Patents by Inventor Tatsuro Midorikawa
Tatsuro Midorikawa 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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Publication number: 20230352103Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: July 10, 2023Publication date: November 2, 2023Applicant: KIOXIA CORPORATIONInventors: Tatsuro MIDORIKAWA, Masami MASUDA
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Patent number: 11742033Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: January 10, 2022Date of Patent: August 29, 2023Assignee: Kioxia CorporationInventors: Tatsuro Midorikawa, Masami Masuda
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Publication number: 20220130471Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: January 10, 2022Publication date: April 28, 2022Applicant: Kioxia CorporationInventors: Tatsuro MIDORIKAWA, Masami MASUDA
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Patent number: 11250919Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: September 24, 2020Date of Patent: February 15, 2022Assignee: KIOXIA CORPORATIONInventors: Tatsuro Midorikawa, Masami Masuda
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Publication number: 20210012843Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: September 24, 2020Publication date: January 14, 2021Applicant: TOSHIBA MEMORY CORPORATIONInventors: Tatsuro MIDORIKAWA, Masami MASUDA
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Patent number: 10818364Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: October 31, 2019Date of Patent: October 27, 2020Assignee: TOSHIBA MEMORY CORPORATIONInventors: Tatsuro Midorikawa, Masami Masuda
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Publication number: 20200066359Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: October 31, 2019Publication date: February 27, 2020Applicant: TOSHIBA MEMORY CORPORATIONInventors: Tatsuro MIDORIKAWA, Masami MASUDA
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Patent number: 10515706Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: February 12, 2019Date of Patent: December 24, 2019Assignee: TOSHIBA MEMORY CORPORATIONInventors: Tatsuro Midorikawa, Masami Masuda
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Publication number: 20190180827Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: February 12, 2019Publication date: June 13, 2019Applicant: TOSHIBA MEMORY CORPORATIONInventors: Tatsuro MIDORIKAWA, Masami MASUDA
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Patent number: 10242748Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: January 27, 2017Date of Patent: March 26, 2019Assignee: TOSHIBA MEMORY CORPORATIONInventors: Tatsuro Midorikawa, Masami Masuda
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Publication number: 20170140831Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: January 27, 2017Publication date: May 18, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tatsuro MIDORIKAWA, Masami MASUDA
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Patent number: 9589656Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: April 21, 2014Date of Patent: March 7, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tatsuro Midorikawa, Masami Masuda
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Patent number: 8976606Abstract: A voltage generating circuit includes first and second step-up circuits, each having first and second input terminals and an output terminal and configured to increase a voltage level of an input signal supplied through the first input terminal and output the signal with the increased voltage level through the output terminal. The second input terminal of the first step-up circuit is connected to the output terminal of the second step-up circuit and the second input terminal of the second step-up circuit is connected to the output terminal of the first step-up circuit. The voltage generating circuit may also include third and fourth step-up circuits and fifth and sixth step-up circuits having similar configurations.Type: GrantFiled: March 1, 2013Date of Patent: March 10, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Noriyasu Kumazaki, Masafumi Uemura, Tatsuro Midorikawa
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Publication number: 20140225582Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: April 21, 2014Publication date: August 14, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tatsuro MIDORIKAWA, Masami Masuda
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Patent number: 8755235Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: GrantFiled: September 18, 2011Date of Patent: June 17, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuro Midorikawa, Masami Masuda
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Publication number: 20130322180Abstract: A voltage generating circuit includes first and second step-up circuits, each having first and second input terminals and an output terminal and configured to increase a voltage level of an input signal supplied through the first input terminal and output the signal with the increased voltage level through the output terminal. The second input terminal of the first step-up circuit is connected to the output terminal of the second step-up circuit and the second input terminal of the second step-up circuit is connected to the output terminal of the first step-up circuit. The voltage generating circuit may also include third and fourth step-up circuits and fifth and sixth step-up circuits having similar configurations.Type: ApplicationFiled: March 1, 2013Publication date: December 5, 2013Applicant: Kabushiki Kaisha ToshibaInventors: Noriyasu KUMAZAKI, Masafumi Uemura, Tatsuro Midorikawa
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Patent number: 8593874Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a first output circuit, a rectifying circuit, a second output circuit, and a detection circuit. The first boost circuit outputs a first voltage in first and second operation modes. The first output circuit is connected to the first boost circuit, and outputs the first voltage as a second voltage in the first operation mode. The rectifying circuit is connected to the first boost circuit, and outputs a third voltage which is lower than the first voltage in the first operation mode. The second output circuit short-circuits the rectifying circuit in the second operation mode, and outputs the first voltage as a fourth voltage. The detection circuit detects the second and fourth voltages which are supplied from the first and second output circuits.Type: GrantFiled: September 22, 2011Date of Patent: November 26, 2013Assignee: Kabushiki Kaisha ToshibaInventor: Tatsuro Midorikawa
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Publication number: 20120105036Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.Type: ApplicationFiled: September 18, 2011Publication date: May 3, 2012Inventors: Tatsuro MIDORIKAWA, Masami Masuda
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Publication number: 20120106255Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a first output circuit, a rectifying circuit, a second output circuit, and a detection circuit. The first boost circuit outputs a first voltage in first and second operation modes. The first output circuit is connected to the first boost circuit, and outputs the first voltage as a second voltage in the first operation mode. The rectifying circuit is connected to the first boost circuit, and outputs a third voltage which is lower than the first voltage in the first operation mode. The second output circuit short-circuits the rectifying circuit in the second operation mode, and outputs the first voltage as a fourth voltage. The detection circuit detects the second and fourth voltages which are supplied from the first and second output circuits.Type: ApplicationFiled: September 22, 2011Publication date: May 3, 2012Inventor: Tatsuro MIDORIKAWA
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Patent number: 7864614Abstract: A semiconductor memory device includes a memory cell array which includes a plurality of memory cells which are arrayed in a matrix at intersections between a plurality of word lines and a plurality of bit lines and a power supply circuit which includes a first band gap reference circuit which outputs a first output voltage, and a second band gap reference circuit which outputs a second output voltage having lower temperature characteristics than the first output voltage on a low temperature side, and generates a power supply voltage on the basis of the second output voltage at a time of a data write operation of the memory cells.Type: GrantFiled: December 18, 2008Date of Patent: January 4, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuro Midorikawa, Yasuhiko Honda, Gyosho Chin