Assignee: Nippon Precision Circuits Inc.

Location: Tokyo, JP
No. of patents: 96

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Number	Title	Issue Date
6885048	Transistor-type ferroelectric nonvolatile memory element A transistor-type ferroelectric nonvolatile memory element having an MFMIS (metal-ferroelectric-metal-insulator-semiconductor) structure that can be highly densely integrated. The MFMIS transistor has a constitution in which the MFM (metal-ferroelectric-metal) struc...	04/26/2005
6750501	Transistor type ferroelectric body nonvolatile storage element A ferroelectric body transistor having a structure of MFMIS (conductor film) -ferroelectric film-conductor film-insulating film-semiconductor) including a gate insulator capacitor having an MIS structure, a low dielectric constant layer restraining layer interposed ...	06/15/2004
7496169	Frequency synthesizer, pulse train generation apparatus and pulse train generation method A frequency synthesizer comprises a digital/analog converter which sequentially converts difference data of phase data indicating the phase of a reference signal to an analog value, a voltage signal generator which integrates the analog value converted by the digita...	02/24/2009
7205801	Power down circuit capable of a wide rage control signal regardless of the power supply voltage fluction The present invention is to provide a power down circuit, which can configure a wide range of the voltage of the control signal regardless of the fluctuation of the power supply voltage. In the power down circuit 1, the drain of the first N channel MOS transi...	04/17/2007
7102432	Class D amplifier A class D amplifier capable of compressing a dynamic range and reproduction by changing on a real time basis a modulation ratio to a non-linear ratio in accordance with amplitude of an input signal. The class D amplifier including a triangular waveform generation ci...	09/05/2006
7069285	Decimation filter Folding noises into signal bands are reduced and steeper cutoff characteristics are achieved without any increase in the scale of the circuit of a decimation filter attributable to the order of the filter coefficients and the bit precision of the same. Smalle...	06/27/2006
6944113	Method of controlling laser diode in optical disk player and circuit therefor Electric power consumed by a laser diode when an optical disk or magneto-optical disk is played back is reduced. A laser diode control circuit (6) causes the laser diode to emit continuously rather than intermittently, even if a PCK signal is supplied to the ...	09/13/2005
6934324	Zero value-detecting circuit Provided is a circuit that has a simple circuit configuration and can detect zero values in a 1-bit digital signal irrespective of a recording medium such as SACD. DSD data forming the 1-bit digital signal are successively sent to a shift register (1) whose n...	08/23/2005
6898105	Ferroelectric non-volatile memory device having integral capacitor and gate electrode, and driving method of a ferroelectric non-volatile memory device A ferroelectric non-volatile memory device that allows the coupling ratio to be increased and the effect of voltage distribution to the ferroelectric capacitor to be improved without increasing the area of the gate electrode of a detection MIS field effect transisto...	05/24/2005
6794905	CMOS inverter A CMOS inverter capable of operating at low voltages is provided. The gate of a p-channel MOS transistor and the gate of an n-channel MOS transistor are AC coupled to an input terminal via first and second capacitors, respectively. Signals whose amplitude centers ar...	09/21/2004
6788159	Temperature compensated oscillator, adjusting method thereof, and integrated circuit for temperature compensated oscillator A temperature compensated oscillator keeping the area of a capacitor array and the bit number of a memory from increasing and allowing for high precision is provided. A adjusting method of such a resonator and an integrated circuit for temperature compensated oscill...	09/07/2004
6784473	Semiconductor nonvolatile storage element and method of fabricating the same To provide a semiconductor nonvolatile storage device capable of applying distributed voltage efficiently to a ferroelectric capacitor in a semiconductor nonvolatile storage device having an MFMIS structure without enlarging a memory cell area and a method of fabric...	08/31/2004
6733174	Semiconductor temperature detecting method and its circuit A semiconductor temperature detecting circuit use semiconductor temperature sensors each comprising bipolar transistors connected in a Darlington connection to provide a semiconductor temperature detecting circuit capable of automatically compensating for variations...	05/11/2004
6731169	Differential amplifier circuit The first amplifier circuit D1 is formed by connecting drains of a pair of N-channel MOS transistors forming the first current mirror circuit CM1 respectively to the drains of P-channel MOS transistors 1 and 2 as a differential input port...	05/04/2004
6717482	Oscillator circuit and integrated circuit for oscillation A neutralization of an equivalent parallel capacitor of a piezoelectric resonator is realized to obtain a stable activation of oscillation and secure a large frequency variation. A crystal resonator is connected between an input and output terminals of an inverting ...	04/06/2004
6710669	Voltage controlled oscillator To provide a voltage controlled oscillator having a large variable width of oscillation frequency while ensuring oscillation starting performance, a P-channel MOS transistor Tr is made ON by detecting that an oscillation signal is provided with a predetermined ampli...	03/23/2004
6690245	Oscillation control circuit An oscillation control circuit is offered which can improve the startability of an oscillator circuit operating at high frequencies and at a low power-supply voltage. When the oscillation potential of the oscillation signal is between the inversion potent...	02/10/2004
6670854	Fractional-N frequency synthesizer and method of operating the same A fractional-N frequency synthesizer is offered which does not produce spurious signals of periodically conspicuous spectral intensities and can cancel produced spurious signals up to a practical level even with a spurious-canceling circuit of low accurac...	12/30/2003
6670844	Charge pump circuit A highly efficient charge pump circuit featuring easy circuit design and formation as well as high reliability includes transistors M1 -M4 individually having a diode connection configuration and interconnected in cascade, and is ada...	12/30/2003
6646496	Current control circuit A current control circuit for maintaining constant current characteristics with respect to power source potential fluctuations has a first resistor with one end connected to a source potential first and second P-channel field effect transistors each havin...	11/11/2003
6624774	Delta sigma D/A converter In a delta sigma type D/A converter, in order to be capable of carrying out muting operation in steps at steps lower than 1 quantized step by digital processing, a multiplexor 2 for selectively outputting a mute code 15 for making an analog signal null an...	09/23/2003
6608339	Ferroelectric memory element Ferroelectric memory element having an MFIS structure including a silicon semiconductor substrate and an insulating film arranged above the silicon semiconductor substrate. The insulating film includes a low dielectric constant layer restraining film and ...	08/19/2003
6559698	Spread spectrum type clock generating circuit To restrain cycle-to-cycle jitter in a clock generator subjected to EMI a 2nd order PLL having a loop filter including a first capacitor and a first resistor, is provided where a reduction in a comparison frequency is avoided by using a clock m...	05/06/2003
6556094	Oscillator circuit and integrated circuit for oscillation An oscillator circuit adapted for a piezoelectric oscillator which has a weak oscillation output for generating high frequencies is provided. The speed of operation of the oscillator circuit is increased. An integrated circuit for such an oscillator circu...	04/29/2003
6525684	Differential input data slicer Automatic slice level control response to differential input signals is provided to remove in-phase noise and effects on S/N ratio Analog differential input signals Vinp and Vinn are inverted with respect to each other and applied to input terminals in1 a...	02/25/2003
6515601	Noise shaper A pole-shifted noise shaper whose transfer function has a Z-plane in which the pole has been shifted out of the origin. The noise shaper suppresses idle pattern. The noise shaper has a dither adder (17) placed immediately before a quantizer (16) to add a ...	02/04/2003
6515548	Temperature compensated oscillator, its manufacturing method, and integrated circuit for temperature compensated oscillator A temperature compensated oscillator has a frequency comparing circuit for comparing a frequency of an oscillating output signal of an oscillator circuit and a frequency of an external reference frequency signal externally inputted, and also has a sequent...	02/04/2003
6507073	MOS semiconductor device with breakdown voltage performance and method for manufacturing the same MOS semiconductor device including a substrate having source and drain regions laterally spaced from one another and a channel therebetween, a gate electrode over the channel and an oxide layer. The oxide layer includes a gate oxide layer between the gate...	01/14/2003
6476680	Cascode amplifying circuit and folded cascode amplifying circuit To provide a cascode amplifying circuit having large amplifying gain without narrowing an output operational range or deteriorating response performance of the circuit even with a constitution by a small number of elements is achieved by applying negative...	11/05/2002
6465967	Control circuit of light emitting element To make compatible low consumption power formation of a control circuit of a light emitting element and high frequency formation of operational frequency band constituting a variety of usable combination elements of light emitting elements and light recei...	10/15/2002
6437608	Sample-and-hold circuit and A/D converter In a sample-and-hold circuit using a completely differential type operational amplifier circuit, to promote operational stability, to restrain a variation in a balance point of a middle value of differential output signals and to promote stability and acc...	08/20/2002
6433635	Amplifier To provide an amplifier excellent in temperature characteristic and providing an output signal having small crossover distortion in a wide power source voltage range, voltage values provided to positive phase input terminals of a second and a third amplif...	08/13/2002
6429695	Differential comparison circuit A differential comparison circuit capable of easily obtaining desired circuit accuracy and comparing differential signals with reduced influences of fluctuation of a power source voltage. Input/output terminals I/O1 and I/O2 of a latch circuit 1 are conne...	08/06/2002
6411172	Oscillator circuit with reduced capacity for AC coupling capacitor There is disclosed an oscillator circuit in which the first capacitor is connected between the input side of a CMOS inverter in a quartz oscillator circuit and a higher potential side, the second load capacitor is connected between the input side of the i...	06/25/2002
6369731	Delta sigma D/A converter The problem of the present invention is, in a plural-number order delta sigma D/A converter, not to cause click noise upon performing mute operation at no-signal input idling and hence to eliminate the necessity of a circuit for removing this. In order to...	04/09/2002
6360349	Syndrome computing apparatus A syndrome computing apparatus includes first syndrome computing circuit 2, 4 for receiving a predetermined number of bits of data (codewords) encoded based on a predetermined generator polynomial and performing a syndrome computation on the data inputted...	03/19/2002
6351149	MOS transistor output circuit There is disclosed a MOS transistor output circuit capable of suppressing ringing and other noises and of operating at high speed under low power supply voltages. A signal corresponding to an input signal is applied to the gates of a first p-channel MOS t...	02/26/2002
6346862	Quartz oscillation circuit and quartz oscillation integrated circuit device In a quartz oscillation circuit, electric current flowing through a quartz oscillator is reduced. Resistors Rg and Rd are provided respectively in any of paths formed by an output terminal, a capacitance element Cd and a power supply terminal VDD of a CMO...	02/12/2002

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Assignee: Nippon Precision Circuits Inc.