Patents by Inventor Yoshimi Iso
Yoshimi Iso 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: 9337858Abstract: The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error.Type: GrantFiled: June 22, 2015Date of Patent: May 10, 2016Assignee: Renesas Electronics CorporationInventors: Kakeru Kimura, Yoshimi Iso, Masakazu Okamura, Masashi Nishimoto
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Publication number: 20150288377Abstract: The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error.Type: ApplicationFiled: June 22, 2015Publication date: October 8, 2015Inventors: Kakeru Kimura, Yoshimi Iso, Masakazu Okamura, Masashi Nishimoto
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Patent number: 9153271Abstract: The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control.Type: GrantFiled: June 6, 2014Date of Patent: October 6, 2015Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Yoshimi Iso, Mitsuo Hagiwara, Mitsuyuki Kimura
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Patent number: 9065467Abstract: The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error.Type: GrantFiled: August 13, 2014Date of Patent: June 23, 2015Assignee: Renesas Electronics CorporationInventors: Kakeru Kimura, Yoshimi Iso, Masakazu Okamura, Masashi Nishimoto
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Patent number: 8981975Abstract: In AD conversion of a voltage, data continuity is ensured between the results of conversion after amplification and of direct conversion without amplification. In AD conversion operation, an analog signal output from a DA converter circuit is directly converted by an AD converter circuit, and the analog signal is converted after amplification with an expected gain of 2?. Based on resultant data, a gain of an amplifier circuit and an offset thereof are calculated. An analog signal to be enhanced in bit precision is amplified by the amplifier circuit and converted by the AD converter circuit, the offset is subtracted from the resultant conversion, and the result is multiplied by a ratio of the expected gain to the calculated gain to cancel gain error. Based on data with gain error canceled, acquisition of bit-extended conversion result data is performed to ensure continuity between data having different degrees of bit precision.Type: GrantFiled: December 3, 2013Date of Patent: March 17, 2015Assignee: Renesas Electronics CorporationInventors: Yoshimi Iso, Kakeru Kimura, Tadashi Matsushima, Yuji Shimizu
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Publication number: 20140347199Abstract: The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error.Type: ApplicationFiled: August 13, 2014Publication date: November 27, 2014Inventors: Kakeru Kimura, Yoshimi Iso, Masakazu Okamura, Masashi Nishimoto
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Patent number: 8860593Abstract: The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error.Type: GrantFiled: April 10, 2012Date of Patent: October 14, 2014Assignee: Renesas Electric CorporationInventors: Kakeru Kimura, Yoshimi Iso, Masakazu Okamura, Masashi Nishimoto
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Publication number: 20140286148Abstract: The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control.Type: ApplicationFiled: June 6, 2014Publication date: September 25, 2014Inventors: Yoshimi ISO, Mitsuo HAGIWARA, Mitsuyuki KIMURA
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Patent number: 8780680Abstract: The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control.Type: GrantFiled: June 30, 2011Date of Patent: July 15, 2014Assignee: Renesas Electronics CorporationInventors: Yoshimi Iso, Mitsuo Hagiwara, Mitsuyuki Kimura
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Publication number: 20140055291Abstract: The present invention provides a data processing system which can increase resolution and which has excellent tracking with respect to the switching of a conversion range and is small in conversion error.Type: ApplicationFiled: April 10, 2012Publication date: February 27, 2014Inventors: Kakeru Kimura, Yoshimi Iso, Masakazu Okamura, Masashi Nishimoto
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Patent number: 8614636Abstract: In AD conversion of a voltage, data continuity is ensured between the results of conversion after amplification and of direct conversion without amplification. In AD conversion operation, an analog signal output from a DA converter circuit is directly converted by an AD converter circuit, and the analog signal is converted after amplification with an expected gain of 2n. Based on resultant data, a gain of an amplifier circuit and an offset thereof are calculated. An analog signal to be enhanced in bit precision is amplified by the amplifier circuit and converted by the AD converter circuit, the offset is subtracted from the resultant conversion, and the result is multiplied by a ratio of the expected gain to the calculated gain to cancel gain error. Based on data with gain error canceled, acquisition of bit-extended conversion result data is performed to ensure continuity between data having different degrees of bit precision.Type: GrantFiled: October 21, 2011Date of Patent: December 24, 2013Assignee: Renesas Electronics CorporationInventors: Yoshimi Iso, Kakeru Kimura, Tadashi Matsushima, Yuji Shimizu
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Patent number: 8471737Abstract: DA conversion is performed while improving resolution and reducing the influence of errors. A predetermined weight is applied to an output of at least one of a plurality of DA converters to each of which calibration data is given; the resultant outputs are added by an adder. An output of the adder is converted to a digital value by an AD converter. If the predetermined weight has an error outside an allowable range on the basis of the obtained digital value, a calibrating process of obtaining a correction factor for correcting the digital signal to be converted so as to reduce influence of the error is controlled. When a digital signal is to be converted to an analog signal with high precision, the digital signal is corrected with the correction factor, the resultant value is supplied to the DA converters, and DA converted outputs are added by the adder.Type: GrantFiled: July 11, 2012Date of Patent: June 25, 2013Assignee: Renesas Electronics CorporationInventors: Yoshimi Iso, Akane Hiroshima, Toshiya Tamaki, Masashi Nishimoto
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Publication number: 20130015989Abstract: DA conversion is performed while improving resolution and reducing the influence of errors. A predetermined weight is applied to an output of at least one of a plurality of DA converters to each of which calibration data is given; the resultant outputs are added by an adder. An output of the adder is converted to a digital value by an AD converter. If the predetermined weight has an error outside an allowable range on the basis of the obtained digital value, a calibrating process of obtaining a correction factor for correcting the digital signal to be converted so as to reduce influence of the error is controlled. When a digital signal is to be converted to an analog signal with high precision, the digital signal is corrected with the correction factor, the resultant value is supplied to the DA converters, and DA converted outputs are added by the adder.Type: ApplicationFiled: July 11, 2012Publication date: January 17, 2013Applicant: Renesas Electronics CorporationInventors: Yoshimi Iso, Akane Hiroshima, Toshiya Tamaki, Masashi Nishimoto
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Publication number: 20120062403Abstract: In AD conversion of a voltage, data continuity is ensured between the results of conversion after amplification and of direct conversion without amplification. In AD conversion operation, an analog signal output from a DA converter circuit is directly converted by an AD converter circuit, and the analog signal is converted after amplification with an expected gain of 2n. Based on resultant data, a gain of an amplifier circuit and an offset thereof are calculated. An analog signal to be enhanced in bit precision is amplified by the amplifier circuit and converted by the AD converter circuit, the offset is subtracted from the resultant conversion, and the result is multiplied by a ratio of the expected gain to the calculated gain to cancel gain error. Based on data with gain error canceled, acquisition of bit-extended conversion result data is performed to ensure continuity between data having different degrees of bit precision.Type: ApplicationFiled: October 21, 2011Publication date: March 15, 2012Inventors: Yoshimi ISO, Kakeru Kimura, Tadashi Matsushima, Yuji Shimizu
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Patent number: 8077065Abstract: In AD conversion of a voltage under measurement, data continuity is ensured between the result of conversion after amplification by using an amplifier circuit and the result of direct conversion without using the amplifier circuit. In AD conversion operation using a DA converter circuit, an amplifier circuit, and an AD converter circuit under the direction of a control circuit, an analog signal output from the DA converter circuit is directly converted by the AD converter circuit, and also the analog signal is converted therein after amplified by the amplifier circuit with an expected gain of 2n (ānā represents a positive integer). Based on resultant data thus obtained, a gain of the amplifier circuit and an offset thereof are calculated.Type: GrantFiled: March 24, 2010Date of Patent: December 13, 2011Assignee: Renesas Electronics CorporationInventors: Yoshimi Iso, Kakeru Kimura, Tadashi Matsushima, Yuji Shimizu
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Publication number: 20110255386Abstract: The optical disc device has a circuit which forms a focus error signal for focus servo control based on reflection light from an optical disc exposed to laser light. Also, the device has a data processing unit which can control by feedback a position to which an objective lens is moved by a focusing actuator based on a focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit for the focusing actuator is switched to a smaller one in comparison to that in feedback control.Type: ApplicationFiled: June 30, 2011Publication date: October 20, 2011Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Yoshimi ISO, Mitsuo HAGIWARA, Mitsuyuki KIMURA
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Patent number: 7995431Abstract: The optical disc device has a circuit 4 which forms a focus error signal FER for focus servo control based on reflection light from an optical disc exposed to laser light. A data processing unit 2 can control by feedback a position to which an objective lens is moved by a focusing actuator 30 based on the focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit 40 for the focusing actuator is switched to a smaller one in comparison to that in feedback control.Type: GrantFiled: May 23, 2005Date of Patent: August 9, 2011Assignee: Renesas Electronics CorporationInventors: Yoshimi Iso, Mitsuo Hagiwara, Mitsuyuki Kimura
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Publication number: 20100283759Abstract: Detecting a touch on a touch sensor is performed using a microcomputer without requiring a large-resistance resistor. A capacitive electrode of the touch sensor is coupled to an external terminal of the microcomputer. The microcomputer comprises a current source circuit (e.g., constant current circuit) and an interface section which are coupled to the external terminal, a counter circuit coupled to the interface section, and a central processing unit (CPU). The CPU, after initializing accumulated charge on the touch sensor by an output circuit of the interface section, integrates charge onto the touch sensor with an output current of the current source circuit, acquires a time interval counted by the counter circuit until a signal obtained from an input circuit of the interface section inverts, and discerns whether or not the touch sensor has been touched, depending on the time count value.Type: ApplicationFiled: May 5, 2010Publication date: November 11, 2010Inventors: Yoshimi ISO, Minoru Kishi, Yukihisa Naoe
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Publication number: 20100245140Abstract: In AD conversion of a voltage under measurement, data continuity is ensured between the result of conversion after amplification by using an amplifier circuit and the result of direct conversion without using the amplifier circuit. In AD conversion operation using a DA converter circuit, an amplifier circuit, and an AD converter circuit under the direction of a control circuit, an analog signal output from the DA converter circuit is directly converted by the AD converter circuit, and also the analog signal is converted therein after amplified by the amplifier circuit with an expected gain of 2n (ānā represents a positive integer). Based on resultant data thus obtained, a gain of the amplifier circuit and an offset thereof are calculated.Type: ApplicationFiled: March 24, 2010Publication date: September 30, 2010Inventors: Yoshimi ISO, Kakeru Kimura, Tadashi Matsushima, Yuji Shimizu
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Publication number: 20090213705Abstract: The optical disc device has a circuit 4 which forms a focus error signal FER for focus servo control based on reflection light from an optical disc exposed to laser light. A data processing unit 2 can control by feedback a position to which an objective lens is moved by a focusing actuator 30 based on the focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit 40 for the focusing actuator is switched to a smaller one in comparison to that in feedback control.Type: ApplicationFiled: May 23, 2005Publication date: August 27, 2009Inventors: Yoshimi Iso, Mitsuo Hagiwara, Mitsuyuki Kimura