Patents by Inventor Kanji Kitamura
Kanji Kitamura 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: 10749524Abstract: An isolator circuit according to the present invention includes a first isolator, an AD converter, and a second isolator. The first isolator is configured to galvanically isolate a first terminal and a second terminal from each other. The first isolator receives an input pulse signal and outputs an output pulse signal to the second terminal. The AD converter is configured to output a digital signal corresponding to a duty ratio of the output pulse signal. The second isolator is configured to galvanically isolate the second terminal and the third terminal from each other. The second isolator is configured to receive the digital signal and outputs a feedback pulse signal to the third terminal.Type: GrantFiled: January 18, 2017Date of Patent: August 18, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Takamori, Kanji Kitamura, Tetsuya Masaoka
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Publication number: 20190334521Abstract: An isolator circuit according to the present invention includes a first isolator, an AD converter, and a second isolator. The first isolator is configured to 51galvanically isolate a first terminal and a second terminal from each other. The first isolator receives an input pulse signal and outputs an output pulse signal to the second terminal. The AD converter is configured to output a digital signal corresponding to a duty ratio of the output pulse signal. The second isolator is configured to galvanically isolate the second terminal and the third terminal from each other. The second isolator is configured to receive the digital signal and outputs a feedback pulse signal to the third terminal.Type: ApplicationFiled: January 18, 2017Publication date: October 31, 2019Applicant: Mitsubishi Electric CorporationInventors: Takahiro TAKAMORI, Kanji KITAMURA, Tetsuya MASAOKA
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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: 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: 7701989Abstract: A laser diode driving apparatus comprising an oscillator (11) for generating a high-frequency signal; an amplifier (12) for amplifying the high-frequency signal and outputting the amplified high-frequency signal; current mirror circuits (7, 8 and 9) for receiving the output current of the amplifier (12) and driving multiple laser diodes (1, 2 and 3), respectively; a DC current supply source (10) for supplying a DC current to the current mirror circuits, wherein the laser diode is driven using a current obtained by superimposing the high-frequency signal on the DC current, the laser diode driving apparatus further comprising a high-frequency signal superimposed amplitude setting circuit (14) for changing the amplitude of the amplifier so as to be suited for the selection of the current mirror circuit.Type: GrantFiled: June 5, 2007Date of Patent: April 20, 2010Assignee: Panasonic CorporationInventor: Kanji Kitamura
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Publication number: 20070280316Abstract: A laser diode driving apparatus comprising an oscillator (11) for generating a high-frequency signal; an amplifier (12) for amplifying the high-frequency signal and outputting the amplified high-frequency signal; current mirror circuits (7, 8 and 9) for receiving the output current of the amplifier (12) and driving multiple laser diodes (1, 2 and 3), respectively; a DC current supply source (10) for supplying a DC current to the current mirror circuits, wherein the laser diode is driven using a current obtained by superimposing the high-frequency signal on the DC current, the laser diode driving apparatus further comprising a high-frequency signal superimposed amplitude setting circuit (14) for changing the amplitude of the amplifier so as to be suited for the selection of the current mirror circuit.Type: ApplicationFiled: June 5, 2007Publication date: December 6, 2007Applicant: Matsushita Electric Industrial Co., Ltd.Inventor: Kanji KITAMURA
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Patent number: 5035499Abstract: Spectacles having a lens frame corner and an engaging arm end. The lens frame corner includes a parallelepiped block extending from the lens frame and having a top and a bottom surfaces. Each of the top and bottom surfaces of the block has a recess or a hole, a first groove having a semicircular section, and a second groove having a semicircular section at right angle with the first grooves. The arm end include a pair of parallel planar strips. The distance between the upper strip and the lower strip is such that it allows forcible insertion of the block of the frame corner. Each of the strip has a cylindrical projection facing each other which, in use, is inserted into the recess or the hole of the block and a linear projection having a semicircular section, which, in use, is inserted into one of the grooves of the block.Type: GrantFiled: June 13, 1990Date of Patent: July 30, 1991Assignees: Hokushin Corporation, Kawamoto Optical Industrial Company LimitedInventors: Kanji Kitamura, Shuichi Kawamoto