Patents by Inventor Yoshinori Tatenuma
Yoshinori Tatenuma 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: 11598826Abstract: The magnetic detection device includes: a first magnetic rotary body which rotates about a rotation shaft and has an outer circumferential portion which is a magnetic body; a second magnetic rotary body has an outer circumferential portion which is a magnetic body; a magnet which has a magnetization direction along the axial direction; a first magneto-resistive element provided on another side in the axial direction of the magnet; a second magneto-resistive element provided on one side in the axial direction of the magnet; a first magnetic guide provided between the magnet and the first magneto-resistive element; and a second magnetic guide provided between the magnet and the second magneto-resistive element, wherein the outer circumferential portion of the first magnetic rotary body and the outer circumferential portion of the second magnetic rotary body cause different magnetic fields between the magnet and the respective outer circumferential portions.Type: GrantFiled: September 22, 2020Date of Patent: March 7, 2023Assignee: Mitsubishi Electric CornorationInventors: Tetsuo Amano, Hideki Shimauchi, Masahiro Yokotani, Yoshinori Tatenuma, Akira Koshimizu
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Publication number: 20210286027Abstract: The magnetic detection device includes: a first magnetic rotary body which rotates about a rotation shaft and has an outer circumferential portion which is a magnetic body; a second magnetic rotary body has an outer circumferential portion which is a magnetic body; a magnet which has a magnetization direction along the axial direction; a first magneto-resistive element provided on another side in the axial direction of the magnet; a second magneto-resistive element provided on one side in the axial direction of the magnet; a first magnetic guide provided between the magnet and the first magneto-resistive element; and a second magnetic guide provided between the magnet and the second magneto-resistive element, wherein the outer circumferential portion of the first magnetic rotary body and the outer circumferential portion of the second magnetic rotary body cause different magnetic fields between the magnet and the respective outer circumferential portions.Type: ApplicationFiled: September 22, 2020Publication date: September 16, 2021Applicant: Mitsubishi Electric CorporationInventors: Tetsuo AMANO, Hideki SHIMAUCHI, Masahiro YOKOTANI, Yoshinori TATENUMA, Akira KOSHIMIZU
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Patent number: 10605622Abstract: To obtain a magnetic detection device which can detect a direction of movement of a magnetic moving body immediately right after a reset release of the magnetic detection device. The magnetic detection device includes a signal change detector which detects the peak, bottom, and gradient of an output signal of a first magnetoelectric conversion element group and the peak, bottom, and gradient of an output signal of a second magnetoelectric conversion element group, wherein a direction of movement of a magnetic moving body is detected based on the gradient of increase or decrease of one of the output signal or the output signal at the timing of a detection of the peak or bottom of the other.Type: GrantFiled: April 19, 2018Date of Patent: March 31, 2020Assignee: Mitsubishi Electric CorporationInventor: Yoshinori Tatenuma
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Patent number: 10466075Abstract: There is provided a magnetic detection apparatus in which based on a second comparison signal or a first comparison signal, a second analog/digital conversion circuit or a first analog/digital conversion circuit converts a second amplification signal or a first amplification signal into a digital value at a time when the peak value of the first amplification signal or the second amplification signal is detected or at a time when the bottom value of the first amplification signal or the second amplification signal is detected, as the case may be, and that can implement at least one of actions in which based on comparison between the digital value converted and a predetermined reference value, a second threshold value adjusting apparatus or a first threshold value adjusting apparatus adjusts a second threshold value or a first threshold value, as the case may be.Type: GrantFiled: March 5, 2015Date of Patent: November 5, 2019Assignee: Mitsubishi Electric CorporationInventors: Yoshinori Tatenuma, Masahiro Yokotani, Akira Koshimizu
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Publication number: 20190195655Abstract: To obtain a magnetic detection device which can detect a direction of movement of a magnetic moving body immediately right after a reset release of the magnetic detection device. The magnetic detection device includes a signal change detector which detects the peak, bottom, and gradient of an output signal of a first magnetoelectric conversion element group and the peak, bottom, and gradient of an output signal of a second magnetoelectric conversion element group, wherein a direction of movement of a magnetic moving body is detected based on the gradient of increase or decrease of one of the output signal or the output signal at the timing of a detection of the peak or bottom of the other.Type: ApplicationFiled: April 19, 2018Publication date: June 27, 2019Applicant: Mitsubishi Electric CorporationInventor: Yoshinori TATENUMA
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Patent number: 10110215Abstract: Provided is a comparator configured to compare input voltages, which are input to a first dynamic comparator and a second dynamic comparator, with a reference voltage, select either an output signal of the first dynamic comparator or an output signal of the second dynamic comparator based on the comparison result, output the selected output signal, and control clock signals, which are input to the first dynamic comparator and the second dynamic comparator respectively, based on the comparison result, so as to stop the operation of the dynamic comparator of which output signal is not selected.Type: GrantFiled: July 17, 2017Date of Patent: October 23, 2018Assignee: Mitsubishi Electric CorporationInventors: Hideki Shimauchi, Kanji Kitamura, Mutsuo Daito, Akio Kamimurai, Masatoshi Uchino, Yoshinori Tatenuma, Akira Koshimizu
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Publication number: 20180292236Abstract: There is provided a magnetic detection apparatus in which based on a second comparison signal or a first comparison signal, a second analogue/digital conversion circuit or a first analogue/digital conversion circuit converts a second amplification signal or a first amplification signal into a digital value at a time when the peak value of the first amplification signal or the second amplification signal is detected or at a time when the bottom value of the first amplification signal or the second amplification signal is detected, as the case may be, and that can implement at least one of actions in which based on comparison between the digital value converted and a predetermined reference value, a second threshold value adjusting apparatus or a first threshold value adjusting apparatus adjusts a second threshold value or a first threshold value, as the case may be.Type: ApplicationFiled: March 5, 2015Publication date: October 11, 2018Applicant: Mitsubishi Electric CorporationInventors: Yoshinori TATENUMA, Masahiro YOKOTANI, Akira KOSHIMIZU
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Patent number: 10084464Abstract: Provided is an AD converter having a rail-to-rail input voltage range and being free of a missing code and monotonicity loss. A comparator includes a first comparator having an NMOS differential input stage, a second comparator having a PMOS differential input stage, and an output selection circuit configured to select any one of outputs of the two comparators. A correction circuit acquires in advance a first AD converted value in the case of using the first comparator and a second AD converted value in the case of using the second comparator with respect to the same input voltage to calculate a correction value, and performs correction processing based on the correction value to suppress an offset error between the first AD converted value and the second AD converted value.Type: GrantFiled: March 28, 2018Date of Patent: September 25, 2018Assignee: Mitsubishi Electric CorporationInventors: Hideki Shimauchi, Akio Kamimurai, Takeharu Umegami, Yoshinori Tatenuma
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Publication number: 20180226961Abstract: Provided is a comparator configured to compare input voltages, which are input to a first dynamic comparator and a second dynamic comparator, with a reference voltage, select either an output signal of the first dynamic comparator or an output signal of the second dynamic comparator based on the comparison result, output the selected output signal, and control clock signals, which are input to the first dynamic comparator and the second dynamic comparator respectively, based on the comparison result, so as to stop the operation of the dynamic comparator of which output signal is not selected.Type: ApplicationFiled: July 17, 2017Publication date: August 9, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hideki SHIMAUCHI, Kanji KITAMURA, Mutsuo DAITO, Akio KAMIMURAI, Masatoshi UCHINO, Yoshinori TATENUMA, Akira KOSHIMIZU
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Patent number: 9983274Abstract: A magnetic detection in which a first element (3) and a second element (4) that are a magnetoresistance element whose resistance value changes in response to an external magnetic field are connected in series with each other so as to form a bridge circuit, one end of the bridge circuit is connected to a power supply (5), the other end thereof is grounded, a connecting point (6) between the first element (3) and the second element (4) is connected to an amplifier means (9), at least one switching means (1) is connected in series with the bridge circuit, and an output terminal (11) of the amplifier means (9) is connected to a failure detection means (12).Type: GrantFiled: January 23, 2014Date of Patent: May 29, 2018Assignee: Mitsubishi Electric CorporationInventors: Yoshinori Tatenuma, Junichi Ichikawa
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Publication number: 20160223625Abstract: A magnetic detection in which a first element (3) and a second element (4) that are a magnetoresistance element whose resistance value changes in response to an external magnetic field are connected in series with each other so as to form a bridge circuit, one end of the bridge circuit is connected to a power supply (5), the other end thereof is grounded, a connecting point (6) between the first element (3) and the second element (4) is connected to an amplifier means (9), at least one switching means (1) is connected in series with the bridge circuit, and an output terminal (11) of the amplifier means (9) is connected to a failure detection means (12).Type: ApplicationFiled: January 23, 2014Publication date: August 4, 2016Applicant: Mitsubishi Electric CorporationInventors: Yoshinori TATENUMA, Junichi ICHIKAWA
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Patent number: 9091566Abstract: A differential amplifier generates an offset correction signal based on a rotation detection signal from a rotation detector apparatus and an offset signal. A comparator compares the offset correction signal with a threshold voltage, and outputs a binarized signal representing the comparison result. An average value signal generator circuit generates an average value signal representing the average value of the offset correction signal. The offset signal generator circuit generates the offset signal so that the signal voltage of the average value signal has a voltage value between a threshold voltage and a threshold voltage.Type: GrantFiled: November 29, 2010Date of Patent: July 28, 2015Assignee: Mitsubishi Electric CorporationInventors: Manabu Tsukamoto, Kazuyasu Nishikawa, Takashi Tokunaga, Hideki Shimauchi, Yoshinori Tatenuma, Yuji Kawano, Hiroshi Kobayashi
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Publication number: 20140125328Abstract: For the purpose of obtaining a magnetic detection device which accurately detects rotational angle information of an object to be detected in a simpler configuration, the magnetic detection device includes a magnetoresistive element composed of: a magnetization fixed layer, a magnetization free layer, and a nonmagnetic intermediate layer sandwiched between the magnetization fixed layer and the magnetization free layer. A potential difference between both ends of the magnetoresistive element is fixed voltage, and a change in current value of the magnetoresistive element with respect to a change in magnetic field is detected.Type: ApplicationFiled: April 23, 2013Publication date: May 8, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshinori TATENUMA, Yuji KAWANO
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Patent number: 8497674Abstract: A magnetic detection apparatus includes a first comparison circuit that waveform-shapes the amplitude of a detection signal from magneto-electric transducers by DC coupling, a third comparison circuit that waveform-shapes the detection signal by AC coupling, an oscillation circuit having a natural frequency, a control circuit that counts the output of the first comparison circuit by using the oscillation means, and a selection circuit that selects the output of the first comparison means and the output of the second comparison means. The control circuit counts rising from the next rising or falling from the next falling of an output rectangular wave of the first comparison circuit, and provides output to the selection circuit at the time point at which the count value reaches a desired value. The selection circuit selects and outputs the output rectangular wave of the first comparison circuit or the third comparison circuit.Type: GrantFiled: October 19, 2010Date of Patent: July 30, 2013Assignee: Mitsubishi Electric CorporationInventors: Yoshinori Tatenuma, Hideki Shimauchi, Masahiro Yokotani, Yuji Kawano, Hiroshi Kobayashi, Kazuyasu Nishikawa, Manabu Tsukamoto
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Patent number: 8354840Abstract: A magnetic detection device includes a signal processing circuit that detects a moving position and a moving direction of a magnetic mobile object using an output of a comparing circuit configured to output a signal by comparing an output signal of a magneto-electric transducer element with a threshold. A duration during which an output of the signal processing circuit is in a high level or in a low level is fixed to a period t1 or a period t2 depending on the moving direction of the magnetic mobile object. When switching of the moving direction of the magnetic mobile object takes place within the period t1 or the period t2, the signal processing circuit outputs a position signal same as a position signal indicating a position immediately before the switching of the moving direction of the magnetic mobile object due to hysteresis of the threshold of the comparing circuit.Type: GrantFiled: May 6, 2010Date of Patent: January 15, 2013Assignee: Mitsubishi Electric CorporationInventors: Hideki Shimauchi, Hiroshi Kobayashi, Yuji Kawano, Yoshinori Tatenuma
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Publication number: 20130002242Abstract: A differential amplifier generates an offset correction signal based on a rotation detection signal from a rotation detector apparatus and an offset signal. A comparator compares the offset correction signal with a threshold voltage, and outputs a binarized signal representing the comparison result. An average value signal generator circuit generates an average value signal representing the average value of the offset correction signal. The offset signal generator circuit generates the offset signal so that the signal voltage of the average value signal has a voltage value between a threshold voltage and a threshold voltage.Type: ApplicationFiled: November 29, 2010Publication date: January 3, 2013Applicant: Mitsubishi Electric CorporationInventors: Manabu Tsukamoto, Kazuyasu Nishikawa, Takashi Tokunaga, Hideki Shimauchi, Yoshinori Tatenuma, Yuji Kawano, Hiroshi Kobayashi
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Patent number: 8260568Abstract: Provided is an apparatus for detecting a moving direction that can accurately detect the position, regardless of the moving direction. The moving direction detector includes groups of sensor elements that face a moving body to output detection signals in accordance with travel of the moving body. The detector includes signal processing units that convert output signals of the groups of sensor elements into rectangular waves and a moving direction detection unit that outputs a signal corresponding to a moving direction of the moving body based on the detection signals from the groups of sensor elements. The moving direction detection unit includes a delay function of generating an output signal at a time instant that is delayed by a predetermined time from a time instant when a moving direction of the moving body is changed.Type: GrantFiled: April 14, 2009Date of Patent: September 4, 2012Assignee: Mitsubishi Electric CorporationInventors: Yoshinori Tatenuma, Yuji Kawano, Hiroshi Kobayashi
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Publication number: 20110260724Abstract: A magnetic detection apparatus includes a first comparison circuit that waveform-shapes the amplitude of a detection signal from magneto-electric transducers by DC coupling, a third comparison circuit that waveform-shapes the detection signal by AC coupling, an oscillation circuit having a natural frequency, a control circuit that counts the output of the first comparison circuit by using the oscillation means, and a selection circuit that selects the output of the first comparison means and the output of the second comparison means. The control circuit counts rising from the next rising or falling from the next falling of an output rectangular wave of the first comparison circuit, and provides output to the selection circuit at the time point at which the count value reaches a desired value. The selection circuit selects and outputs the output rectangular wave of the first comparison circuit or the third comparison circuit.Type: ApplicationFiled: October 19, 2010Publication date: October 27, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshinori TATENUMA, Hideki SHIMAUCHI, Masahiro YOKOTANI, Yuji KAWANO, Hiroshi KOBAYASHI, Kazuyasu NISHIKAWA, Manabu TSUKAMOTO
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Patent number: 7982456Abstract: In a magnetic detection apparatus, a magnetic detection sensor generates a sensor output signal whose high level and low level have different potentials in accordance with the moving direction of a magnetic moving object, and a computer unit includes three comparator circuits and detects the output signal of the magnetic detection sensor with three levels of comparison threshold values, so that the moving direction of the magnetic moving object can be detected accurately without any delay.Type: GrantFiled: November 25, 2008Date of Patent: July 19, 2011Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yuji Kawano, Hiroshi Kobayashi, Yoshinori Tatenuma, Masahiro Yokotani
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Publication number: 20110101965Abstract: A magnetic detection device includes a signal processing circuit that detects a moving position and a moving direction of a magnetic mobile object using an output of a comparing circuit configured to output a signal by comparing an output signal of a magneto-electric transducer element with a threshold. A duration during which an output of the signal processing circuit is in a high level or in a low level is fixed to a period t1 or a period t2 depending on the moving direction of the magnetic mobile object. When switching of the moving direction of the magnetic mobile object takes place within the period t1 or the period t2, the signal processing circuit outputs a position signal same as a position signal indicating a position immediately before the switching of the moving direction of the magnetic mobile object due to hysteresis of the threshold of the comparing circuit.Type: ApplicationFiled: May 6, 2010Publication date: May 5, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hideki SHIMAUCHI, Hiroshi KOBAYASHI, Yuji KAWANO, Yoshinori TATENUMA