Patents by Inventor Shinichi Hori
Shinichi Hori 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: 20150222461Abstract: A transmitter includes: a modulation circuit for modulating a baseband signal into a multi-bit digital signal containing a radio frequency band component; a plurality of switch mode amplifiers each provided corresponding to a respective bit of the multi-bit digital signal supplied from the modulation circuit; and a signal-synthesizing circuit. The signal-synthesizing circuit connects a band-restricting unit that restricts the band of the output signals of the plurality of switch mode amplifiers and a voltage-current conversion unit that converts output signals of the switch mode amplifiers from voltage into current to perform signal synthesizing.Type: ApplicationFiled: September 12, 2013Publication date: August 6, 2015Applicant: NEC CORPORATIONInventors: Keiichi Motoi, Shinichi Hori, Kazumi Shiikuma
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Patent number: 9036691Abstract: An RF signal generating circuit that generates, from a digital signal, an RF pulse signal to be radio-transmitted. It includes a polar converter generating an amplitude signal and a phase signal from the digital signal; a signal decomposer receiving the amplitude signal as an input signal, and generates two signals, a pulse width control signal and a residual signal; a delta sigma modulator subjecting the residual signal to delta-sigma modulation; a pulse width modulator subjecting the phase signal to pulse modulation in accordance with the pulse width control signal, and outputting a pulse phase signal; and a mixer that mixes a signal output from the delta sigma modulator and the pulse phase signal to output the RF pulse signal. The signal decomposer generates the pulse width control and residual signals if a product of a fundamental wave component of the pulse phase and residual signals equals the amplitude signal.Type: GrantFiled: August 21, 2012Date of Patent: May 19, 2015Assignee: NEC CORPORATIONInventor: Shinichi Hori
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Publication number: 20150084691Abstract: The present invention is applied to a switching amplifier that includes a first high-side gate and a first low-side gate having output terminals connected together, and a high-side driver and a low-side driver that drive the first high-side gate and the first low-side gate, respectively. In the switching amplifier of the present invention, the high-side driver includes an input switching amplifier that uses the output terminal of the first high-side gate as a power source.Type: ApplicationFiled: April 5, 2013Publication date: March 26, 2015Applicant: NEC CORPORATIONInventor: Shinichi Hori
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Patent number: 8981851Abstract: A power amplifier amplifies a radio signal. Negative feedback is applied to a linear amplifier and the linear amplifier receives an envelope signal. A pulse current modulator is connected to a power supply terminal of a power amplifier and an output terminal of the linear amplifier via an inductor, and outputs a pulse current according to a control signal generated from the envelope signal. A diode has an anode connected to an output terminal of a direct current source and a cathode connected to an output terminal of the pulse current modulator. A switching element is disposed between the output terminal of the direct current source and a ground potential, and is controlled by the control signal.Type: GrantFiled: April 26, 2011Date of Patent: March 17, 2015Assignee: NEC CorporationInventor: Shinichi Hori
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Patent number: 8965072Abstract: A storage unit stores data of a plurality of previous images of a plurality of regions generated during a previous catheter procedure. A route map generating unit arranges a plurality of first catheter images or blood vessel images included in the plurality of previous images according to the positional relationship between the plurality of regions to generate a route map indicating the distribution of the plurality of first catheter images or blood vessel images. A specifying unit specifies a specific portion of a second catheter image included in a current image generated during a current catheter procedure. A calculating unit calculates the position of the specified specific portion on the route map on the basis of the positional relationship between the current image and the previous image. A display unit displays a specific previous image corresponding to the calculated position.Type: GrantFiled: January 27, 2009Date of Patent: February 24, 2015Assignee: Toshiba Medical Systems CorporationInventors: Kouki Fujii, Masakazu Osada, Kenichi Niwa, Shinichi Hori, Yoshiaki Nakagawa
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Patent number: 8964860Abstract: To provide a digital modulator including: a signal adjuster (105) which is provided with a plurality of output lines, and which outputs, to the output line, which corresponds to a range to which a level of an input signal belongs, a signal of a level corresponding to the level of the input signal; a plurality of internal digital modulators (111-1 to 111-N), each of which is provided so as to correspond to each of the plurality of output lines and carries out delta-sigma modulation on the signal of the corresponding output line to output the modulated signal; and an encoder (113) which encodes the plurality of modulated signals respectively outputted by the plurality of internal digital modulators.Type: GrantFiled: March 13, 2012Date of Patent: February 24, 2015Assignee: NEC CorporationInventor: Shinichi Hori
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Publication number: 20150049842Abstract: A transmitter according to the present invention includes a level detector that detects the level value of an input signal, from among a predetermined number of level values; an upstream-side signal adjusting unit that amplifies said input signal and shifts said input signal for an offset amount based on an output signal of said level detector; a digital-sigma modulator having a quantizer that quantizes an output signal of said upstream-side signal adjusting unit with a predetermined number of bits, and a downstream-side signal adjusting unit that amplifies an output signal of said delta-sigma modulator and shifts the output signal of said delta-sigma modulator for an offset amount based on the output signal of said level detector.Type: ApplicationFiled: February 19, 2013Publication date: February 19, 2015Applicant: NEC CORPORATIONInventor: Shinichi Hori
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Patent number: 8923436Abstract: An RF signal generator divides an input radio signal into an amplitude signal and a phase signal and outputs the amplitude signal and the phase signal. A switching amplifier amplifies the radio signal with the amplitude signal and the phase signal. The switching amplifier includes at least one variable current source that is controlled by the amplitude signal and supplies a current to the switching amplifier. The switching amplifier includes at least one switching elements that connects the variable current source to one of a terminal connected a ground potential and an output terminal of the switching amplifier according to the phase signal.Type: GrantFiled: April 26, 2011Date of Patent: December 30, 2014Assignee: Nec CorporationInventor: Shinichi Hori
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Patent number: 8873611Abstract: In order to improve radio characteristic in a transmitter, there are included a ?? modulation means that ?? modulates a given input signal; and a control means that changes parameters of the ?? modulation means in accordance with a given condition.Type: GrantFiled: September 2, 2011Date of Patent: October 28, 2014Assignee: NEC CorporationInventors: Shinichi Hori, Toshio Hayashi, Daisuke Nagai
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Publication number: 20140219384Abstract: To provide a digital modulator including: a signal adjuster (105) which is provided with a plurality of output lines, and which outputs, to the output line, which corresponds to a range to which a level of an input signal belongs, a signal of a level corresponding to the level of the input signal; a plurality of internal digital modulators (111-1 to 111-N), each of which is provided so as to correspond to each of the plurality of output lines and carries out delta-sigma modulation on the signal of the corresponding output line to output the modulated signal; and an encoder (113) which encodes the plurality of modulated signals respectively outputted by the plurality of internal digital modulators.Type: ApplicationFiled: March 13, 2012Publication date: August 7, 2014Applicant: NEC CORPORATIONInventor: Shinichi Hori
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Publication number: 20140205041Abstract: An RF signal generating circuit that generates, from a digital signal, an RF pulse signal to be radio-transmitted. It includes a polar converter generating an amplitude signal and a phase signal from the digital signal; a signal decomposer receiving the amplitude signal as an input signal, and generates two signals, a pulse width control signal and a residual signal; a delta sigma modulator subjecting the residual signal to delta-sigma modulation; a pulse width modulator subjecting the phase signal to pulse modulation in accordance with the pulse width control signal, and outputting a pulse phase signal; and a mixer that mixes a signal output from the delta sigma modulator and the pulse phase signal to output the RF pulse signal. The signal decomposer generates the pulse width control and residual signals if a product of a fundamental wave component of the pulse phase and residual signals equals the amplitude signal.Type: ApplicationFiled: August 21, 2012Publication date: July 24, 2014Applicant: NEC CorporationInventor: Shinichi Hori
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Patent number: 8736360Abstract: Output conductance of a differential current output type circuit constituting a filter body (1) and having a variable negative resistor connected between differential output lines is automatically regulated. The output conductance automatic regulation circuit comprises a differential voltage/current conversion circuit (2) which is a replica of a differential voltage/current conversion circuit constituting the filter body (1), a variable negative resistor (3) connected between the differential output lines of the differential voltage/current conversion circuit (2), a detector (4) for detecting the DC potential difference between the differential output lines of the differential voltage/current conversion circuit (2), and a controller (5) for controlling the differential voltage/current conversion circuit (2) and the conductance of a variable negative resistor connected with the differential voltage/current conversion circuit constituting the filter body (1) based on the detection results from the detector (4).Type: GrantFiled: March 22, 2007Date of Patent: May 27, 2014Assignee: Nec CorporationInventors: Shinichi Hori, Noriaki Matsuno
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Patent number: 8693578Abstract: A transmission device includes a pulse modulated signal generator that generates a pulse-modulated signal by changing the width of a pulse or the density of a pulse according to the magnitude of the amplitude component of an input signal while discretely changing the pulse height according to the magnitude of the amplitude, a modulated-signal generator that generates a modulated signal by integrating the pulse-modulated signal and the phase component of the input signal, a power amplifier that includes at least as many amplifiers as the number of the discrete amplitude levels of the modulated signal, changes the number of amplifies that amplify the modulated signal on the basis of the value of the amplitude level of the modulated signal, combines outputs of the amplifiers, and outputs a combined output, and an output filter that eliminates a square-wave component from the output of the power amplifier.Type: GrantFiled: December 1, 2010Date of Patent: April 8, 2014Assignee: NEC CorporationInventors: Kazuaki Kunihiro, Shinichi Hori, Kazumi Shiikuma
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Patent number: 8651822Abstract: A wind turbine rotor blade including outer skin materials made of fiber-reinforced plastic, a crossbeam material, and a trailing edge sandwich material disposed closer to a trailing edge than a trailing edge end of the crossbeam material, wherein a reinforcing material is provided on an inner surface of the outer skin material on a front side located closer to the trailing edge than a trailing edge end of the trailing edge sandwich material.Type: GrantFiled: March 24, 2011Date of Patent: February 18, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kouji Esaki, Shinichi Hori
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Publication number: 20130342185Abstract: In order to improve power efficiency, a power supplying apparatus includes a switching amplification unit supplying a first load with most of electric power, and a linear amplification unit correcting an output voltage applied to the first load according to an input signal. Furthermore, an electric current which flows into the linear amplification unit at the time of the correcting is supplied to a second load from a power supply terminal of the linear amplification unit.Type: ApplicationFiled: February 28, 2012Publication date: December 26, 2013Applicant: NEC CORPORATIONInventors: Kazuaki Kunihiro, Shinichi Hori, Masaaki Tanio
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Publication number: 20130177062Abstract: In order to improve radio characteristic in a transmitter, there are included a ?? modulation means that ?? modulates a given input signal; and a control means that changes parameters of the ?? modulation means in accordance with a given condition.Type: ApplicationFiled: September 2, 2011Publication date: July 11, 2013Applicant: NEC CORPORATIONInventors: Shinichi Hori, Toshio Hayashi, Daisuke Nagai
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Patent number: 8480371Abstract: A wind turbine rotor blade having an outer skin material made of fiber-reinforced plastic, a sheer web, and a trailing edge reinforcing material made of fiber-reinforced plastic which forms a trailing edge, wherein the trailing edge reinforcing material includes a first recess in which a trailing edge side end of the outer skin material is accommodated, and a second recess in which a trailing edge side of an overlay is accommodated, a third recess in which a leading edge side of the overlay is accommodated is formed in a trailing edge side tip end of the outer skin material, and the tip end of the outer skin material is fixed to the first recess through an adhesive.Type: GrantFiled: March 25, 2011Date of Patent: July 9, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kouji Esaki, Shinichi Hori
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Publication number: 20130142283Abstract: An RF signal generator divides an input radio signal into an amplitude signal and a phase signal and outputs the amplitude signal and the phase signal. A switching amplifier amplifies the radio signal with the amplitude signal and the phase signal. The switching amplifier includes at least one variable current sources that is controlled by the amplitude signal and supplies a current to the switching amplifier. The switching amplifier includes at least one switching elements that connects the variable current sources to one of a terminal connected a ground potential and an output terminal of the switching amplifier according to the phase signal.Type: ApplicationFiled: April 26, 2011Publication date: June 6, 2013Applicant: NEC CORPORATIONInventor: Shinichi Hori
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Publication number: 20130127556Abstract: A power amplifier amplifies a radio signal. Negative feedback is applied to a linear amplifier and the linear amplifier receives an envelope signal. A pulse current modulator is connected to a power supply terminal of a power amplifier and an output terminal of the linear amplifier via an inductor, and outputs a pulse current according to a control signal generated from the envelope signal. A diode has an anode connected to an output terminal of a direct current source and a cathode connected to an output terminal of the pulse current modulator. A switching element is disposed between the output terminal of the direct current source and a ground potential, and is controlled by the control signal.Type: ApplicationFiled: April 26, 2011Publication date: May 23, 2013Applicant: NEC CorporationInventor: Shinichi Hori
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Patent number: 8376713Abstract: Provided is a wind turbine rotor blade that can secure a sufficient strength in a coupling portion without significant increase in weight even though a blade is increased in size because beams, which are main strength members of the separated blades, are coupled to each other by metallic coupling members.Type: GrantFiled: August 12, 2011Date of Patent: February 19, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Nozomu Kawasetsu, Kentaro Shindo, Takao Kuroiwa, Shinichi Hori