Patents by Inventor Nobuhiro Shiramizu
Nobuhiro Shiramizu 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: 20230258558Abstract: Terahertz wave detection equipment comprises: a terahertz wave transceiver including a transmitter for transmitting a terahertz wave and a receiver for receiving a reflected terahertz wave reflected by a background reflected object which exists behind an object to be analyzed; a display; and an information processing apparatus, wherein the transmitter irradiates a terahertz wave based on a transmission signal including a specific frequency toward a two-dimensional area including the object to be analyzed, and the information processing apparatus is configured to analyze concentration of the object to be analyzed based on the reflected terahertz wave and generate a composite image in which a concentration image of the object to be analyzed is combined with an image of the background reflected object.Type: ApplicationFiled: April 24, 2023Publication date: August 17, 2023Inventors: Osamu KAWAMAE, Yukinobu TANAKA, Misako KONO, Nobuhiro SHIRAMIZU, Masuo OKU, Manabu KATSUKI, Megumi KURACHI
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Patent number: 11668650Abstract: Terahertz wave detection equipment comprises: a terahertz wave transceiver including a transmitter for transmitting a terahertz wave and a receiver for receiving a reflected terahertz wave reflected by a background reflected object which exists behind an object to be analyzed; a display; and an information processing apparatus, wherein the transmitter irradiates a terahertz wave based on a transmission signal including a specific frequency toward a two-dimensional area including the object to be analyzed, and the information processing apparatus is configured to analyze concentration of the object to be analyzed based on the reflected terahertz wave and generate a composite image in which a concentration image of the object to be analyzed is combined with an image of the background reflected object.Type: GrantFiled: May 3, 2022Date of Patent: June 6, 2023Assignee: MAXELL, LTD.Inventors: Osamu Kawamae, Yukinobu Tanaka, Misako Kono, Nobuhiro Shiramizu, Masuo Oku, Manabu Katsuki, Megumi Kurachi
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Publication number: 20220260487Abstract: Terahertz wave detection equipment comprises: a terahertz wave transceiver including a transmitter for transmitting a terahertz wave and a receiver for receiving a reflected terahertz wave reflected by a background reflected object which exists behind an object to be analyzed; a display; and an information processing apparatus, wherein the transmitter irradiates a terahertz wave based on a transmission signal including a specific frequency toward a two-dimensional area including the object to be analyzed, and the information processing apparatus is configured to analyze concentration of the object to be analyzed based on the reflected terahertz wave and generate a composite image in which a concentration image of the object to be analyzed is combined with an image of the background reflected object.Type: ApplicationFiled: May 3, 2022Publication date: August 18, 2022Inventors: Osamu KAWAMAE, Yukinobu TANAKA, Misako KONO, Nobuhiro SHIRAMIZU, Masuo OKU, Manabu KATSUKI, Megumi KURACHI
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Patent number: 11346776Abstract: Terahertz wave detection equipment comprises: a terahertz wave transceiver including a transmitter for transmitting a terahertz wave and a receiver for receiving a reflected terahertz wave reflected by a background reflected object which exists behind an object to be analyzed; a display; and an information processing apparatus, wherein the transmitter irradiates a terahertz wave based on a transmission signal including a specific frequency toward a two-dimensional area including the object to be analyzed, and the information processing apparatus is configured to analyze concentration of the object to be analyzed based on the reflected terahertz wave and generate a composite image in which a concentration image of the object to be analyzed is combined with an image of the background reflected object.Type: GrantFiled: July 20, 2018Date of Patent: May 31, 2022Assignee: MAXELL, LTD.Inventors: Osamu Kawamae, Yukinobu Tanaka, Misako Kono, Nobuhiro Shiramizu, Masuo Oku, Manabu Katsuki, Megumi Kurachi
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Publication number: 20210318234Abstract: Terahertz wave detection equipment comprises: a terahertz wave transceiver including a transmitter for transmitting a terahertz wave and a receiver for receiving a reflected terahertz wave reflected by a background reflected object which exists behind an object to be analyzed; a display; and an information processing apparatus, wherein the transmitter irradiates a terahertz wave based on a transmission signal including a specific frequency toward a two-dimensional area including the object to be analyzed, and the information processing apparatus is configured to analyze concentration of the object to be analyzed based on the reflected terahertz wave and generate a composite image in which a concentration image of the object to be analyzed is combined with an image of the background reflected object.Type: ApplicationFiled: July 20, 2018Publication date: October 14, 2021Inventors: Osamu KAWAMAE, Yukinobu TANAKA, Misako KONO, Nobuhiro SHIRAMIZU, Masuo OKU, Manabu KATSUKI, Megumi KURACHI
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Patent number: 10018557Abstract: The terahertz wave measuring device includes a pulsed laser light generation unit 1, a seed light generation unit 2, a terahertz wave generator 5 that generates terahertz waves, a terahertz wave detector 8 on which the terahertz waves that are generated from the terahertz wave generator and that have interacted with a measurement object 7 and the pump light are incident and that generates terahertz wave detection light 9, an interference optical system 11 that multiplexes the terahertz wave detection light and reference light 14 of the same wavelength as the terahertz wave detection light to generate a plurality of interfering light beams 12, a plurality of light detectors 13 that detect the interfering light beams, and a signal processing unit 16 that outputs an intensity signal and/or a phase signal of the terahertz waves by performing arithmetic operations on the outputs of the plurality of light detectors.Type: GrantFiled: March 13, 2015Date of Patent: July 10, 2018Assignee: Hitachi High-Technologies CorporationInventors: Nobuhiro Shiramizu, Hideharu Mikami, Koichi Watanabe
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Publication number: 20180080868Abstract: Provided is a terahertz wave measuring device that can provide means for improving sensitivity, removing unnecessary light, and phase difference detection.Type: ApplicationFiled: March 13, 2015Publication date: March 22, 2018Inventors: Nobuhiro SHIRAMIZU, Hideharu MIKAMI, Koichi WATANABE
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Patent number: 9835494Abstract: In order to provide a high-sensitivity terahertz wave phase difference measurement system having a high S/N ratio, terahertz interference waves are observed using a half mirror and a movable reference mirror, and the phase difference is calculated, by a terahertz wave generation/detection device that obtains a high S/N ratio by employing a terahertz wave generator for irradiating a non-linear optical crystal with angular phase-matched pump light and seed light, and a terahertz wave detector for irradiating a non-linear optical crystal with angular phase-matched pump light and terahertz waves. In order to match the optical path length of the pump light and the terahertz waves irrespective of the position of the movable reference mirror and the position of a measured object, a first optical delay device, and a second optical delay device that operates in conjunction with movement of a movable reference mirror of a Michelson interferometer, are introduced on the optical path of the pump light.Type: GrantFiled: September 22, 2014Date of Patent: December 5, 2017Assignee: Hitachi High-Technologies CorporationInventor: Nobuhiro Shiramizu
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Publication number: 20170010162Abstract: In order to provide a high-sensitivity terahertz wave phase difference measurement system having a high S/N ratio, terahertz interference waves are observed using a half mirror and a movable reference mirror, and the phase difference is calculated, by a terahertz wave generation/detection device that obtains a high S/N ratio by employing a terahertz wave generator for irradiating a non-linear optical crystal with angular phase-matched pump light and seed light, and a terahertz wave detector for irradiating a non-linear optical crystal with angular phase-matched pump light and terahertz waves. In order to match the optical path length of the pump light and the terahertz waves irrespective of the position of the movable reference mirror and the position of a measured object, a first optical delay device, and a second optical delay device that operates in conjunction with movement of a movable reference mirror of a Michelson interferometer, are introduced on the optical path of the pump light.Type: ApplicationFiled: September 22, 2014Publication date: January 12, 2017Inventor: Nobuhiro SHIRAMIZU
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Patent number: 9361978Abstract: The invention is provided to suppress a current supplied to a storage element so as not to vary for each layer in a semiconductor memory device obtained by connecting a plurality of memory cells in series. A semiconductor memory device according to the invention includes a plurality of memory cells connected in series between a first signal line and a second signal line, and supplies a different gate voltage to at least two of selection transistors included in the memory cells, respectively (refer to FIG. 2).Type: GrantFiled: September 20, 2012Date of Patent: June 7, 2016Assignee: Hitachi, Ltd.Inventors: Nobuhiro Shiramizu, Satoru Hanzawa, Akira Kotabe
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Patent number: 9335261Abstract: The time-domain spectroscopy analysis system includes a splitter for splitting pulsed light entered, a variable delayer for delaying timing of a first part of the pulsed light split by the splitter, an electromagnetic wave generator for converting a second part of the pulsed light split by the splitter into an electromagnetic wave, a detector for detecting measurement data from a pulse having passed through a measurement object subjected to the electromagnetic wave emitted from the electromagnetic wave generator, and the pulse outputted from the variable delayer, and a comparator for detecting a phase difference between the pulsed light before being entered into the electromagnetic wave generator and the pulsed light outputted from the variable delayer, wherein a result obtained by the comparator is fed back to the variable delayer.Type: GrantFiled: March 30, 2012Date of Patent: May 10, 2016Assignee: Hitachi, Ltd.Inventors: Takahiro Nakamura, Nobuhiro Shiramizu
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Publication number: 20150221367Abstract: The invention is provided to suppress a current supplied to a storage element so as not to vary for each layer in a semiconductor memory device obtained by connecting a plurality of memory cells in series. A semiconductor memory device according to the invention includes a plurality of memory cells connected in series between a first signal line and a second signal line, and supplies a different gate voltage to at least two of selection transistors included in the memory cells, respectively (refer to FIG. 2).Type: ApplicationFiled: September 20, 2012Publication date: August 6, 2015Inventors: Nobuhiro Shiramizu, Satoru Hanzawa, Akira Kotabe
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Publication number: 20150028211Abstract: The time-domain spectroscopy analysis system includes a splitter for splitting pulsed light entered, a variable delayer for delaying timing of a first part of the pulsed light split by the splitter, an electromagnetic wave generator for converting a second part of the pulsed light split by the splitter into an electromagnetic wave, a detector for detecting measurement data from a pulse having passed through a measurement object subjected to the electromagnetic wave emitted from the electromagnetic wave generator, and the pulse outputted from the variable delayer, and a comparator for detecting a phase difference between the pulsed light before being entered into the electromagnetic wave generator and the pulsed light outputted from the variable delayer, wherein a result obtained by the comparator is fed back to the variable delayer.Type: ApplicationFiled: March 30, 2012Publication date: January 29, 2015Applicant: HITACHI, LTD.Inventors: Takahiro Nakamura, Nobuhiro Shiramizu
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Patent number: 8212615Abstract: There is disclosed a variable-gain amplifier circuit that operates on a low voltage, exhibits low distortion, provides a wide range of variation, and is suitable for use in a low-power-consumption wireless communication system. The variable-gain amplifier circuit is configured so that a variable-load circuit, which includes three reactance function elements and provides a wide range of impedance variation, is connected to a conductor circuit whose output terminal generates a positive-phase output current proportional to conductance with respect to an input voltage.Type: GrantFiled: April 22, 2010Date of Patent: July 3, 2012Assignee: Hitachi, Ltd.Inventors: Toru Masuda, Nobuhiro Shiramizu, Takahiro Nakamura, Katsuyoshi Washio
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Patent number: 8121579Abstract: The present invention provides a semiconductor integrated circuit including an active mixer circuit that is operated at low voltage, low noise, and low power consumption. It includes a transconductance amplifier, a transformer, and a multiplier, connects a transformer between the transconductance amplifier and the multiplier, and separates between the transconductance amplifier and the multiplier with respect to direct current inside the transformer. Further, each of the tranconductance amplifier and the multiplier is configured of transistors that are single-stacked between the supply voltage terminal and ground terminal.Type: GrantFiled: February 12, 2009Date of Patent: February 21, 2012Assignee: Hitachi, Ltd.Inventors: Nobuhiro Shiramizu, Toru Masuda, Takahiro Nakamura, Katsuyoshi Washio, Masamichi Tanabe
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Publication number: 20100271122Abstract: There is disclosed a variable-gain amplifier circuit that operates on a low voltage, exhibits low distortion, provides a wide range of variation, and is suitable for use in a low-power-consumption wireless communication system. The variable-gain amplifier circuit is configured so that a variable-load circuit, which includes three reactance function elements and provides a wide range of impedance variation, is connected to a conductor circuit whose output terminal generates a positive-phase output current proportional to conductance with respect to an input voltage.Type: ApplicationFiled: April 22, 2010Publication date: October 28, 2010Inventors: Toru MASUDA, Nobuhiro Shiramizu, Takahiro Nakamura, Katsuyoshi Washio
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Patent number: 7821335Abstract: The variable gain amplifier includes a bias circuit (BC) 1, a matching circuit (MC) 2, a variable gain resistive feedback amplifier (FA) 3 and an output follower (EA) 4. The resistance values of the load resistance Rc and feedback resistance Rf are changed in cooperation. In a case of making the load resistance Rc a high resistance to set the low noise amplifier to a high gain, the feedback resistance Rf is also made a high resistance, the feedback time constant ?fb(c1)?2?·RfCbe/(1+gmRc) of the closed loop of the resistive negative feedback amplifier 3 becomes substantially constant, and then the amplifier has a gain small in frequency dependency over a wide bandwidth. In a case of making the load resistance Rc a low resistance to set the low noise amplifier to a low gain, the feedback resistance Rf is also made a low resistance. The feedback resistance Rf with the low resistance increases the negative feedback quantity, and thus the amplifier is set to a low gain.Type: GrantFiled: October 16, 2008Date of Patent: October 26, 2010Assignee: Renesas Electronics CorporationInventors: Nobuhiro Shiramizu, Toru Masuda
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Patent number: 7642618Abstract: Semiconductor devices are provided with high performance high-frequency circuits in which interference caused by inductors is reduced. In a semiconductor device including a modulator circuit to modulate a carrier wave by a base band signal to output an RF signal and a demodulator circuit to demodulate the RF signal by use of the carrier wave to gain the base band signal and a local oscillator to generate the carrier wave, inductors respectively having a closed loop wire are adopted. Interference caused by mutual inductance is reduced by the closed loop wire. For example, where inductors are adopted in the modulator circuit, a closed loop wire is disposed around the outer periphery of the inductors.Type: GrantFiled: July 19, 2005Date of Patent: January 5, 2010Assignee: Renesas Technology Corp.Inventors: Nobuhiro Shiramizu, Takahiro Nakamura, Toru Masuda, Nobuhiro Kasa, Hiroshi Mori
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Patent number: 7592877Abstract: In a variable frequency oscillator in a semiconductor device, as the variation of an oscillation frequency caused by the variation of temperature and supply voltage and process variation is large, it is difficult to reduce the conversion ratio of control voltage dependent upon phase noise and the oscillation frequency and therefore, phase noise is large. The variation of the oscillation frequency is suppressed and phase noise is reduced by connecting a voltage-to-current conversion circuit that converts input control voltage to control current of a ring oscillator to the ring oscillator where delay circuits a delay time of which increases and decreases according to the amplitude of input control current are cascade-connected by a plurality of stages in a ring and increasing/decreasing current dependent upon any of temperature, supply voltage and the threshold voltage of a transistor inside the voltage-to-current conversion circuit.Type: GrantFiled: June 29, 2007Date of Patent: September 22, 2009Assignee: Hitachi, Ltd.Inventors: Nobuhiro Shiramizu, Toru Masuda
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Publication number: 20090221259Abstract: The present invention provides a semiconductor integrated circuit including an active mixer circuit that is operated at low voltage, low noise, and low power consumption. It includes a transconductance amplifier, a transformer, and a multiplier, connects a transformer between the transconductance amplifier and the multiplier, and separates between the transconductance amplifier and the multiplier with respect to direct current inside the transformer. Further, each of the tranconductance amplifier and the multiplier is configured of transistors that are single-stacked between the supply voltage terminal and ground terminal.Type: ApplicationFiled: February 12, 2009Publication date: September 3, 2009Inventors: Nobuhiro SHIRAMIZU, Toru Masuda, Takahiro Nakamura, Katsuyoshi Washio, Masamichi Tanabe