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JP4194451B2 |
The present invention relates to a configuration utilizing a driven element that is driven by a current. Specifically, there is provided a pixel circuit having a driven element and a current-drive transistor for supplying a current for d...
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JP2008544683A |
A pseudo-sine signal generation device (D) comprises i) a differential tunable integration means (SI) arranged to generate differential triangular signals (TS) with a chosen constant output amplitude from input differential square signal...
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JP2008219155A |
To provide a PWM signal generation circuit which can generate a high-resolution PWM signal with high precision.The PWM signal generation circuit comprises a circuit generating a digital PWM signal based on a clock signal CLK, a triangle ...
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JP2008205749A |
To provide a "pulse signal output circuit" which can prevent the generation of a harmonic component which leads EMC (Electro Magnetic Compatibility) interference from a wiring pattern or a signal line of the pulse signal output circuit o...
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JP2008199095A |
To output a stable oscillation frequency without being influenced by dispersion in process variation or changes in external environments.The semiconductor integrated circuit device 30 is provided with a CR oscillation circuit 1 and a ref...
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JP4140534B2 |
A voltage-to-time conversion circuit compares a ramp-wave voltage, which steps up at a certain gradient, with each of a reference voltage, an input voltage, and a reference voltage, and produces a PB pulsating signal representing the tim...
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JP4139447B2 |
A circuit (10) for generating a voltage ramp signal (VRAMP) having minimum amplitude variation over a large frequency range has been provided. The circuit includes a comparator (40) for comparing a voltage across a ramp capacitor (32) wi...
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JP3144043U |
To provide a circuit for obtaining a detection reference voltage used for a comparator, which is continuous without being stepped. An electric circuit having a comparator that compares a voltage of an input audio signal with a detection ...
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JP2008167091A |
To prevent blunting of the waveform of triangular waves in a comparatively high oscillation frequency regarding an oscillation circuit outputting two triangular waves having the same amplitude and inverted phase and a PWM circuit using t...
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JP4111636B2 |
The oscillator 40 with cycle time correction includes a low accuracy oscillator 30A generating a clock CLK3, a counter 41 counting the clock CLK3 and cleared by activation of a clear signal CLR1, a register 42 storing a count CN of the c...
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JP4105831B2 |
A waveform generation circuit 16 comprises an input terminal 28, a composing unit 21, a delay unit 23, a processing unit 25, a memory unit 27 and an output terminal 52. The predetermined pulse enters the input terminal 28 as an input sig...
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JP2008136107A |
To provide a Ramp wave generation circuit which generates ramp wave in the ideal waveform varying at high speed.Conduction of a switch 21 and a switch 22 is alternately switched to alternately output ramp wave R1 to be output from a ramp...
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JP4100455B1 |
A pulse width modulation circuit 1 of the present invention changes the voltage of a first integration circuit C1 during the first period T1 of the clock signal MCLK based on a current based on an audio signal eS, changes the voltage of ...
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JP4085664B2 |
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JP4063154B2 |
To provide an oscillation circuit which operates even with low power voltage of 1V or below, with which a constant frequency is obtained with respect to fluctuation of power voltage and which has less fluctuation of the frequency. The ci...
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JP2008054220A |
To improve precision of a pulse signal period.In the timing of level transition when a second period voltage Vsaw2 becomes equal with a main reference voltage Vmain, a first period voltage generating circuit 74 starts a first monotonous ...
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JP4057438B2 |
A multiplicity of electronic devices is provided to generate triangular wave signals variable between an upper and lower limit voltages by charging or discharging capacitors. One of the triangular wave signals serves as a master triangul...
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JP2008028831A |
To provide a voltage-controlled oscillator obtaining an oscillation signal with a comparatively low frequency using neither AGC means nor a semiconductor internal resistance with a simple configuration.The voltage-controlled oscillator i...
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JP2008503905A |
The ocillatory dynamics of the inferior olive (IO) neurons found in the olivo-cerebellar network of the brain are reproduced and applied to various control applications. An IO neuron model is provided which produces quasi-sinusoidal osci...
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JP3138669U |
A comparator with a fixed reference voltage (self bias) for an oscillator is disclosed. The comparator includes: a depletion MOS network to form a source current, wherein the gate and the source has a connection; and an enhanced MOS tran...
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JP4032066B2 |
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 g...
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JP4025434B2 |
A current source switch circuit has at least one transistor forming part of a current source, and one switch for controlling the supply of an electric current from the transistor to a load. A voltage application unit applies a voltage ha...
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JP4017537B2 |
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JP2007279198A |
To smoothly generate a ramp signal with low power consumption. A smoothing circuit 12 which smoothes a voltage Vout and outputs a voltage Vrp is arranged behind a ramp signal generating circuit 10 which generates a voltage Vout rising or...
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JP3998394B2 |
A switching regulator, by turning a switching device on and off, converts the level of a direct-current voltage fed in via an input terminal, and then feeds out the thus level-converted voltage via an output terminal. A waveform shaping ...
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JP3997248B2 |
A clock circuit includes an oscillator (15) for generating a reference frequency signal, and a spread spectrum clock generator (14) cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental...
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JP2007274743A |
To obtain an oscillation circuit for generating triangular waves having different frequencies, phases or amplitude widths synchronously with a standard triangular wave in generating a plurality of the triangular waves. When voltages VC1 ...
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JP3991863B2 |
A sawtooth wave generating apparatus includes a base frequency generating section and a frequency generating section for generating the frequency of a reference signal, a sawtooth wave forming section which forms a sawtooth wave based on...
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JP2007266908A |
To realize spread spectrum modulation and pulse width modulation in a pulse signal generating circuit. A digital random signal S0 output from a pseudo-random number generator 10 is converted into an analogue random voltage S1 through a D...
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JP3982342B2 |
The integrating circuit of the triangular wave generating circuit includes an operational amplifier and a capacitor. Switch elements are alternatively turned ON and capacitors are alternatively recharged by the currents flowing in consta...
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JP3981612B2 |
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JP2007243992A |
To provide a circuit and a system for ramping a voltage across a load (506). This circuit and the system include a charging circuit (500) for charging a capacitor (501) to generate a ramp-up waveform. A circuit (511) selectively decouple...
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JP2007243922A |
To provide an oscillation circuit capable of providing signals of stable cycles even if noise is generated. In the oscillation circuit of the Fig. 1, a high-level signal is inputted to a S terminal of a RS flip-flop circuit 108 when a vo...
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JP3970839B2 |
To provide a non-linear load boosting circuit that can adjust the amplitude of triangular waves, based on the difference between a feedback voltage and a reference one, thereby to sufficiently shorten the time for reaching a steady state...
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JP3972865B2 |
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JP3965608B2 |
To provide a low pressure fluorescent lamp control device at low cost with high integration, equipped with a floating switching circuit responding to an intelligent switching circuit. A control switch has a first and second switch circui...
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JP3965171B2 |
To provide a multiple phase triangle wave oscillation circuit which can oscillate and output multiple phase triangle waves in relation of waveforms, wave peak values, and phases as specified, and stably and surely oscillates and outputs ...
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JP3963421B2 |
To solve the problem that an exact system parameter is maintained while a comparatively inexpensive oscillator is required. A controlled oscillator generates a cyclic output signal having first and second output level states. The oscilla...
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JP2007195249A |
To provide a circuit for sensing a motor current using low side shunt resistance. A combined motor drive and current sensing circuit comprises: power transistors (Q1, Q2) connected to a load, gate drive units (20, 22) for supplying gate ...
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JP3951674B2 |
To generate a two phase triangular wave signal with an equal amplitude and a constant phase difference. A Vreg terminal is to input controlled power supply, and a GND terminal is for ground connection. A current source 10 is to supply a ...
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JP3952970B2 |
To reduce a noise peak value without enlarging a circuital size of a semiconductor integrated circuit, by dispersing an oscillating frequency with a fixed frequency span. A pulse width modulation circuit 10 includes a triangular wave osc...
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JP2007189600A |
To provide a sawtooth wave generating circuit which is simple in configuration, capable of generating accurate sawtooth waves, and obtaining the good linearity of an outputted duty ratio even when the sawtooth waves are used as a compari...
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JP3947438B2 |
To provide a predrive circuit and a display unit for driving an output element so as to stably transmit a control signal even when a reference potential generated at an output element side is turned into a high voltage. A comparator circ...
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JPWO2005060131A1 |
The reactorance regulator sends high-level and low-level signals to the electrode (123) that induces an electric charge in the electric charge transmission medium (121), the resonance part (7) for adjusting the reactorance value, and the...
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JP3935891B2 |
To provide a ramp voltage generating apparatus, capable of generating a plurality of ramp voltages whose phases are shifted from each other, using a simple circuit configuration. The ramp voltage generating apparatus includes a ramp volt...
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JP3937888B2 |
To provide an oscillation detecting circuit which can detect stably oscillation of an oscillation circuit without being affected by an irregularity in transistor characteristic. Current sources IS11, IS12 are connected in series between ...
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JP3935925B2 |
To provide an output buffer circuit which shifts the voltage of a high-speed output signal, while suppressing the noise due to the signal transition. In driving a PMOS transistor P1, NMOS transistors N11, N12, N13 are turned on in a stat...
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JP2007143099A |
To provide a ramp signal generation circuit and an electro-optical device with low power consumption.As a first process a single-throw switch S0 is closed, and for double-throw switches S1-u, S1-d, S2 a terminal a and a common terminal a...
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JP3915530B2 |
To provide an oscillator which generates a stable oscillation waveform, when the change in an environmental temperature is large. In a first voltage source, a first divided voltage, wherein a DC power source is divided into a plurality o...
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JP3914047B2 |
To solve the problem wherein the amplitude of a triangular wave signal becomes larger as the frequency of the triangular wave signal increases, resulting in a decrease of a maximum on duty ratio. In an oscillation circuit used for PWM (p...
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