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JP4555103B2 |
A ramp signal generation circuit is disclosed. The ramp signal generation circuit comprises a ramp signal generator, a buffer, a comparator, and a switching circuit. The switching circuit provides current to an output of the ramp signal ...
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JP4551862B2 |
To provide a temperature controlled oscillator in which oscillation frequency increases continuously as the temperature rises. The temperature controlled oscillator comprises a temperature detecting section 10 outputting a detection volt...
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JP4549967B2 |
A method for generating a bandlimited digital signal, includes generating a sequence of digital samples of a waveform, such as a sawtooth, square, or pulse waveform. The waveform has a discontinuity with a phase within a particular sampl...
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JP4539977B2 |
A capacitive charge pump that can be implemented in such devices as e.g. a phase locked loop (PLL). The charge pump includes at least one capacitor in the charge path and discharge path for limiting the amount of charge provided to or re...
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JP4537483B2 |
A high dynamic range sensitive sensor element or array is provided which uses phase domain integration techniques to accurately capture high and low intensity images. The sensor element of the present invention is not limited by dynamic ...
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JP4510054B2 |
A micropower RC oscillator comprises a current generating section including a current source that generates a current; and a variable resistor of which the magnitude is variably set and which is configured by combining resistor elements ...
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JP4496479B2 |
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JP2010522502A |
This disclosure describes techniques for generating a set of data points that form a triangular wave having a desired gain and a desired frequency. In one example, the method includes the step of (a) determining an increment value based ...
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JP4493450B2 |
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JP4494763B2 |
A switching signal modulation circuit includes a switching control circuit having an ON time control terminal and an OFF time control terminal, the switching control circuit capable of adjusting respectively separately ON time and OFF ti...
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JP2010136278A |
To provide an apparatus for producing a PWM (Pulse Width Modulation) wave with a high resolution even in a low-speed processor only by adding a simple circuit. A PWM waveform producing apparatus 1 includes: a PWM circuit 100 for producin...
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JP4483101B2 |
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JP2010127645A |
To allow a signal having an arbitrary waveform up to a high frequency area to be generated by expanding a frequency band of the signal to be generated while using a sampling frequency of a relatively low frequency. A complex spectrum in ...
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JP2010114558A |
To provide a sweep tone signal generation circuit for generating a sweep tone signal having a ratio of approximately 1:1 of high level to low level, by a simple configuration.In the sweep tone signal generation circuit, an OP amplifier A...
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JP2010109708A |
To precisely generate a plurality of rectangular wave signals having different desired amplitudes without changing the number of adjustment widths of a D/A converter.A triangular signal generation circuit includes: an integration circuit...
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JP2010109728A |
To provide a phase interpolation circuit for generating a clock signal of a desired phase without performing signal superimposition in a linear area.The phase interpolation circuit includes: a pulse string generation circuit which genera...
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JP4453463B2 |
A triangular wave generating circuit adapted to a class-D amplifier is designed not to use a PLL circuit and to secure robustness regarding an amplification gain irrespective of variations of voltages, thus producing a high-quality trian...
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JP4453925B2 |
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JP2010087561A |
To provide a triangular wave generation device for stably outputting a triangular wave.The triangular wave generation device 200 includes: a triangular wave generating circuit 202 provided with an integrator circuit including an operatio...
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JP2010087883A |
To provide a step voltage generating circuit in which a degree of freedom for a circuit configuration related to a connection form of conductors is improved.In the step voltage generating circuit including (N-1) pieces of conductor syste...
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JP2010087562A |
To provide a triangular wave generation device for stably outputting a triangular wave.The triangular wave generation device includes: a triangular wave generating circuit 102 including a first current source 30, a second current source ...
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JP2010074261A |
To provide a step voltage generating circuit having raised degree of freedom concerning topology of capacitors.The step voltage generating circuit also includes a first stage capacitor array circuit, different from a second stage capacit...
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JP4434759B2 |
In an operational amplifier including first and second power supply terminals, first and second input terminals, and a first and second output terminals, a first differential amplifier circuit includes first and second MOS transistors wi...
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JP2010050614A |
To provide a semiconductor device capable of preventing performance deterioration due to interference of a system clock, or the like, by generating a triangular wave, and to provide an amplifying apparatus.A semiconductor integrated circ...
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JP2010050516A |
To provide a delay circuit of a lamp waveform generation system, capable of shortening a time required for reset operation, corresponding to a high speed repeated input signal by suppressing noise that occurs during the reset operation a...
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JP4404270B2 |
After an output signal S4 is level-inverted, first and second shorting FETs 55, 56 as a level-inversion inhibiting circuit inhibit level-inversion so that the signal is maintained to the inverted state. Thereafter the inhibition of level...
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JP2010011337A |
To provide a sawtooth wave generation circuit, capable of generating a desired voltage waveform without having to use an expensive power amplifier.The sawtooth wave generation circuit includes: a bias means for setting a final voltage va...
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JP4394124B2 |
A charge pump comprises a single voltage multiplier stage ( 1 ) which converts an input voltage (VDD) into an output voltage (Vo) under control of a clock signal (Q, Qn; CLKO). An oscillator ( 2 ) receives the input voltage (VDD) to gene...
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JP2009296413A |
To provide an astable multivibrator equipped with a voltage-controlled oscillator whose frequency is stable even at wide-range output frequency control.In the astable multivibrator having amplitude clipping elements Q3 and Q4 connected t...
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JP4355658B2 |
An oscillator circuit (40, 60) has a comparator circuit (48, 68) and a monitor and control circuit (50, 80). The comparator (48, 68) provides a periodic output signal. The monitor and control circuit (50, 80) controls the voltage swing o...
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JP4348241B2 |
A load control circuit enabling miniaturization of a brightness adjustment system. The load control circuit includes a variable resistor for generating a reference potential. A first duty signal generation circuit connected to the variab...
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JP4341914B2 |
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JP2009232059A |
To configure a triangular wave oscillation circuit with a smaller number of circuit elements.In the configuration that a charging operation and a discharging operation to a capacitor 22 are switched by the output signals of a comparator ...
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JP2009171449A |
To provide a PWM signal generating circuit advantageous for reducing a chip area by enabling an inverted PWM signal to be generated, without providing an inverter circuit, even in single-end input constitution.A PWM signal generating cir...
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JP2009165012A |
To prevent oscillation at an unwanted frequency and to materialize stable oscillation at an expected frequency.An oscillation circuit 100 comprises an oscillation element 110, an inverting amplifier 120 and a status holding circuit 130. ...
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JP4287884B2 |
A ramp voltage generation circuit suitable for an A/D converter preventing a variation in a digital value obtained by an A/D conversion operation. The circuit comprises a stabilization voltage source Vref, an operation amplifier AMP1 hav...
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JP2009118362A |
To improve accuracy of an A/D converter by a voltage to frequency conversion method.The A/D converter includes a voltage to frequency conversion circuit having a voltage controlled oscillator 24 with two equivalent saw tooth wave generat...
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JP2009111839A |
To provide a triangular wave generator capable of setting an upper-limit voltage and a lower-limit voltage of a triangular wave without rapidly charging/discharging a capacitor while being synchronized to an external synchronizing signal...
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JP2009100352A |
To reduce the distortions of the output signal of a digital amplifier by eliminating the distortions of triangular wave signal.An integrating part INT of a triangular wave signal generator TRI is provided with a fully differential amplif...
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JP2009094568A |
To generate triangular waves of which a wave-height value is adjusted to a desired value.A triangular wave generation circuit comprises: a comparator CMP1 for comparing a triangular wave signal TRI taken out of the terminal of a capacito...
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JP4237618B2 |
A combined gate drive and current sensing circuit for a 3-phase AC PWM inverter system which uses gate signal information to reconstruct complete motor phase current for providing a linear motor phase current feedback signal.
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JP2009044646A |
To suppress the increase of the charging/discharging current of the capacitor of a voltage-controlled oscillation circuit even when increasing its oscillation frequency.The voltage-controlled oscillation circuit for oscillating the charg...
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JP4229804B2 |
A NMOS (34a) determines whether output voltage (Vo) exists in state of power supply voltage (Vcc). When output voltage is same as supply voltage, NMOS (37) discharges electric charge of gate of source follower (32) based on control signa...
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JP2009021912A |
To provide a CR oscillation circuit of an accurate oscillation frequency even if a threshold voltage of an MOS transistor (hereinafter simply referred to as MOS by omitting transistor) varies.A resistance 1 and a capacitor 2 are connecte...
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JP2009017556A |
To provide a frequency-variable oscillator that varies, even if the frequency of input signal is varied, the frequency of an oscillation signal, according to the varied frequency of the input signal.A frequency-variable oscillator includ...
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JP4209924B2 |
The present invention relates to an integrator comprising a first switching means, one end of which is connected to a voltage source (Vdd) outputting a predetermined voltage. Also, the integrator comprises a second switching means (SW2),...
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JP4204655B2 |
A microcomputer capable of outputting pulses in which an arithmetic processing unit outputs pulse control data according to the receiving of a trigger signal transferred from a trigger circuit, a data latch circuit latches each kind of p...
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JP2008306356A |
To generate two-phase triangular waves whose frequencies and peak values are the same, and whose phases are mutually reverse.Triangular wave oscillation circuits 102A, 102B generate two waves A and B, which are of reverse phases, respect...
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JP2008304426A |
To provide an optional waveform generator and semiconductor test apparatus that can shorten the test time and acquire analog voltage where error voltage by divergence from the linearity of an output signal of a D/A converter is accuratel...
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JP2008301042A |
To provide a self-oscillation type oscillation circuit capable of obtaining a more accurate oscillation frequency.The self-oscillation type oscillation circuit includes: a ring oscillator (1) whose oscillation frequency is varied in acco...
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