| Document |
Document Title |
|
JP2007159128A |
To provide a low-latency and wide-bandwidth method and system for converting numeric digital values into pulse density modulated analog output signals.The present invention relates to a method for converting a digital signal into a pulse...
|
|
JP2007150525A |
To provide a noise generating apparatus with a comparatively simple configuration whereby a bandwidth of a noise signal can be varied.The noise generating apparatus includes: a first signal generating section for generating a first signa...
|
|
JP3916762B2 |
To obtain a PWM drive control circuit in which spike current can be suppressed surely upon turning a plurality of output circuits on. The PWM drive control circuit comprises output circuits 101, 201 being connected with respective induct...
|
|
JP3918777B2 |
To provide a pulse width modulation circuit capable of highly accurate pulse width modulation by raising the resolution of a pulse width without enlarging a circuit scale. The pulse width modulation circuit is provided with a ring oscill...
|
|
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...
|
|
JP2007096410A |
To provide a pulse signal generator in which a duty ratio of pulse output is controlled easily to a predetermined value.The pulse signal generator comprises: a waveform shaping circuit WFS capable of converting an AC signal ASG into a pu...
|
|
JP2007096376A |
To provide a load drive method and a load drive apparatus capable of reducing an input offset voltage for a dead band interval.The load drive method sets a drive signal and a negative feedback amount to zero, attaches an offset correctio...
|
|
JP3897598B2 |
To surely start an A/D conversion in combining the specified ON and OFF of a predetermined PWM signal, in an inverter control semiconductor in which the pulse width of a PWM signal is controlled based on a digital value in an A/D convert...
|
|
JP3899074B2 |
Disclosed is a digital PWM input D class amplifier by PWM negative feedback. The amplifier includes: digital modulation part for modulating PCM signal of input audio to PWM signal; pulse width generating and correcting part for comparing...
|
|
JP2007074190A |
To improve the waveform of the output voltage of a triangular wave generating circuit.A first constant current source 10 supplies charging currents to the second terminal of a first capacitor C1 whose first terminal is grounded. The firs...
|
|
JP2007074181A |
To provide an inexpensive pulse signal output signal for saving a power.A pulse signal output circuit is provided with a capacitor C1, a fixed current circuit (which is configured of a voltage regulator 2 and a current mirror circuit con...
|
|
JP3892956B2 |
To prevent overaction of a meter indicator at the time of muting in measuring jitter of a quantized signal. An input signal SIN is converted to a quantized signal S2 in a binarizing circuit 2, and jitter-detected by a jitter-detecting ci...
|
|
JP3888565B2 |
To perform pulse density modulation more accurately than a conventional manner in a pulse density modulating device. It is possible to establish linearity between corrected pulse density modulation waveform data SK and its DC component a...
|
|
JP2007504754A |
A pulse width modulator includes at least one input for receiving an input signal and pulse width modulation circuitry for generating a pulse width modulated stream and another pulse width modulated stream. The pulse width modulated stre...
|
|
JP2007049463A |
To provide a pulse-width modulation circuit having a new constitution capable of being applied to a multichannel type audio device or the like, and using a monostable multivibrator.The pulse-width modulation circuit pulse-width modulates...
|
|
JP2007034839A |
To stabilize source voltage by reducing spikes generated in the source voltage when switching operating modes of the integrated circuit and to prevent malfunction of an IC in switching a mode to an operating mode at the time of inspectio...
|
|
JP2007036310A |
To enhance response to alteration of set data in a pulse output unit generating a signal having a pulse width set by the set data.In the pulse output unit, a match output EQ is outputted from a match circuit 13 when the count of a counte...
|
|
JP2007028455A |
To provide a pulse width modulation circuit in which oscillation is prevented from being stopped by turning inputs of two output elements into high levels.When a detection means 23 detects that power supply voltages VB supplied to invert...
|
|
JP3874145B2 |
To apply an amplifier circuit, a modulation circuit, a demodulation circuit, a transmitter and a receiver to an IC card that inputs/outputs various data e.g. in a non-contact state and to a reader/writer that communicates with the IC car...
|
|
JP2006352269A |
To provide a pulse width modulation circuit in which oscillation operation is started forcibly when the inputs of both inverter circuits INV1 and INV2 go high and oscillation operation is stopped.The pulse width modulation circuit compri...
|
|
JP2006352398A |
To provide a delay circuit capable of generating a stable and short delay time.The delay circuit includes: a first capacitor; a first current source; a first switch for applying a prescribed voltage to the first capacitor when an input s...
|
|
JP3863844B2 |
To provide a driving device capable of driving a stepping motor with low noise and vibration. A reference signal generating part 110a generates a reference signal VCTA continuously changing in a level and indicating a current limit value...
|
|
JP3863133B2 |
To suppress the waveform distortions of an output signal and the influence due to the EMI in a signal amplifier circuit. The signal amplifier circuit comprises an inverter circuit 10, composed of p-channel and n-channel transistors, refe...
|
|
JP3860191B2 |
To provide a pulse modulating circuit that can suppress a leak of an RF signal inputted to an amplifier to a bias circuit and applies a DC pulse signal with a narrow pulse width to the amplifier. The pulse modulating circuit of the prese...
|
|
JP2006340333A |
To reduce a carrier component caused by spectrum spreading even if a carrier frequency is low, and to prevent an audio signal from being deteriorated even if this clock is applied to a PWM system digital amplifier.An output frequency of ...
|
|
JP2006340375A |
To provide a self-oscillating circuit for driving high side and low side switching devices (50, 52) such as MOSFET connected in half-bridge configurations.This circuit alternately turns on switching devices (50, 52) by providing alternat...
|
|
JP2006333174A |
To provide a clock generating device and semiconductor integrated circuit device capable of effectively reducing an EMI (electromagnetic emission interference) by using a spread spectrum clock signal even in the case of using a high-spee...
|
|
JP2006527569A |
A high resolution pulse width modulation (PWM) or voltage controlled output (DCO) generator is disclosed. The resolution is increased over that of the circuit clock by delaying the generated signal through a series of delays, all of whic...
|
|
JP3851325B2 |
To provide a variable square-wave drive device which controls square wave by using feedback control and bias control. The variable square-wave drive device is provided with; an oscillation part (120) for generating a clock pulse; a frequ...
|
|
JP2006313958A |
To provide a full digital amplifier for an audio amplifier or the like, wherein a carrier frequency in pulse width modulation is allowed to be variable to suppress concentration of electromagnetic noise radiation spectrums at a particula...
|
|
JP2006525750A |
The present invention includes a system that has been developed to vary the starting and stopping of a pulse train of arbitrary phase without glitches, spurious pulses, or spurious change in duty cycle. This is accomplished by a system f...
|
|
JP2006303863A |
To change a period and a duty ratio timely as desired without controlling the timing of setting the period and the duty ratio with a CPU.The pulse signal generating device includes a means 1 for storing two or more periods, a means 2 for...
|
|
JP3839081B2 |
To provide an oscillator capable of slowly recovering oscillation frequency to an original state or executing oscillation at a frequency disturbed to some extent. An activity value determining part 15 calculates the current activity valu...
|
|
JP2006295802A |
To provide a pulse control apparatus capable of performing PFM control without dropping a switching frequency.In a PFM control section 27, a series of control processes of performing A/D conversion on a feedback signal of a feedback tran...
|
|
JP3833941B2 |
To provide a switching signal generator which has its output noise peak decreased and its quantization error reduced and generates an excellent switching signal whose output contains no dither signal. The switching signal generator which...
|
|
JP3835274B2 |
To provide a switching amplifier capable of amplifying high-bit digital data, without requiring a high performance from a pulse modulator circuit and switching elements. The switching amplifier comprises a means for dividing N-bit data i...
|
|
JP3831032B2 |
To reduce the number of required circuits, to improve the calibration of the resolution and the resolution of edge positions by using a comparator connecting to a counter to provide an output of a pulsizing output signal when a pulse per...
|
|
JP3825638B2 |
A high voltage linear current sense integrated circuit includes a differential amplifier circuit that can amplify a differential signal in the hundreds of millivolts near the power supply. In addition, a constant current using opposing m...
|
|
JP2006246266A |
To provide a data transfer circuit for simultaneously transferring data and a synchronizing clock on a single transmission line.In order to perform m-channel and n-bit (m, n: positive integers) data transfer, a pulse width signal (PWM si...
|
|
JP2006245877A |
To solve the problem that, since an increase and decrease in data before and after an input signal are not considered in a conventional PWM system, a noise component generated with respect to a change of the input signal cannot be contro...
|
|
JP3817529B2 |
To provide a method for controlling the transmission of a super-wideband position modulation pulse signal with high precision. In this method, a pulse signal is constituted so as to be involved in a time window. A control signal which co...
|
|
JP2006520113A |
A circuit and method for expanding the pulse width of a signal based on the input signal's pulse width. A circuit generates a delay equal to the pulse width of the input signal for both a SHIFT and OUT signal, which are out of phase with...
|
|
JP3806710B2 |
To provide a PWM buffer circuit, provided in the speed control circuit of a fan motor for enlarging a duty cycle range applicable to an applicable frequency range of a PWM signal of a control signal. This PWM buffer circuit includes a du...
|
|
JP2006518143A |
An electronic circuit has a programmable logic cell with a plurality of programmable logic units that are capable of being configured to operate in a multi-bit operand mode and a multiplexing mode. The programmable logic units are couple...
|
|
JP3803437B2 |
To provide a means independently of a power supply voltage that sets a frequency characteristic of the pulse width modulation system driver to be flat or optional. An input terminal 1 is connected to ground by a lag lead filter consistin...
|
|
JP2006196149A |
To provide a pulse generator capable of varying a pulse width by a power supply voltage, and a sense amplifier using the same.A reference current generation section generates a reference current according to a reference voltage and a blo...
|
|
JP2006195958A |
To use an existing ASIC and a similar sensor generally requiring comparatively high power in a state that power is limited.This method for managing electric power consumed by a circuit capable of outputting a signal is provided with step...
|
|
JP3800415B2 |
To provide a high-speed pulse-width modulation circuit, and to provide a rare gas discharge lamp lighting device using it. An oscillation circuit oscillates at a predetermined oscillation frequency determined by a capacitor CT and a resi...
|
|
JP3782312B2 |
To provide a semiconductor integrated circuit device that can reduce the pulse width with a delay smaller than a delay of a logic gate circuit. The semiconductor integrated circuit device includes an integrated circuit section including ...
|
|
JP2006140587A |
To provide a PWM signal generating circuit and a PWM control circuit capable of easily revising the duty ratio and preventing the effect due to a change in ambient temperature or the like.A voltage level Vb at a connecting point B betwee...
|
