Patents by Inventor Hiroshi Shigehara

Hiroshi Shigehara 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: 9057623
    Abstract: A navigation device includes a road periphery display change unit 3 that selects a road R which connects to, intersects with, or is adjacent to a guidance route/a travel plan route 21 from a map database 5, and displays the road in a high contrast on the inside of a predetermined distance from the guidance route/the travel plan route 21, displays the road in a low contrast on the outside of the predetermined distance, and displays the road by changing continuously or stepwise a gradation in an intermediate region between the inside and the outside.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: June 16, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tsuyoshi Sempuku, Yoko Sano, Hiroshi Shigehara, Makoto Otsuru, Kotoyu Sasayama
  • Publication number: 20120323487
    Abstract: A navigation device includes a road periphery display change unit 3 that selects a road R which connects to, intersects with, or is adjacent to a guidance route/a travel plan route 21 from a map database 5, and displays the road in a high contrast on the inside of a predetermined distance from the guidance route/the travel plan route 21, displays the road in a low contrast on the outside of the predetermined distance, and displays the road by changing continuously or stepwise a gradation in an intermediate region between the inside and the outside.
    Type: Application
    Filed: May 23, 2011
    Publication date: December 20, 2012
    Inventors: Tsuyoshi Sempuku, Yoko Sano, Hiroshi Shigehara, Makoto Otsuru, Kotoyu Sasayama
  • Patent number: 6462611
    Abstract: Two terminals of each of transistors (P1, N1) are connected between two terminals (A, B). A body effect compensation circuit (COMP-P1) for the transistor (P1) and a body effect compensation circuit (COMP-N1) for the transistor (N1) are arranged. The back gates of transistors (P1P, P2P) in the circuit (COMP-P1) and transistors (P1N, P2N) in the circuit (COMP-N1) are commonly connected to the back gate of the transistor (P1). The back gates of transistors (N1N, N2N) in the circuit (COMP-N1) and transistors (N1P, N2P) in the circuit (COMP-P1) are commonly connected to the back gate of the transistor(N1). With this structure, in transferring a signal from one terminal (A or B) to the other terminal (B or A) or vice verse, the signal potential is transferred to the back gates of the transistors (P1, N1) at a high speed to increase the signal transfer speed.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 8, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa, Toshinobu Hisamoto
  • Publication number: 20020053941
    Abstract: Two terminals of each of transistors (P1, N1) are connected between two terminals (A, B). A body effect compensation circuit (COMP-P1) for the transistor (P1) and a body effect compensation circuit (COMP-N1) for the transistor (N1) are arranged. The back gates of transistors (P1P, P2P) in the circuit (COMP-P1) and transistors (P1N, P2N) in the circuit (COMP-N1) are commonly connected to the back gate of the transistor (P1). The back gates of transistors (N1N, N2N) in the circuit (COMP-N1) and transistors (N1P, N2P) in the circuit (COMP-P1) are commonly connected to the back gate of the transistor (N1). With this structure, in transferring a signal from one terminal (A or B) to the other terminal (B or A) or vice verse, the signal potential is transferred to the back gates of the transistors (P1, N1) at a high speed to increase the signal transfer speed.
    Type: Application
    Filed: December 28, 2001
    Publication date: May 9, 2002
    Inventors: Hiroshi Shigehara, Masanori Kinugasa, Toshinobu Hisamoto
  • Patent number: 6335653
    Abstract: Two terminals of each of transistors (P1, N1) are connected between two terminals (A, B). A body effect compensation circuit (COMP-P1) for the transistor (P1) and a body effect compensation circuit (COMP-N1) for the transistor (N1) are arranged. The back gates of transistors (P1P, P2P) in the circuit (COMP-P1) and transistors (P1N, P2N) in the circuit (COMP-N1) are commonly connected to the back gate of the transistor (P1). The back gates of transistors (N1N, N2N) in the circuit (COMP-N1) and transistors (N1P, N2P) in the circuit (COMP-P1) are commonly connected to the back gate of the transistor (N1). With this structure, in transferring a signal from one terminal (A or B) to the other terminal (B or A) or vice verse, the signal potential is transferred to the back gates of the transistors (P1, N1) at a high speed to increase the signal transfer speed.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: January 1, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa, Toshinobu Hisamoto
  • Patent number: 6288582
    Abstract: An output circuit for a semiconductor integrated circuit includes an output terminal, a first NMOS transistor having one end of a current path between a drain and a source thereof connected to a first node, having a control signal input a gate thereof, and having the other end of the current path connected to a ground potential node, a second NMOS transistor having one end of a current path between a drain and a source thereof connected to the first node and the other end connected to an output terminal, a PMOS transistor and an NMOS transistor connected between a second node that is a gate of the second NMOS transistor and the output terminal, to act as capacitance elements, and a pull-up element connected between the second node and the node of the power potential.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: September 11, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Shigehara
  • Patent number: 6249146
    Abstract: Either the power-supply potential or a ground potential is applied to a power-supply node through a switch. When a potential higher than the ground potential is applied to the output terminal while an power-supply node is connected to the ground-potential node, the potential of a back gate of a first PMOS transistor incorporated in an output section increases in accordance with the potential of the output terminal, due to the pn-junction provided between a drain and back gate of the first PMOS transistor. At this time, a second PMOS transistor whose source-drain path is connected between the back gate and gate of the first PMOS transistor is turned on, whereby the potential of the back gate of the first PMOS transistor is transferred to the gate thereof.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: June 19, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 6194952
    Abstract: When a power supply terminal (10) is grounded, a circuit (101) is in the OFF state, and a high potential is transferred from a circuit (3) to a bus line (BL), the high potential is transferred to a node (100) via the source of a transistor (P1), back gate (Nw), and transistor (P2). A NAND circuit (NA1) always outputs a control signal (VGP) of a level equal to the node (100) to the gate of the transistor (P1) to turn non-conductive the transistor (P1). Hence, a current path from a terminal (B) to a terminal (A) or from the terminal (B) to the back gate (Nw) is cut off to prevent wasteful current consumption.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: February 27, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Shigehara
  • Patent number: 6169443
    Abstract: Two terminals of each of transistors (P1, N1) are connected between two terminals (A, B). A body effect compensation circuit (COMP-P1) for the transistor (P1) and a body effect compensation circuit (COMP-N1) for the transistor (N1) are arranged. The back gates of transistors (P1P, P2P) in the circuit (COMP-P1) and transistors (P1N, P2N) in the circuit (COMP-N1) are commonly connected to the back gate of the transistor (P1). The back gates of transistors (N1N, N2N) in the circuit (COMP-N1) and transistors (N1P, N2P) in the circuit (COMP-P1) are commonly connected to the back gate of the transistor (N1). With this structure, in transferring a signal from one terminal (A or B) to the other terminal (B or A) or vice verse, the signal potential is transferred to the back gates of the transistors (P1, N1) at a high speed to increase the signal transfer speed.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: January 2, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa, Toshinobu Hisamoto
  • Patent number: 6097217
    Abstract: Either the power-supply potential or a ground potential is applied to a power-supply node through a switch. When a potential higher than the ground potential is applied to an output terminal while the power-supply node is connected to the ground-potential node, the potential of a back gate of a first PMOS transistor incorporated in an output section increases in accordance with the potential of the output terminal, due to a pn-junction provided between the drain and back gate of the first PMOS transistor. At this time, a second PMOS transistor whose source-drain path is connected between the back gate and gate of the first PMOS transistor is turned on, whereby the potential of the back gate of the first PMOS transistor is transferred to the gate thereof.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: August 1, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 6084431
    Abstract: In a case where a plurality of outputs are connected and used, even when a voltage higher than the power-supply voltages inside the integrated circuit is applied to the signal output terminal, the reliability of the internal elements is prevented from deteriorating. The semiconductor integrated circuit includes a PMOS transistor that has its source potentially isolated from its back gate and has one end of the current path between its source and drain connected via a transistor switch to the signal output terminal.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: July 4, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Yoshihiro Iwamoto
  • Patent number: 6054736
    Abstract: A semiconductor device of the present invention comprises: a semiconductor substrate of a first conductive type; a gate electrode formed on the semiconductor substrate; a first semiconductor region of a second conductive type different from the first conductive type, the first semiconductor region being formed on the semiconductor substrate in one of both side regions of the gate electrode so as to be adjacent to the gate electrode; a second semiconductor region of the second conductive type formed on the semiconductor substrate in the other region of the both side regions of the gate electrode so as to be adjacent to the gate electrode; a third semiconductor region of the second conductive type formed in the one region so as to be isolated from the first semiconductor region and to be spaced from the second semiconductor region by a greater distance than that between the first and third semiconductor regions; a connecting portion for connecting the first semiconductor region to the third semiconductor region
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: April 25, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa, Akira Takiba, Ryouichi Isohata
  • Patent number: 6020778
    Abstract: Two terminals of each of transistors (P1, N1) are connected between two terminals (A, B). A body effect compensation circuit (COMP-P1) for the transistor (P1) and a body effect compensation circuit (COMP-N1) for the transistor (N1) are arranged. The back gates of transistors (P1P, P2P) in the circuit (COMP-P1) and transistors (P1N, P2N) in the circuit (COMP-N1) are commonly connected to the back gate of the transistor (P1). The back gates of transistors (N1N, N2N) in the circuit (COMP-N1) and transistors (N1P, N2P) in the circuit (COMP-P1) are commonly connected to the back gate of the transistor (N1). With this structure, in transferring a signal from one terminal (A or B) to the other terminal (B or A) or vice verse, the signal potential is transferred to the back gates of the transistors (P1, N1) at a high speed to increase the signal transfer speed.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: February 1, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa, Toshinobu Hisamoto
  • Patent number: 5892387
    Abstract: In a situation where another analog switching circuit 502 outputs a high potential Vh, this high potential Vh is applied to an output terminal OUT1 of an analog switching circuit 504. When a ground potential is supplied to a node 10 with a changeover switch SW, a diode DD1 falls to an inversely biased state, whereby a potential at a backgate node Nw comes to be approximately equal to the potential Vh. Moreover, a potential approximately equal to the potential Vh is a power source terminal of an NAND gate NAND1, and it is transmitted to an output terminal VGP through an internal circuit, whereby a P channel MOS transistor P1 is turned off. Moreover, the output VGP from an inverter INV5 makes also an N channel MOS transistor N1 turn off. With such a constitution, an unnecessary current is prevented from flowing from a power source potential terminal on a bus line and so on to a ground potential terminal through a parasitic diode, thereby performing full-swinging without lowering an output level.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: April 6, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 5880603
    Abstract: Either a power-supply potential or a ground potential is applied to a power-supply node through a switch. When a potential higher than the ground potential is applied to an output terminal while the power-supply node is connected to the ground-potential node, the potential of a back gate of a first PMOS transistor incorporated in an output section increases in accordance with the potential of the output terminal, due to a pn-junction provided between the drain and back gate of the first PMOS transistor. At this time, a second PMOS transistor whose source-drain path is connected between the back gate and gate of the first PMOS transistor is turned on, whereby the potential of the back gate of the first PMOS transistor is transferred to the gate thereof.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: March 9, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 5841619
    Abstract: To an input terminal is connected one end of the source-to-drain current path of an NMOS the gate of which is connected to Vcc. The other end of the current path of the NMOS is connected by a protection circuit comprised of a PMOS and an NMOS to the common gates of a PMOS and an NMOS in the input stage of an internal circuit. In the protection circuit, the PMOS has its source and gate connected to Vcc and its drain connected to the common gates of the PMOS and the NMOS, while the NMOS has its source and gate connected to Vss and its drain connected to the common drains of the PMOS and the NMOS.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: November 24, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Yasunori Tanaka, Junya Masumi
  • Patent number: 5831449
    Abstract: An output circuit comprising an output stage and a control signal generator. The output stage is constituted by a first P-channel MOS transistor and an N-channel MOS transistor. The control signal generator generates a signal for driving the gates of the MOS transistors, it comprises a NAND gate, a NOR gate NOR1 and an inverter INV1. The first P-channel MOS transistor of the output stage has a source and a back gate which are isolated in terms of potential. A second P-channel MOS transistor is provided, whose source-drain path is connected between the back gate and gate of the first P-channel MOS transistor incorporated in the output stage.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: November 3, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 5825220
    Abstract: An auto-clear circuit which has a switch device connected between a power supply voltage terminal and first and second nodes, and a potential division device, connected between the first node and a ground terminal, for outputting a first potential obtained by dividing a potential of the first node. Also included is a charge/discharge device, connected between the second node and a ground terminal, for charging or discharging the second node on the basis of the first potential output from the potential division device, and a latch device for holding a potential of the second node to output a signal from an output terminal, and supplying the signal to the switch device to control an opening/closing operation.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: October 20, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Kinugasa, Hiroshi Shigehara, Akira Takiba
  • Patent number: 5739702
    Abstract: The bus hold circuit comprises: an input stage inverter (IN1) connected between a first supply voltage (Vcc) terminal and a second supply voltage (Vss) terminal and including: a first P-channel transistor (P1); and a first N-channel transistor (N1) connected in series to the first P-channel transistor, a gate of the first P-channel transistor and a gate of the first N-channel transistor being connected in common to a bus line (INA); and an output stage inverter (IN2) also connected between the first supply voltage (Vcc) terminal and the second supply voltage (Vss) terminal and including: a second P-channel transistor (P4); a third P-channel transistor (P2) connected in series to the second P-channel transistor; and a second N-channel transistor (N2) connected in series to the third P-channel transistor, a gate of the second P-channel transistor (P4) being connected to the bus line (Lout), a gate of the third P-channel transistor (P2) and a gate of the second N-channel transistor (N2) being connected in common
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: April 14, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 5661414
    Abstract: An output circuit comprising an output stage and a control signal generator. The output stage is constituted by a first P-channel MOS transistor and an N-channel MOS transistor. The control signal generator generates a signal for driving the Gates of the MOS transistors, it comprises a NAND gate, a NOR gate NOR1 and an inverter INV1. The first P-channel MOS transistor of the output stage has a source and a back gate which are isolated in terms of potential. A second P-channel MOS transistor is provided, whose source-drain path is connected between the back gate and gate of the first P-channel MOS transistor incorporated in the output stage.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: August 26, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa