Patents by Inventor Mamoru Tamba
Mamoru Tamba 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: 10248606Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.Type: GrantFiled: August 7, 2018Date of Patent: April 2, 2019Assignee: YOKOGAWA ELECTRIC CORPORATIONInventors: Kazunori Tanimura, Ikutomo Watanabe, Mamoru Tamba, Nobuaki Ema, Takaaki Matsuda
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Publication number: 20180341609Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.Type: ApplicationFiled: August 7, 2018Publication date: November 29, 2018Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Kazunori Tanimura, Ikutomo Watanabe, Mamoru Tamba, Nobuaki Ema, Takaaki Matsuda
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Patent number: 10083143Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.Type: GrantFiled: October 28, 2014Date of Patent: September 25, 2018Assignee: YOKOGAWA ELECTRIC CORPORATIONInventors: Kazunori Tanimura, Ikutomo Watanabe, Mamoru Tamba, Nobuaki Ema, Takaaki Matsuda
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Patent number: 9385702Abstract: An input/output (I/O) module is configured to connect a controller and a field device. The I/O module includes a PWM (pulse width modulation) demodulator configured to demodulate a PWM signal that is input from the controller, a current source configured to output a current based on an output signal of the PWM demodulator to the field device, a resistance connected in line with the current source, and a feedback circuit configured to feed back an output current of the current source to the PWM demodulator via the controller.Type: GrantFiled: November 10, 2015Date of Patent: July 5, 2016Assignee: YOKOGAWA ELECTRIC CORPORATIONInventors: Shunsuke Hayashi, Mamoru Tamba, Takeshi Arimizu
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Publication number: 20160134269Abstract: An input/output (I/O) module is configured to connect a controller and a field device. The I/O module includes a PWM (pulse width modulation) demodulator configured to demodulate a PWM signal that is input from the controller, a current source configured to output a current based on an output signal of the PWM demodulator to the field device, a resistance connected in line with the current source, and a feedback circuit configured to feed back an output current of the current source to the PWM demodulator via the controller.Type: ApplicationFiled: November 10, 2015Publication date: May 12, 2016Applicant: Yokogawa Electric CorporationInventors: Shunsuke HAYASHI, Mamoru TAMBA, Takeshi ARIMIZU
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Publication number: 20150120972Abstract: An I/O module includes a base plate, a plurality of universal-circuits, and an option-module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal-circuits correspond to the connection terminals. The universal-circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option-module is detachably provided in the base plate. The option-module is provided between a first connection terminal of the connection terminals and a first universal-circuit of the universal-circuits. The option-module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal-circuit.Type: ApplicationFiled: October 28, 2014Publication date: April 30, 2015Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Kazunori Tanimura, Ikutomo Watanabe, Mamoru Tamba, Nobuaki Ema, Takaaki Matsuda
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Patent number: 7719451Abstract: In order to provide a signal measuring apparatus which satisfies multiple performances at a high level all together, the signal measuring apparatus includes: DC performance; noise performance; distortion performance; spurious performance; and the like, a signal measuring apparatus includes: multiple A/D converters which respectively have different conversion characteristics for converting from an analog signal outputted from a DUT to digital signals; digital circuits which are provided in correspondence with the A/D converters and which conduct predetermined operations based on the conversion characteristics of the A/D converters.Type: GrantFiled: November 6, 2007Date of Patent: May 18, 2010Assignee: Yokogawa Electric CorporationInventor: Mamoru Tamba
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Patent number: 7629809Abstract: An object of the invention is to implement an IC tester wherein an analog test module can be provided at a test head while maintaining flexibility of the test head. The IC tester comprises an analog test module for testing an analog signal against the device under test. The analog test module comprises a main substrate, connected to the device under test, a first sub-substrate connected to the main substrate, the first sub-substrate comprising first analog circuits and first digital circuits electrically connected to the first analog circuits, wherein an analog test is conducted by the first analog circuits, and the first digital circuits, and a second sub-substrate connected to the main substrate, the second sub-substrate comprising second analog circuits and second digital circuits electrically connected to the second analog circuits, wherein an analog test is conducted by the second analog circuits, and the second digital circuits.Type: GrantFiled: October 21, 2008Date of Patent: December 8, 2009Assignee: Yokogawa Electric CorporationInventor: Mamoru Tamba
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Publication number: 20090134891Abstract: An object of the invention is to implement an IC tester wherein an analog test module can be provided at a test head while maintaining flexibility of the test head. The IC tester comprises an analog test module for testing an analog signal against the device under test. The analog test module comprises a main substrate, connected to the device under test, a first sub-substrate connected to the main substrate, the first sub-substrate comprising first analog circuits and first digital circuits electrically connected to the first analog circuits, wherein an analog test is conducted by the first analog circuits, and the first digital circuits, and a second sub-substrate connected to the main substrate, the second sub-substrate comprising second analog circuits and second digital circuits electrically connected to the second analog circuits, wherein an analog test is conducted by the second analog circuits, and the second digital circuits.Type: ApplicationFiled: October 21, 2008Publication date: May 28, 2009Applicant: YOKOGAWA ELECTRIC CORPORATIONInventor: Mamoru TAMBA
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Publication number: 20080109179Abstract: In order to provide a signal measuring apparatus which satisfies multiple performances at a high level all together, the signal measuring apparatus includes: DC performance; noise performance; distortion performance; spurious performance; and the like, a signal measuring apparatus includes: multiple A/D converters which respectively have different conversion characteristics for converting from an analog signal outputted from a DUT to digital signals; digital circuits which are provided in correspondence with the A/D converters and which conduct predetermined operations based on the conversion characteristics of the A/D converters.Type: ApplicationFiled: November 6, 2007Publication date: May 8, 2008Applicant: YOKOGAWA ELECTRIC CORPORATIONInventor: Mamoru TAMBA
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Patent number: 7327301Abstract: A single end to differential signal converter comprising a low-frequency transmission step, which mixes the direct current and low-frequency components of single-ended signals with in-phase voltage signals to generate low-frequency signals, and a high-frequency transmission step, which mixes the high-frequency component of these single-ended signals and these low-frequency transmission signals to generate differential signals.Type: GrantFiled: March 25, 2004Date of Patent: February 5, 2008Assignee: Agilent Technologies, Inc.Inventor: Mamoru Tamba
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Patent number: 7161514Abstract: A method and low cost apparatus to accurately determine the gain, offset, and/or skew calibration values of each A/D converter in a few steps for an interleaving A/D converter. The calibration method includes: applying sine waves to the input as a calibration signal during calibration, A/D converting of the sine wave by a plurality of A/D conversion means in a predetermined order and storing the converted data in a data storage memory, and determining the gain, offset, and/or skew calibration values by using sine curve fitting on a sequence of converted data for each of the plurality of A/D conversion means.Type: GrantFiled: October 24, 2002Date of Patent: January 9, 2007Assignee: Agilent Technologies, Inc.Inventor: Mamoru Tamba
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Publication number: 20040201510Abstract: A single end to differential signal converter comprising a low-frequency transmission step, which mixes the direct current and low-frequency components of single-ended signals with in-phase voltage signals to generate low-frequency signals, and a high-frequency transmission step, which mixes the high-frequency component of these single-ended signals and these low-frequency transmission signals to generate differential signals.Type: ApplicationFiled: March 25, 2004Publication date: October 14, 2004Applicant: AGILENT TECHNOLOGIES, INC.Inventor: Mamoru Tamba
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Publication number: 20030080885Abstract: A method and low cost apparatus to accurately determine the gain, offset, and/or skew calibration values of each A/D converter in a few steps for an interleaving A/D converter. The calibration method includes: applying sine waves to the input as a calibration signal during calibration, A/D converting of the sine wave by a plurality of A/D conversion means in a predetermined order and storing the converted data in a data storage memory, and determining the gain, offset, and/or skew calibration values by using sine curve fitting on a sequence of converted data for each of the plurality of A/D conversion means.Type: ApplicationFiled: October 24, 2002Publication date: May 1, 2003Applicant: Agilent Technologies, Inc.Inventor: Mamoru Tamba
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Publication number: 20010052864Abstract: In order to prevent spurious signals from being generated in an electronic circuit executing an interleaving operation, a plurality of substantially similar electronic circuits 101, 102, 103 are arranged in parallel and operated in an interleaved manner. When each operating frequency of the electronic circuit is f, in order to obtain a Nf frequency (N is 2 in FIG. 1), more than N pieces (3 in FIG. 1) of electronic circuits are arranged in parallel and used, and electronic circuits 101, 102, 103 are selected for output in an at least pseudo-random manner.Type: ApplicationFiled: April 25, 2001Publication date: December 20, 2001Inventors: Atsushi Shimizu, Takanori Komuro, Mamoru Tamba, Hideharu Munakata