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JP3215108B2 |
A variable width pulse generator includes a plurality of logic stages which are coupled in cascade. Each stage is arranged to select one of a plurality of clock signals of differing phase applied thereto responsive to particular bits of ...
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JP2001268359A |
To realize a circuit for generating a PWM signal capable of obtaining arbitrary multiple resolution for a reference clock, or controlling rising and falling in an arbitrary timing.This PWM circuit for generating a PWM signal upon receivi...
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JP2001255948A |
To provide a adjustment device for comparator reference voltage capable of relatively easily, quickly and highly accurate adjustment a comparator reference voltage, and preventing the influence of the hysteresis characteristics of a comp...
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JP2001257537A |
To provide a modulation circuit capable of obtaining a high output by easily improving the distortion characteristic of a modulator.A distortion correction component obtained by inverting a distortion component generated by the modulator...
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JP3210127B2 |
PURPOSE: To make the voltage pulse width converting circuit durable to environmental conditions in a wide range by eliminating the need for a transmission line of another system and another power source, feeding a signal corresponding to...
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JP2001244798A |
To realize a print with a low density by increasing gradation number of the density.Comparison is conducted only for a period, when each ramp wave has superior linearity by comparing a level of an analog signal with a signal level for th...
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JP2001168720A |
To provide an improved device and a method for generating digital control signals.This device is provided with an oscillator 10, a 16-bit data latch 20 provided with a clock input terminal 22 connected to the output terminal 11 of the os...
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JP3176613B2 |
2.1 In known drive circuits, a separate semiconductor switch which can be switched on or off is allocated to each pixel electrode. 2.2 According to the invention, the drive circuit is operated in multiplex mode. In this mode, the sel...
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JP2001507884A |
An apparatus which outputs very low duty cycle pulses of a consistent width. It is common to use a pulse width modulator as part of a liquid crystal display dimming system to vary the brightness. In the typical pulse width modulating sch...
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JP3176055B2 |
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JP2001127608A |
To provide a modulation circuit that has less adjustment positions in comparison with that of a conventional circuit or the like employing a varactor element, reduces the cost and can generate a modulated signal including a frequency mod...
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JP2001127636A |
To provide a PWM signal generator that can increase setting resolution of an output value without changing a frequency of an operating clock and degrading an output responsiveness. An output object value in (n+p) bits where the setting i...
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JP2001505738A |
The invention relates to a transit modulator for jittering a signal (Uin) comprising a memory (3), a clock generator (2) connected to said memory (3) and generating a jitter free input clock (T) as well as a further clock generator (5) c...
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JP2001111396A |
To surely make PWM frequencies fixed in a digital PWM waveform generating device for outputting a PWM waveform. This digital PWM waveform generating device is provided with a digital triangle wave generating means 1, a digital threshold ...
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JP3147231B2 |
An image processing apparatus includes an input unit for inputting an image signal, a conversion unit for converting the image signal input from the input unit and outputting the converted image signal, and an output unit for outputting ...
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JP2001060856A |
To generate a signal with a modulated pulse width, which is provided with improved resolution and a comparatively wide value range by outputting a signal width in accordance with a pulse duty factor to be previously set. When the pulse d...
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JP2001053594A |
To provide an excitation waveform generator which is constituted entirely of a synchronization circuit, is easily integrated into ASIC (application specific integrated circuit) and is easily accelerated. This excitation waveform generato...
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JP3135253B2 |
A signal processing device for processing an information signal is arranged to form a frequency-modulated information signal by frequency-modulating the information signal inputted, to form a correction signal according to the frequency-...
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JP3131975B2 |
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JP2001024748A |
To easily design frequency characteristics of a telephone line interface by easily adjusting the low group frequency component and the high group frequency component of a DTMF signal and to eliminate the need for D/A converters to reduce...
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JP3124179B2 |
PURPOSE: To obtain a pulse width modulation circuit in which radiation is effectively suppressed with a simple configuration while securing the S/N and a broad dynamic range. CONSTITUTION: The pulse width modulation circuit is provided w...
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JP2001001568A |
To provide a pulse modulating device capable of improving bit resolution of a pulse width modulating signal to be generated and an exposure device capable of making an exposing time highly accurate.A PWM signal 48 is raised by inputting ...
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JP3114145B2 |
A drive circuit for a liquid crystal display converts a display information signal to an n bit gray scale code to control the brightness at a prescribed pixel. A counter receives the m most significant bits of the n bit gray scale code a...
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JP3112065B2 |
A pulse width modulation circuit includes a transistor pass element alternately switched on and off by an oscillator and connecting a power source to a load. Current through the transistor pass element is compared to a reference signal b...
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JP2000312470A |
To provide a plurality of SW regulators to operate without malfunctioning. In a PWMSW control circuit for keeping the output voltage constant, a sample-and-hold circuit 20 is inserted between bleeder resistors 11, 12 for detecting the ou...
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JP3107164B2 |
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JP3105381B2 |
PURPOSE: To provide a QPSK modulating device whose circuit configuration can be simplified, and phase noise characteristic can be satisfactory by constituting a first local oscillator of a frequency synthesizer whose step size is small. ...
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JP2000299707A |
To provide a communication signal generating circuit, a communication signal output circuit and a communication circuit that can simultaneously generate, output and transmit a communication digital signal and a communication analog signa...
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JP3098531B2 |
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JP3100148B2 |
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JP2000278105A |
To realize oscillation of a signal with a higher frequency over a broad band by configuring a delay circuit without the need for a feedback circuit. A current source 2 supplies a current in response to amplitude of an input signal to a c...
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JP3089646B2 |
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JP2000236223A |
To obtain an amplifier which has reduced number of defects of a gradient amplifier for nuclear spin tomograph by constituting it so that the switching behavior of a digital pulsewidth modulator simulates the switching behavior of an anal...
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JP2000232345A |
To provide an amplification digital pulse width modulation power controller while keeping digital data as digital signals without making them analog. This controller generates a full bit clock (c) within the word clock (b) of digital dat...
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JP2000232346A |
To provide a pulse width modulation waveform generation circuit for reducing a circuit scale and also reducing power consumption. This pulse width modulation waveform generation circuit is provided with a ring oscillator 1a for which 64 ...
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JP2000216642A |
To accurately adjust a gradient amplifier of a nuclear spin tomograph, by giving a accurate end stage switching time interval to current flow which is generated in a induction load connecting with a out put of a power amplifier. In the p...
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JP3070977B2 |
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JP3069322B2 |
To reduce high frequency noises produced in a control circuit which controls a power supplied to a load. A pulse width modulator has a quasi-random number generator and introduces a quasi-random offset delay 605 into an active high pulse...
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JP3066215B2 |
A circuit for a pulse width modulating a sensor (12) has been provided. The circuit includes a first switch (22) for alternately coupling the sensor between first and second supply voltage terminals. The circuit also includes second (24)...
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JP2000193899A |
To provide a DMD(Digital Micro-mirror Device) small in power consumption. In a micro-mirror capable of modulating the analog pulse width and its method, a capacitor 406 of each micro-mirror element stores the charge to express one pictur...
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JP3060585B2 |
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JP3061112B2 |
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JP2000183708A |
To provide a pulse output device where a count overflow can be prevented and an extension of a control pulse width can be avoided.A free-run counter 5 counts a clock pulse to obtain a count X. A coincidence comparator 7 compares a compar...
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JP2000174599A |
To provide a PWM type amplifier having a higher duty cycle than that of a conventional amplifier.The PWM amplifier has power transistors(TRs) 11, 12 connected in a state of a totem pole and a bootstrap capacitor 40 that gives a bias to a...
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JP3053658B2 |
A voltage to pulse-width conversion circuit includes a logarithmic clock generator for receiving a reference frequency signal and generating a logarithmic clock signal TCK; a counter for counting the number of clock pulses of the logarit...
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JP3051335B2 |
To provide a modulator for driving a magnetron and a microwave tube which overcome the limit of an ordinary modulator, by installing a synchronized pulse generator which generates pulse width timing and synchronized amplitude command. A ...
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JP3029625B2 |
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JP3028841B2 |
A digital circuit includes a flip-flop for latching N-bit digital data for a predetermined period of time, a counter for cyclically counting N-bit binary data, a first adding circuit for adding n of LSBs of the N-bit digital data and n M...
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JP3026412B2 |
PURPOSE: To highly accurately provide the PWM output signals of a prescribed duty factor with simple circuit constitution. CONSTITUTION: Reference frequency signals S51 are counted in a counter 54, the digital signals of plural bits corr...
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JP3023680B2 |
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