Inventor: Atsushi Takeuchi

Address: Kawasaki, JP
No. of patents: 30
Last patent issue date: 11/15/2011

Number	Title	Issue Date
8060313	Simulation system using electromagnetic field analysis and circuit analysis and recording medium storing simulation program A simulation system includes electromagnetic field analyzing units that execute electromagnetic field analysis with respect to electromagnetic field analysis areas obtained by division of an area to be analyzed into the electromagnetic field analysis areas; one or m...	11/15/2011
7891869	Temperature sensor circuit and calibration method thereof A temperature sensor circuit comprises a first monitor voltage generation circuit that generates a first monitor voltage with a characteristic that changes with respect to temperature; a second monitor voltage generation circuit that generates a second monitor volta...	02/22/2011
7859135	Internal power supply circuit having a cascode current mirror circuit A current mirror circuit which is connected to first and second power supplies and generates a desired current, has a plurality of first transistors which are connected in parallel to the first power supply side and the gates of which are connected to a common node,...	12/28/2010
7859322	Internal power-supply circuit An internal power-supply circuit generates an internal voltage based on a reference voltage, and has an external-power-supply terminal to which an external power-supply voltage having a first potential is applied during a normal operation and an external power-suppl...	12/28/2010
7821863	Voltage supply circuit and semiconductor memory Each of first and second differential amplifiers has a function of increasing a bias current in response to the activation of a drivability control signal. A first driving circuit connects an output node to a high power supply line in response to the activation of a...	10/26/2010
7679424	Semiconductor device with pad switch A semiconductor device includes a pad, an internal power supply line, a pad switch including a MOS transistor to provide an electrically connectable coupling between the internal power supply line and the pad by use of a source-drain channel thereof, and a control c...	03/16/2010
7633825	Semiconductor memory device with reduced current consumption A semiconductor memory device includes a DRAM memory core circuit including a word line, a power supply circuit configured to operate in a selected one of a first state and a second state to generate a predetermined power supply voltage for provision to the DRAM mem...	12/15/2009
7538602	Semiconductor integrated circuit with stepped-down voltage generating circuit A semiconductor integrated circuit includes a voltage generating circuit configured to generate a predetermined voltage, an NMOS transistor configured to receive at a gate node thereof the predetermined voltage generated by the voltage generating circuit, to receive...	05/26/2009
7508729	Oscillator circuit generating oscillating signal having stable cycle An oscillator circuit includes a capacitor, a first constant current source electrically couplable to an end of the capacitor, a second constant current source electrically couplable to the end of the capacitor, a control circuit coupled to the end of the capacitor,...	03/24/2009
7460416	Voltage supply circuit and semiconductor memory Each of first and second differential amplifiers has a function of increasing a bias current in response to the activation of a drivability control signal. A first driving circuit connects an output node to a high power supply line in response to the activation of a...	12/02/2008
7399116	Temperature sensor circuit and calibration method thereof A temperature sensor circuit comprises a first monitor voltage generation circuit that generates a first monitor voltage with a characteristic that changes with respect to temperature; a second monitor voltage generation circuit that generates a second monitor volta...	07/15/2008
7348835	Midpoint potential generating circuit for use in a semiconductor device An object of the invention is to improve a defect caused at the time of starting a midpoint potential generating circuit for use in a semiconductor device. A bias generating circuit supplies a grounding potential as a bias voltage Vbias and sets a midpoint potential...	03/25/2008
7336108	Semiconductor integrated circuit with stepped-up voltage pump circuit A semiconductor integrated circuit includes a pump circuit configured to raise an external power supply voltage to generate a stepped-up voltage, and a detector circuit configured to detect the stepped-up voltage generated by the pump circuit to control activation/d...	02/26/2008
7307885	Multi-value nonvolatile semiconductor memory device equipped with reference cell and load balancing circuit A nonvolatile semiconductor memory device includes a plurality of memory cells holding memory cell information, a plurality of bit lines connected to the plurality of memory cells, the plurality of bit lines including a first bit line conected to a selected one of t...	12/11/2007
7251169	Voltage supply circuit and semiconductor memory Each of first and second differential amplifiers has a function of increasing a bias current in response to the activation of a drivability control signal. A first driving circuit connects an output node to a high power supply line in response to the activation of a...	07/31/2007
7224211	Midpoint potential generating circuit for use in a semiconductor device An object of the invention is to improve a defect caused at the time of starting a midpoint potential generating circuit for use in a semiconductor device. A bias generating circuit supplies a grounding potential as a bias voltage Vbias and sets a midpoint potential...	05/29/2007
7200051	Semiconductor integrated circuit device having power supply startup sequence A semiconductor integrated circuit device, which drives a first region and a second region provided via capacitance to a positive internal power supply and a negative internal power supply respectively, comprises a first internal power supply generation circuit that...	04/03/2007
7184296	Memory device A memory device has a data line (DATA-BUS) for connection to a memory cell, a reference line (Reference-BUS) for reference, a precharge circuit (101), a load circuit (102), and an amplifier circuit (103). The precharge circuit is connected to th...	02/27/2007
6483756	Sequence circuit and semiconductor device using sequence circuit A semiconductor device includes a word line that is reset to a negative voltage when the word line is unselected. The semiconductor device further includes a sequence circuit that clamps the word line to a first fixed voltage, until a fixed power-supply v...	11/19/2002
5812574	Quantum optical semiconductor device producing output optical emission with sharply defined spectrum An optical semiconductor device includes a plurality of quantum structures in an active layer thereof, wherein each of the quantum structures is confined in at least two of the three, mutually perpendicular dimensions, and wherein at least two of the quan...	09/22/1998
5650611	Light switching method, light switching apparatus and optical semiconductor device A light switching apparatus includes an optically non-linear etalon, a first optical part for applying a signal light of a linear polarization to the optically non-linear etalon, and a second optical part for applying a control light of a circular polariz...	07/22/1997
5225692	Non-linear quantum semiconductor optical device having a signal-to-noise ratio A non-linear semiconductor optical device comprises a first quantum well layer having discrete quantum levels of carriers including a first quantum level for electrons and a second quantum level for holes with an energy gap corresponding to a wavelength o...	07/06/1993
4965768	Semiconductor device having programmable read only memory cells for specific mode A semiconductor device having an internal circuit comprising a program circuit for programming a PROM, a discrimination circuit for discriminating the contents of the PROM, and a specific mode starting circuit for bringing the internal circuit to a specif...	10/23/1990
4862416	Semiconductor memory device with redundant memory cell A semiconductor memory device has a redundant memory cell, wherein faulty memory cells are replaced with redundant memory cells during the production. The memory device comprises a forced release circuit for releasing the replacement with the redundant me...	08/29/1989
4812680	High voltage detecting circuit A high voltage detecting circuit included in a semiconductor device having terminals for generating a control signal in order to start a specific mode of the semiconductor device when a potential of a specific mode signal higher by a predetermined value t...	03/14/1989
4800304	Time delay circuit for a semiconductor device A plurality of time delay circuit, usually a dummy word line made similarly to a word line having a delay characteristics for charging and discharging, are provided in a memory device in place of a single delay circuit of prior art. A selection circuit se...	01/24/1989
4758748	Sense amplifier for programmable read only memory A sense amplifier for a programmable read only memory having a sense current source circuit for supplying memory cells in the memory with currents. The sense current source circuit is adapted to supply memory cells with a cell current for both a regular r...	07/19/1988
4743841	Semiconductor integrated circuit including circuit elements evaluating the same and having means for testing the circuit elements A semiconductor integrated circuit including at lease one circuit (6, 8, 9, 71, 72, 104 to 106, 118, 119), at least one evaluating circuit element (10, 11, 12), a plurality of bonding pads (31 to 39) operatively connectable to the circuit and the evaluati...	05/10/1988
4737936	Semiconductor memory device having improved write-verify operation In a semiconductor memory device comprising row decoders, word line drivers, word lines, memory cells, a d.c. power source for a write mode, and a d.c. power source for a read mode, one of the word line drivers comprises a first circuit for supplying a wr...	04/12/1988
4717835	Semiconductor integrated circuit with detection circuit for address signal change A semiconductor integrated circuit with a detection circuit for detecting an address signal change comprises a plurality of gate circuits, and a plurality of delay circuits able to be reset, and each delay circuit is reset when the address signal or an in...	01/05/1988

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Inventor: Atsushi Takeuchi