Patents by Inventor Mototsugu Hamada

Mototsugu Hamada 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).

  • Patent number: 8587384
    Abstract: A semiconductor integrated circuit device includes a DCO and a storing unit that stores a temperature coefficient of an oscillation frequency and an absolute value of the oscillation frequency, which should be set in the DCO, corresponding to potential obtained from a voltage source that changes with a monotonic characteristic with respect to temperature.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: November 19, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuji Satoh, Mototsugu Hamada, Daisuke Miyashita
  • Patent number: 8134404
    Abstract: A semiconductor device, has a main transistor that is a first-conductivity-type MOS transistor and has the drain connected to a first potential; a first switch circuit that is connected between the source of said main transistor and a second potential; a dummy transistor that is a first-conductivity-type MOS transistor whose source serves also as the source of said main transistor; and a second switch circuit that is connected between the drain of said dummy transistor and said first potential or said second potential.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: March 13, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mitsuyuki Ashida, Mototsugu Hamada
  • Publication number: 20120056682
    Abstract: A semiconductor integrated circuit device includes a DCO and a storing unit that stores a temperature coefficient of an oscillation frequency and an absolute value of the oscillation frequency, which should be set in the DCO, corresponding to potential obtained from a voltage source that changes with a monotonic characteristic with respect to temperature.
    Type: Application
    Filed: November 10, 2011
    Publication date: March 8, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuji SATOH, Mototsugu HAMADA, Daisuke MIYASHITA
  • Patent number: 8067962
    Abstract: A semiconductor integrated circuit device has a combinational logic circuit including one or plural logic cells connected in series. At least one of the logic cells includes a standard cell which includes a MIS transistor, an input terminal to which an output signal from a previous stage is inputted as an input signal, and an output terminal. A first conductivity-type first MIS transistor which is provided between the output terminal of the standard cell and a first power supply voltage, the first MIS transistor including a control terminal to which a circuit control signal is inputted, and the first MIS transistor supplying the first power supply voltage to the output terminal of the standard cell based on the circuit control signal in order to bring the standard cell into an operation-stopped state. A second conductivity-type second MIS transistor cuts off a leakage current of the MIS transistor in the standard cell.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: November 29, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mototsugu Hamada, Tsuyoshi Nishikawa, Toshiyuki Furusawa
  • Publication number: 20110181367
    Abstract: A semiconductor integrated circuit device includes a DCO and a storing unit that stores a temperature coefficient of an oscillation frequency and an absolute value of the oscillation frequency, which should be set in the DCO, corresponding to potential obtained from a voltage source that changes with a monotonic characteristic with respect to temperature.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 28, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuji SATOH, Mototsugu HAMADA, Daisuke MIYASHITA
  • Patent number: 7808017
    Abstract: A semiconductor integrated circuit having a first p-type MOS transistor; a first n-type MOS transistor; a second p-type MOS transistors; a and second n-type MOS transistors having fourth gate electrodes disposed so as to be adjacent to the second diffused regions of the first n-type MOS transistor. The semiconductor integrated circuit further having an absolute value of a threshold voltage of the second p-type MOS transistor being higher than an absolute value of a threshold voltage of the first p-type MOS transistor, and an absolute value of a threshold voltage of the second n-type MOS transistor being higher than an absolute value of a threshold voltage of the first n-type MOS transistor.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: October 5, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Mototsugu Hamada
  • Patent number: 7733145
    Abstract: A nonvolatile latch circuit includes: a first gate part controlling to load or intercept an input signal based on a gate signal; a first logic gate functioning as an inverter or a gate outputting a constant voltage in response to the first control signal; a second logic gate functioning as an inverter or a gate outputting the constant voltage in response to the first control signal; a second gate part controlling to load or intercept the output of the second logic gate based on an inverted signal of the gate signal and sends the output of the second logic gate to an first input terminal of the first logic gate; and first and second injection type MTJ elements provided between the driving power supply and the first and second logic gates and changing in resistance depending upon a current flow direction.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: June 8, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiko Abe, Takahiro Hirai, Shiho Nakamura, Hirofumi Morise, Mototsugu Hamada
  • Publication number: 20100133625
    Abstract: A semiconductor integrated circuit having a first p-type MOS transistor; a first n-type MOS transistor; a second p-type MOS transistors; a and second n-type MOS transistors having fourth gate electrodes disposed so as to be adjacent to the second diffused regions of the first n-type MOS transistor. The semiconductor integrated circuit further having an absolute value of a threshold voltage of the second p-type MOS transistor being higher than an absolute value of a threshold voltage of the first p-type MOS transistor, and an absolute value of a threshold voltage of the second n-type MOS transistor being higher than an absolute value of a threshold voltage of the first n-type MOS transistor.
    Type: Application
    Filed: February 1, 2010
    Publication date: June 3, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Mototsugu HAMADA
  • Publication number: 20100117161
    Abstract: A semiconductor device, has a main transistor that is a first-conductivity-type MOS transistor and has the drain connected to a first potential; a first switch circuit that is connected between the source of said main transistor and a second potential; a dummy transistor that is a first-conductivity-type MOS transistor whose source serves also as the source of said main transistor; and a second switch circuit that is connected between the drain of said dummy transistor and said first potential or said second potential.
    Type: Application
    Filed: January 22, 2010
    Publication date: May 13, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Mitsuyuki ASHIDA, Mototsugu Hamada
  • Publication number: 20100066419
    Abstract: A semiconductor integrated circuit device has a combinational logic circuit including one or plural logic cells connected in series. At least one of the logic cells includes a standard cell which includes a MIS transistor, an input terminal to which an output signal from a previous stage is inputted as an input signal, and an output terminal. A first conductivity-type first MIS transistor which is provided between the output terminal of the standard cell and a first power supply voltage, the first MIS transistor including a control terminal to which a circuit control signal is inputted, and the first MIS transistor supplying the first power supply voltage to the output terminal of the standard cell based on the circuit control signal in order to bring the standard cell into an operation-stopped state. A second conductivity-type second MIS transistor cuts off a leakage current of the MIS transistor in the standard cell.
    Type: Application
    Filed: September 4, 2009
    Publication date: March 18, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Mototsugu Hamada, Tsuyoshi Nishikawa, Toshiyuki Furusawa
  • Patent number: 7679106
    Abstract: A semiconductor integrated circuit having a substantially rectangular standard cell divided by first borderlines opposed to other standard cells longitudinally adjacent to the standard cell and second borderlines opposed to other standard cells laterally adjacent to the standard cell, the standard cell has: a p-type MOS transistor having first diffused regions and a first gate electrode; an n-type MOS transistor having second diffused regions and a second gate electrode with STI disposed for device isolation between the n-type MOS transistor and the p-type MOS transistor substantially in parallel with the first borderlines; dummy p-type MOS transistors having third gate electrodes disposed on the second borderlines so as to be adjacent to the first diffused regions of the p-type MOS transistor, the third gate electrodes being connected to power supply wiring so as to turn off the dummy p-type MOS transistors; and dummy n-type MOS transistors having fourth gate electrodes disposed on the second borderlines so
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: March 16, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Mototsugu Hamada
  • Patent number: 7675355
    Abstract: A semiconductor device, has a main transistor that is a first-conductivity-type MOS transistor and has the drain connected to a first potential; a first switch circuit that is connected between the source of said main transistor and a second potential; a dummy transistor that is a first-conductivity-type MOS transistor whose source serves also as the source of said main transistor; and a second switch circuit that is connected between the drain of said dummy transistor and said first potential or said second potential.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: March 9, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mitsuyuki Ashida, Mototsugu Hamada
  • Patent number: 7606096
    Abstract: A semiconductor integrated circuit device, has a first variable resistor element and a second variable resistor element whose resistances are changed complementarily depending on a current; and a current path switching circuit that supplies said current from a power supply by switching between current paths according to whether a normal operation mode or a read mode is input externally, wherein said power supply is turned off and then turned on again in said normal operation mode, and in this state, data corresponding to the relationship between the magnitudes of the resistances of said first variable resistor element and said second variable resistor element is read in said read mode.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: October 20, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mototsugu Hamada, TakahirO Hirai, Shiho Nakamura, Hirofumi Morise, Keiko Abe
  • Patent number: 7602211
    Abstract: A semiconductor integrated circuit device has a combinational logic circuit including one or plural logic cells connected in series. At least one of the logic cells includes a standard cell which includes a MIS transistor, an input terminal to which an output signal from a previous stage is inputted as an input signal, and an output terminal. A first conductivity-type first MIS transistor which is provided between the output terminal of the standard cell and a first power supply voltage, the first MIS transistor including a control terminal to which a circuit control signal is inputted, and the first MIS transistor supplying the first power supply voltage to the output terminal of the standard cell based on the circuit control signal in order to bring the standard cell into an operation-stopped state. A second conductivity-type second MIS transistor cuts off a leakage current of the MIS transistor in the standard cell.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: October 13, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mototsugu Hamada, Tsuyoshi Nishikawa, Toshiyuki Furusawa
  • Patent number: 7586364
    Abstract: A power supply voltage controlling circuit has a voltage regulator circuit that supplies a current to an output terminal from at least any of a first power supply and a second power supply, and compares an output voltage at the output terminal with a first reference voltage to adjust the output voltage to approach the first reference voltage; and a controller circuit that supplies the first reference voltage to the voltage regulator circuit and controls the voltage regulator circuit by outputting, to the voltage regulator circuit, at least any of a first enable signal for enabling the first power supply to supply a current to the output terminal and a second enable signal for enabling the second power supply to supply a current to the output terminal.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: September 8, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Fujita, Mototsugu Hamada
  • Patent number: 7551019
    Abstract: This disclosure concerns a semiconductor integrated circuit that includes a semiconductor substrate, a plurality of well regions formed on one surface of the semiconductor substrate and electrically isolated from each other, a plurality of MOS transistors formed in the well regions and a substrate bias generator that applies substrate biases to the individual well regions based on actually measured process-derived variance of the MOS transistors in threshold voltage to bring the threshold voltages of the respective MOS transistors into conformity with a normal threshold voltage.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: June 23, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Fujita, Mototsugu Hamada, Hiroyuki Hara
  • Patent number: 7479806
    Abstract: The semiconductor integrated circuit device is a semiconductor integrated circuit device having a pulse generator and a latch circuit. The pulse generator has a first charge/discharge path and a second charge/discharge path and a charge unit for pre-charging first nodes. The first charge/discharge path and the second charge/discharge path include: two first switching units, connected to the first nodes, and configured to control, according to an input signal, conduction and non-conduction of the first charge/discharge path and the second charge/discharge path; and a second switching unit, disposed between a second node and a reference voltage node, and configured to be turned on in a period prior to capturing the input signal to allow an electric charge accumulated at the second node to be discharged to the reference voltage node, and at the same time, configured to be turned on in a period of capturing the input signal to allow the first node to discharge.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: January 20, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Chen Kong Teh, Mototsugu Hamada
  • Publication number: 20080298117
    Abstract: A semiconductor integrated circuit device, has a first variable resistor element and a second variable resistor element whose resistances are changed complementarily depending on a current; and a current path switching circuit that supplies said current from a power supply by switching between current paths according to whether a normal operation mode or a read mode is input externally, wherein said power supply is turned off and then turned on again in said normal operation mode, and in this state, data corresponding to the relationship between the magnitudes of the resistances of said first variable resistor element and said second variable resistor element is read in said read mode.
    Type: Application
    Filed: October 15, 2007
    Publication date: December 4, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Mototsugu Hamada, Takahiro Hirai, Shiho Nakamura, Hirofumi Morise, Keiko Abe
  • Patent number: 7456669
    Abstract: A semiconductor integrated circuit device includes a comparator for making a comparison between a logical value of an input signal and a logical value of an output signal and outputting a combination signal having a combination of the logical values; and a flip-flop circuit configured to maintain a state of the output signal with electric power for maintaining the state less than electric power for state transition of the output signal in the case where the combination of the logical values of the combination signal is a predetermined combination, and wherein the comparator outputs the combination signal having the predetermined combination to an input terminal portion in the case of determining that the input signal does not vary the state of the output signal based on a result of the comparison between the logical value of the input signal and the logical value of the output signal.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: November 25, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Chen Kong Teh, Mototsugu Hamada
  • Publication number: 20080283871
    Abstract: A semiconductor integrated circuit having a substantially rectangular standard cell divided by first borderlines opposed to other standard cells longitudinally adjacent to the standard cell and second borderlines opposed to other standard cells laterally adjacent to the standard cell, the standard cell has: a p-type MOS transistor having first diffused regions and a first gate electrode; an n-type MOS transistor having second diffused regions and a second gate electrode with STI disposed for device isolation between the n-type MOS transistor and the p-type MOS transistor substantially in parallel with the first borderlines; dummy p-type MOS transistors having third gate electrodes disposed on the second borderlines so as to be adjacent to the first diffused regions of the p-type MOS transistor, the third gate electrodes being connected to power supply wiring so as to turn off the dummy p-type MOS transistors; and dummy n-type MOS transistors having fourth gate electrodes disposed on the second borderlines so
    Type: Application
    Filed: May 5, 2008
    Publication date: November 20, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Mototsugu HAMADA