Patents by Inventor Yosuke Mitani
Yosuke Mitani 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: 20120262320Abstract: Two T filters, one of which includes two resistive elements and one capacitive element and the other of which includes two capacitive elements and one resistive element, are inserted in a negative-feedback section of an operational amplifier, and a resistive element and a capacitive element are connected between each of intermediate nodes and a signal input terminal. A resistive element and a capacitive element which are connected to each other in parallel are connected between the signal input terminal and an inverting input terminal of the operational amplifier. With this configuration, overall admittances where elements connected to the corresponding intermediate nodes are in parallel connection are equal to each other.Type: ApplicationFiled: June 27, 2012Publication date: October 18, 2012Applicant: Panasonic CorporationInventors: Yosuke Mitani, Kazuo Matsukawa, Masao Takayama, Koji Obata, Shiro Dosho
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Patent number: 8258990Abstract: An integrator includes an operational amplifier, a first filter connected to an inverting input terminal of the operational amplifier, and a second filter connected between the inverting input terminal and an output terminal of the operational amplifier. The first filter includes n resistive elements connected in series, and (n?1) capacitive elements each having one end connected to an interconnecting node of the resistive elements and the other end connected to ground. The second filter includes n capacitive elements connected in series, and (n?1) resistive elements each having one end connected to an interconnecting node of the capacitive elements and the other end connected to ground.Type: GrantFiled: September 22, 2010Date of Patent: September 4, 2012Assignee: Panasonic CorporationInventors: Shiro Dosho, Takashi Morie, Kazuo Matsukawa, Yosuke Mitani, Masao Takayama
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Publication number: 20110254718Abstract: An integrator is provided which can reduce a disturbance in the current waveform of a current DA converter in order to improve the SNR of a ?? modulator, for example. The integrator includes an operational amplifier, and feedback paths provided in parallel between the output terminal and inverting input terminal of the operational amplifier. In one of the feedback paths, an integrating capacitor and at least one resistor are connected in series. In the other feedback path, a second integrating capacitor whose capacitance value is smaller than that of the integrating capacitor is provided.Type: ApplicationFiled: June 22, 2011Publication date: October 20, 2011Applicant: PANASONIC CORPORATIONInventors: Kazuo MATSUKAWA, Shiro DOSHO, Yosuke MITANI, Koji OBATA
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Publication number: 20110200077Abstract: In a DSM including a loop in which an output signal of a quantizer is digitally processed, and fed back through a DAC to an analog filter, the quantizer quantizes an analog signal from an analog filter section to output a digital signal. The digital signal from the quantizer is digitally processed in a first-order recursive filter circuit including a variable gain amplifier and a delay element. A LUT receives both the digital signal from the quantizer and a table control signal, which is an output signal from the recursive filter circuit, and stores in advance compensation values corresponding to the both signals. A compensation value from the LUT is used to provide a digital output signal compensated for a delay. The digital output signal is converted into an analog signal in the DAC, and then subtracted from an analog input signal in the analog filter section.Type: ApplicationFiled: April 26, 2011Publication date: August 18, 2011Applicant: PANASONIC CORPORATIONInventors: Yosuke MITANI, Kazuo Matsukawa, Masao Takayama, Shiro Dosho
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Publication number: 20110169677Abstract: Two resistive elements and a capacitive element are coupled between a first node and each of an inverting input terminal of an operational amplifier, an output terminal of the operational amplifier, and a common node. A resistive element and a capacitive element are coupled between the first node and a signal input terminal. Two capacitive elements and a resistive element are coupled between a second node and each of the inverting input terminal, the output terminal, and the common node. Two capacitive elements are coupled between the second node and each of the signal input terminal, and the common node.Type: ApplicationFiled: March 28, 2011Publication date: July 14, 2011Applicant: PANASONIC CORPORATIONInventors: Shiro DOSHO, Kazuo Matsukawa, Yosuke Mitani
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Patent number: 7979038Abstract: Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band.Type: GrantFiled: January 16, 2007Date of Patent: July 12, 2011Assignee: Panasonic CorporationInventors: Yosuke Mitani, Shunsuke Hirano, Kaoru Ishida
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Publication number: 20110133964Abstract: An oversampling A/D converter includes a first filter including a first resistive element, a first capacitive element, a second resistive element, an operational amplifier, and a second capacitive element; a second filter receiving an output of the first filter; a third filter including a third resistive element, a third capacitive element, and a fourth resistive element; a quantizer receiving an output of the third filter and generating a digital signal; and a D/A converter converting the digital signal to an analog current signal. The D/A converter inputs the generated analog current signal to an inverting input terminal of the operational amplifier.Type: ApplicationFiled: February 11, 2011Publication date: June 9, 2011Applicant: Panasonic CorporationInventors: Shiro DOSHO, Kazuo Matsukawa, Masao Takayama, Yosuke Mitani
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Publication number: 20110050476Abstract: An integrator includes an operational amplifier, a first filter connected to an inverting input terminal of the operational amplifier, and a second filter connected between the inverting input terminal and an output terminal of the operational amplifier. The first filter includes n resistive elements connected in series, and (n?1) capacitive elements each having one end connected to an interconnecting node of the resistive elements and the other end connected to ground. The second filter includes n capacitive elements connected in series, and (n?1) resistive elements each having one end connected to an interconnecting node of the capacitive elements and the other end connected to ground.Type: ApplicationFiled: September 22, 2010Publication date: March 3, 2011Applicant: PANASONIC CORPORATIONInventors: Shiro Dosho, Takashi Morie, Kazuo Matsukawa, Yosuke Mitani, Masao Takayama
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Publication number: 20110018752Abstract: In a flash A/D converter, a predictor predicts next analog input data based on a digital output signal from an A/D converter, and outputs prediction data. Based on the prediction data from the predictor, a controller turns on comparators having reference voltages near the prediction data, and in order to ensure a certain degree of A/D conversion accuracy even when the prediction fails, also turns on even-numbered comparators 103.2a (where a is 0 to 7), for example. In this manner, even when prediction of next analog input data fails, a 4-bit A/D converter can perform A/D conversion with 3-bit accuracy, while saving power consumption by reducing the number of comparators to be turned on.Type: ApplicationFiled: October 6, 2010Publication date: January 27, 2011Applicant: Panasonic CorporationInventors: Masao TAKAYAMA, Kazuo Matsukawa, Yosuke Mitani, Shiro Dosho
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Publication number: 20100272222Abstract: Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band.Type: ApplicationFiled: January 16, 2007Publication date: October 28, 2010Applicant: PANASONIC CORPORATIONInventors: Yosuke Mitani, Shunsuke Hirano, Kaoru Ishida
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Patent number: 7498689Abstract: A power supply device for vehicles is disclosed, which device includes a backup unit to the power supply as an auxiliary power supply employing a capacitor unit formed of plural capacitors. The auxiliary power supply includes a power supply section allowing the capacitor unit to power an electronic controller, and a compulsory operating section for operating the power supply section. An operating status of the power supply section is monitored even when a battery operates normally, so that the power supply device for vehicles with higher reliability and improved safety is obtainable.Type: GrantFiled: June 24, 2004Date of Patent: March 3, 2009Assignee: Panasonic CorporationInventors: Yosuke Mitani, Toshihiko Ohashi
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Patent number: 7157985Abstract: First and second calibration signals (308, 309) are sent to a frequency divider (102) and an adder (116) of a PLL section (100A), demodulated in a demodulator (111), filtered through a low pass filter (113) and a high pass filter (114) and thereafter sent to a modulation signal control circuit (115). The modulation signal control circuit (115) generates control information (318) in comparison with the phase and amplitude of the first and second calibration signals (308 and 309) and sends the control information (318) to a modulation control signal generator (106). Modulation control signal generator (106) holds the control information (318) and controls the values of the first modulation signal and second modulation signal sent to the frequency divider (102) and adder (116) on the based on the control information (318) held in modulation operation.Type: GrantFiled: March 14, 2005Date of Patent: January 2, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yosuke Mitani, Shunsuke Hirano
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Publication number: 20050269170Abstract: A power supply device for vehicles is disclosed, which device includes a backup unit to the power supply as an auxiliary power supply employing a capacitor unit formed of plural capacitors. The auxiliary power supply includes a power supply section allowing the capacitor unit to power an electronic controller, and a compulsory operating section for operating the power supply section. An operating status of the power supply section is monitored even when a battery operates normally, so that the power supply device for vehicles with higher reliability and improved safety is obtainable.Type: ApplicationFiled: June 24, 2004Publication date: December 8, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yosuke Mitani, Toshihiko Ohashi
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Publication number: 20050242889Abstract: First and second calibration signals (308, 309) are sent to a frequency divider (102) and an adder (116) of a PLL section (100A), demodulated in a demodulator (111), filtered through a low pass filter (113) and a high pass filter (114) and thereafter sent to a modulation signal control circuit (115). The modulation signal control circuit (115) generates control information (318) in comparison with the phase and amplitude of the first and second calibration signals (308 and 309) and sends the control information (318) to a modulation control signal generator (106). Modulation control signal generator (106) holds the control information (318) and controls the values of the first modulation signal and second modulation signal sent to the frequency divider (102) and adder (116) on the based on the control information (318) held in modulation operation.Type: ApplicationFiled: March 14, 2005Publication date: November 3, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yosuke Mitani, Shunsuke Hirano