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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 V IN may be determined by first amplifying and clipping V IN to create a non-symmetrical square wave whose zero crossings are those of V IN . A selected...
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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 CAP 1 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...
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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...
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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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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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6147526 |
Ripple regulator with improved initial accuracy and noise immunity
A DC--DC converter having an input node receiving an input voltage V IN and generating an output voltage V OUT . A reference voltage generator provides a voltage V REF and a hysteresis voltage...
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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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5886554 |
Slew-rate limited differential driver with improved skew control
Slew-rate limited differential drivers are useful for reliable data transmission on longer un-terminated cables with longer stub lengths. Slew-rate limit can be achieved by the ratio of a constant...
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5883535 |
Slew rate controllable amplification circuit
An amplification circuit is composed of a differential operational amplifier internally containing a current source circuit and having an inverted input connected to an output thereof through a...
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5841305 |
Circuit and method for adjusting duty cycles
A circuit provides a duty cycle adjustment through a gate delay for operation at various output voltage levels. The delay may be provided through an OR gate and an AND gate that will generally...
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5825223 |
Technique for controlling the slope of a periodic waveform
A circuit for forming a substantially periodic signal having a linear relationship between amplitude and time over a portion of its period, wherein a slope in the linear portion is controllable. A...
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5825218 |
Driver circuit including slew rate control system with improved voltage ramp generator
A voltage ramp generator for a driver circuit is provided to give an output that is highly linear between zero and a maximum voltage has a combination of current sources or generators for charging...
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5801560 |
System for determining time between events using a voltage ramp generator
A system for determining the time between the receipt of two different sils, includes a voltage ramp generator which generates a time dependent voltage signal upon receipt of a timing pulse at a...
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5760644 |
Integrated circuit timer function using natural decay of charge stored in a dielectric
A semiconductor integrated circuit to determine a passage of time that may include a time during which no electrical power is supplied to the circuit is disclosed. The circuit has a timing device...
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5748017 |
Method and apparatus for determining linearity of a ramp signal
An improved system and method of determining the linearity of a ramp signal, including a ramp generator (11) for generating a ramp signal and a vernier delay (15) to provide scan stop signals where...
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5717350 |
Degenerated differential pair waveform builder
A degenerated differential pair waveform builder has a single ramp generator control circuit and a plurality of differential pairs. A trigger input is generated and input to the ramp generator...
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5677644 |
Ramp generating structure for producing color graphics
A graphics engine is disclosed which can be used in a color desktop publishing system. The graphics engine accepts 32-bit RGBM data and performs pixel level calculations under computer control to...
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5663667 |
Switched leading edge replacement for current sense signal
A method and circuit for reducing the leading edge spike in a current sense signal. The current sense signal is a measure of the current through a switched power device controlled by a switching...
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5642067 |
Variable slew rate pulse generator
An integrated circuit pulse generator for per pin testing of electronic circuits. The pulse generator allows for independent adjustment of the slew rates of the rising and falling edges of the...
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