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8115563 |
Pulse width modulation circuit and voltage-feedback class-D amplifier circuit
The frequency characteristic of a voltage-feedback class-D amplifier circuit for driving an output load is improved. A triangular-wave correction circuit which compensates a gradient of a...
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8058939 |
Slope compensation circuit
A slope compensation circuit includes an oscillator for generating a first clock signal having a reference frequency, a ramp signal generator for generating a ramp signal having a duty ratio of...
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8040165 |
Semiconductor integrated circuit
Provided is a semiconductor integrated circuit including: a differential driver that is disposed between a first power supply and a second power supply and drives differential input signals to...
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7999523 |
Driver with improved power supply rejection
A technique reduces effects of power supply noise on a signal output by an integrated circuit output driver circuit powered at least partially by an external power supply. An integrated circuit...
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7919998 |
Precision triangle waveform generator
A triangle waveform generator is set forth that comprises a capacitive element, a regulator, and a control circuit. The regulator is configured to charge the capacitive element in responsive to a...
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7916098 |
Plasma display apparatus and method of driving the same
A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel including a scan electrode, and a scan driver that supplies a...
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RE41926 |
Output circuit for adjusting output voltage slew rate
The present invention discloses an output circuit that is able to adjust the output voltage slew rate and avoid short-circuit current, comprising: a control circuit for receiving an input data and...
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7834592 |
Circuit for generating triangular waveform having relatively short linear rise time and substantially long linear fall time
A circuit includes a pulse transformer having primary and secondary windings. An oscillating waveform is applied to the primary winding to induce an oscillating waveform at the secondary winding. A...
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7816955 |
Ramp generator and circuit pattern inspection apparatus using the same ramp generator
The present invention provides a ramp generator capable of appropriately setting a rise starting point of an output voltage of a ramp waveform and an output voltage at the time of stable output. A...
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7746129 |
Ultra low power servo-controlled single clock ramp generator with amplitude independent to clock frequency
A low power servo-controlled single clock ramp generator (100) includes a fast switched comparator (102), charge pump (110) and voltage-to-current converter (120) connected to provide a feedback...
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7642820 |
Triangle wave generator and spread spectrum control circuit thereof
A triangle wave generator with function of spreading frequency spectrum is provided. The triangle wave generator includes a switch control circuit, a current generator, an integrator, and a spread...
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7639051 |
Circuit arrangement for rectifying the output voltage of a sensor that is fed by an oscillator
In the case of a measuring device having a sensor supplied from an oscillator for a non-electrical variable and having a circuit arrangement downstream of the sensor for rectifying the output...
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7629762 |
Motor driving circuits
A motor driving circuit comprising first and second input voltage source sets, a reference voltage source, first and second voltage level shift units, a logic unit, and an output voltage terminal....
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7622972 |
System and apparatus for generating ideal rise and fall time
A system for generating an ideal rise or fall time includes: a first current source, for providing a first current; an adjustable capacitive component, coupled to the first current source, for...
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RE40971 |
Direct drive programmable high speed power digital-to-analog converter
A current source is provided according to the present invention. The current source includes N current sources configured in a parallel arrangement, wherein N is at least two. Each of the N current...
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7538586 |
Transmitter for a controlled-shape switched signal on a communication line
The transmitter comprises a signal generator including a capacitor producing the switched signal to be applied to the line. The capacitor is charged by a charging current in response to an input...
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7474135 |
Circuit for differential signals
A method and integrated circuit for the transmission of differential signals with a signal and a complementary signal is disclosed. For trimming the edge steepness of the signal with that of the...
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7362149 |
Zero crossing detection and correction upon a distorted primary AC power line voltage
Zero crossings for a non-symmetrical VIN may be determined by first amplifying and clipping VIN to create a non-symmetrical square wave whose zero crossings are those of VIN. A selected polarity...
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7355461 |
Waveform generating circuit and spread spectrum clock generator
A waveform generating circuit is provided which generates a modified triangular wave signal suitable for being input to a frequency modulation circuit such as a voltage-controlled oscillator (VCO)....
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7339406 |
Sawtooth wave generating apparatus, a method of generating sawtooth wave, a constant current circuit, and a method of adjusting amount of current from the same
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...
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7212045 |
Double frequency signal generator
A double frequency signal generator to which a synchronization signal having a duty cycle of 1% to 999% is inputted. The synchronization signal is used for triggering of a switching component at...
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7046062 |
Method and device for symmetrical slew rate calibration
A device and method for calibrating a slew rate is disclosed. The slew rate may be for a driver of a bi-directional buffer. A driver outputs a signal having a frequency. A receiver is coupled to...
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6906563 |
Generating a waveform having one signal level periodically and different signal levels in other durations
Generating a waveform having one signal level periodically and different signal levels in other durations. Two input signals are received, one having a desired constant level and another having...
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6838916 |
Method of generating a voltage ramp at the terminals of a capacitor, and corresponding device
A ramp capacitor CAP1 has a first terminal connected to a power supply voltage VBAT. A generator circuit is connected to a second terminal of the ramp capacitor and adapted to generate a voltage...
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6809563 |
Fast sweep voltage ramp generator and streak camera using same
A fast scanning voltage ramp generator including at least one chain of N two-pole avalanche transistors in series and a set of N+1 zener diodes in series between a high voltage power supply and...
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6777974 |
Arrangement and method for adjustment of the slope times for one or more drivers and a driver circuit
The invention relates to an arrangement (10) and a method for adjusting the slope times of one or more drivers (90) in such a way that the adjustment is essentially independent of external...
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6774684 |
Circuits and methods for controlling transients during audio device power-up and power-down, and systems using the same
Circuitry for ramping a voltage across a load 506 includes a charging circuit 500 for charging a capacitor 501 to generate a ramp-up wave form. Circuitry 511 selectively decouples a first driver...
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6753723 |
Synchronous buck converter with improved transient performance
A synchronous buck converter having an improved transient response during output current stepdown. The device includes series and shunt MOSFETS, a first driver circuit to turn the series MOSFET on...
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6696871 |
Circuit for controlling a power MOS transistor and detecting a load in series with the transistor
The detection of the presence of a load associated with a power MOS transistor integrated with its control circuit using a filtering time delay in generating a detection signal with respect to the...
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6661263 |
Voltage sequencing arrangements providing first and second voltages sequenced to each other in time
A voltage sequencer includes an input terminal and an output terminal and a control element connected between the input an output terminals. A capacitive element is connected between the output...
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6650153 |
Generator circuit for voltage ramps and corresponding voltage generation method
A generator circuit for voltage ramps is provided that includes a differential stage with positive feedback coupled between a first and a second voltage reference and having a first output...
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6628151 |
Self-regulating high voltage ramp up circuit
A self-regulating ramp up circuit generates a high voltage signal having a slow, smooth ramp up and reduced process and temperature variation. The circuit uses a resistor and a capacitor to control...
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6591149 |
Method for prescribing a ramp by a clock-pulse-controlled quantity
In a method for prescribing an essentially linear ramp with a prescribable slope by a quantity, and which is clock-pulse-controlled and which describes the ramp by an increment per clock interval,...
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6476654 |
Slew rate adjusting circuit
An interface circuit includes a slew rate control unit 110, a pre buffer unit 120, and a main buffer unit 130. The slew rate control unit 110 is configured as a current source circuit of the pre...
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6445233 |
Multiple time constant rectifier apparatus and method
A rectifier circuit produces an output which is a function of the magnitude of an input signal and has a controllable transient response. The circuit requires no rectification diodes. The voltage...
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6384653 |
Linearly controlled CMOS phase interpolator
Method and system for providing a signal with a controllable zero crossing time value. The system provides first and second two-sided triangular wave signals, identical but shifted by a selected...
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6307414 |
Slew rate/propagation delay selection circuit
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a first output signal having a predetermined slew rate and propagation delay in...
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6265921 |
Circuit configuration for shaping slew rate
An electric circuit configuration for shaping the slew rate of a pulsed output voltage occurring at an output terminal and for detecting a short circuit at the output terminal, having: a switchover...
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6239637 |
Method and apparatus for transmitting an electrical signal featuring pulse edge compression
A signal transmission device including an input for receiving an input electrical signal containing a succession of pulses. The input signal has a high data rate, preferably in excess of 10...
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6194935 |
Circuit and method for controlling the slew rate of the output of a driver in a push-pull configuration
A circuit and method are disclosed for controlling the slew rate of the output voltage of a driver in a push-pull configuration. The circuit includes a capacitive element and a current generator...
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6191628 |
Circuit for controlling the slew rate of a digital signal
A circuit for selectively controlling the slew rate of a signal on a data line. A capacitor is connected at one end to a common terminal of a power supply and to a switching circuit. The switching...
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6147526 |
Ripple regulator with improved initial accuracy and noise immunity
A DC--DC converter having an input node receiving an input voltage VIN and generating an output voltage VOUT. A reference voltage generator provides a voltage VREF and a hysteresis voltage...
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6147533 |
Data communication receiving elements
A data communication receiving element includes a photo-receiving element for receiving an external light signal and for converting the light signal to a current signal. It further includes an...
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6133766 |
Control circuit for the current switch edges of a power transistor
A battery-charging electronic device comprises a current generator adapted to supply a charging current to a battery and a controlled current edge switch having a circuit for controlling the...
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6111440 |
Circuit for generating interleaved ramped voltage signals having uniform, controlled maximum amplitude
A circuit having multiple channels for generating multiple ramped voltage signals (preferably of a type useful in an interleaved PWM dc/dc converter) such that each ramped voltage signal has a...
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6040724 |
Bus driver circuit having adjustable rise and fall times
A bus driver circuit for high speed data transmission includes a plurality of delay blocks connected in series one to another which varies a rise and fall time of an input signal in order to shape...
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5949363 |
Piecewise linear signal generating circuit
A time-dependent piecewise linear signal generating circuit includes a first circuit responsive to a trigger signal to provide a number of time region signals each corresponding to a separate...
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5945857 |
Method and apparatus for duty-cycle correction
Correction of a duty-cycle is performed for use with a divide-by-two phase-splitter to increase precision of the duty-cycle of an incoming local oscillator signal in order to provide more precise...
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5914621 |
Charge balanced ramp with improved signal linearity
A ramp circuit repeatedly generates a substantially linear ramp signal. Ramp switch junction capacitance that otherwise causes a nonlinear output is compensated to improve signal linearity and...
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5912593 |
IC (current-capacitor) precision oscillator having frequency and duty cycle controls
A precision oscillator circuit having a wide adjustable operating frequency range and an adjustable duty cycle. The precision oscillator use a window comparator circuit for monitoring a voltage of...
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