second A/D converter means that converts the second analog signal to generate a second digital signal; a demodulator means that demodulates the first and second digital signals to generate a demodulated signal; a detector that detects a preamble from the first digital signal; and a control means that halts the second mixer and second A/D converter during the wait for the radio signal and that activates the second mixer and second A/D converter when the detector detects the preamble.Type: GrantFiled: March 16, 2012Date of Patent: February 17, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Shoji Otaka, Takafumi Yamaji, Tsutomu Sugawara, Yasuhiko Tanabe, Masahiro Hosoya, Hiroki Sakurai
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Publication number: 20140362655Abstract: According to an embodiment, a semiconductor integrated circuit includes a regulator, a level shifter and a switch circuit. The regulator converts an input voltage that is a difference in potential between a first terminal and a third terminal into an output voltage that is a difference in potential between a second terminal and the third terminal. The level shifter adjusts a voltage level between a first terminal and a second terminal. The switch circuit includes a first switch selectively connecting the third terminal of the regulator to a first potential, a second switch selectively connecting the third terminal of the regulator to the first terminal of the level shifter, and a third switch selectively connecting the third terminal of the regulator to a second potential.Type: ApplicationFiled: April 22, 2014Publication date: December 11, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki UMEDA, Shoji OTAKA
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Publication number: 20140339905Abstract: A foreign object detection device has a foreign object detector configured to detect a foreign object when a power receiver receives power from a power transmitter in a non-contact manner, the foreign object detector being arranged between the power receiver and the power transmitter, and a power control signal generator configured to generate a power control signal which controls the power transmitted from the power transmitter when the foreign object is detected by the foreign object detectorType: ApplicationFiled: March 11, 2014Publication date: November 20, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Fumi MORITSUKA, Kohei ONIZUKA, Hiroki KUDO, Shoji OTAKA, Hiroaki ISHIHARA, Katsuyuki IKEUCHI
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Publication number: 20140253027Abstract: According to an embodiment, there is provided a power receiver including: a first rectifying circuit, a second rectifying circuit, a connecting part and a controller. The first rectifying circuit rectifies a first AC power generated by a first AC power generating device. The second rectifying circuit rectifies a second AC power generated by a second AC power generating device. The connecting part electrically connects an output terminal of the first rectifying circuit and an output terminal of the second rectifying circuit, in parallel. The controller performs a control such that the first AC power generating device and the second AC power generating device do not operate simultaneously.Type: ApplicationFiled: February 28, 2014Publication date: September 11, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shuichi OBAYASHI, Shoji Otaka, Tetsu Shijo
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Publication number: 20140139035Abstract: There is provided a wireless power transmission controller in which the input device receives first power information from a power transmitting device, indicating electric power transmitted by the power transmitting device, and second power information from a power receiving device, indicating electric power received by the power receiving device, the output device outputs a first control signal instructing a transmission voltage of the power transmitting device, and a second control signal instructing an impedance of the power receiving device, the control device performs raising control of transmission power of the power transmitting device by generating the second control signal so that a difference between the first and second power information becomes small, and generates the first control signal so that a difference between the first power information and a first target value or a difference between the second power information and a second target value becomes small.Type: ApplicationFiled: November 12, 2013Publication date: May 22, 2014Inventors: Hiroaki ISHIHARA, Kohei ONIZUKA, Fumi MORITSUKA, Shoji OTAKA
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Publication number: 20140093016Abstract: A rectification circuit includes a first field-effect transistor and a bias voltage generation circuit. The field-effect transistor includes a first gate terminal, a first source terminal, a first source region having a first p-type diffusion layer and connected to the first source terminal, a first drain terminal, and a first drain region having a first n-type diffusion layer and connected to the first drain terminal. The bias voltage generation circuit is configured to apply a DC voltage between the first gate terminal and the first drain terminal.Type: ApplicationFiled: August 22, 2013Publication date: April 3, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Toshiyuki UMEDA, Shoji Otaka
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Patent number: 8655295Abstract: According to one embodiment, a receiving apparatus includes a variable gain amplifier, comparator, and signal processor. The comparator compares a signal level of the second signal with a first threshold to generate a third signal, a signal level of the third signal being set to a high signal if the signal level of the second signal is greater than the first threshold. The signal processor determines presence of a signal if a rate of high signals in third signals for a period is greater than a second threshold. The second threshold is set to a first value when the control of the gain is performed and set to a second value when the demodulation processing is performed. The first value is greater than the second value.Type: GrantFiled: February 10, 2012Date of Patent: February 18, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Tsuyoshi Kogawa, Koji Ogura, Shoji Otaka, Hiroaki Ishihara
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Patent number: 8588118Abstract: A wireless communication device includes: a packet detection part detecting presence/absence of a reception of a packet; a judgment part judging whether or not temporal change of presence/absence of the reception of the packet detected in the packet detection part corresponds to a predetermined identifier; and a power source control unit controlling power supply from a power source based on a result of a judgment in the judgment part.Type: GrantFiled: October 31, 2008Date of Patent: November 19, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Takafumi Sakamoto, Kiyoshi Toshimitsu, Toshiyuki Umeda, Shoji Otaka, Keisuke Mera
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Publication number: 20130249676Abstract: A receiving device includes a rectifier configured to rectify a received signal and a bias supply unit configured to intermittently supply the rectifier with a bias voltage corresponding to a threshold voltage of the rectifier. The receiving device further includes a detector configured to detect the received signal based on an output of the rectifier and a controller configured to control the bias supply unit to stop supplying the bias voltage upon detection of the received signal by the detector.Type: ApplicationFiled: September 13, 2012Publication date: September 26, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki UMEDA, Shoji Otaka