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7626430 |
Triangular-wave generating apparatus incorporating capacitor
In a triangular-wave generating apparatus including an output terminal adapted to output an output voltage, an incorporated capacitor connected to the output terminal, a first variable current...
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7583113 |
Sawtooth oscillator having controlled endpoints and methodology therefor
A controlled endpoint sawtooth waveform generator and methodology is implemented by a circuit that uses charge sharing between capacitors to produce a sawtooth having one or both endpoints that are...
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7557622 |
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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7554370 |
Method and system for synchronizing phase of triangular signal
A multiplicity of electronic devices is provided to generate triangular wave signals variable between an upper and lower limit voltages by charging or discharging capacitors. One of the triangular...
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7514971 |
Pulse width modulation current adjustment apparatus
The present invention provides a PWM current adjustment apparatus including a triangle wave generator ( 8 ) for generating a triangle wave voltage signal, a comparator ( 9 ), an FET ( 10 ), a power...
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7508243 |
Triangular wave generation circuit
An accurate intermittent triangular wave signal without waveform distortion is generated by a triangular wave generation circuit 1 including a rectangular wave generation circuit 111 for...
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7403049 |
Triangular wave generation circuit
A first constant-current source supplies a charging current to a second terminal of a first capacitor in which a first terminal is grounded. A first terminal of a second capacitor is grounded, and...
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7391242 |
Sawtooth waveform generator
A sawtooth waveform generator includes an operational amplifier that generates a ramp signal. The ramp signal charges a capacitor connected between the output of the operational amplifier and the...
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7388413 |
Ramp generator with fast reset
An efficient ramp generator uses a reversing switch array to couple a timing capacitor in alternating polarities between an input terminal and an output terminal of an operational amplifier to...
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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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7352216 |
High speed ramp generator
A high speed ramp generator is presented. The high speed ramp generator is advantageous over the prior art because it provides a ramp response without the delay incident with a simple integrator...
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7348812 |
Multiphased triangular wave oscillating circuit and switching regulator using it
To oscillate and output multiphased triangular waves with a designed waveform shape, wave crest value, and phase relationship. This multiphased triangular wave oscillating circuit has two...
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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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7336110 |
Differential amplitude controlled sawtooth generator
A dual differential sawtooth signal generator includes a first sawtooth voltage generator that has a first capacitor and a second capacitor that are alternately charged with a feedback control...
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7317362 |
Oscillator circuit and oscillation control method
An oscillator circuit is disclosed that includes a first oscillation part configured to output a first oscillation output by charging and discharging a first capacitor, and a second oscillation...
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7282970 |
Device and method for generating one-shot bipolar waveform
In the present invention, a device and method for generating one-shot bipolar waveforms are provided. The provided device can generate bipolar sawtooth waves, bipolar sinusoidal waves and bipolar...
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7271632 |
Controlled slope voltage ramp generator
A ramp generator is provided that includes an amplifier, first and second transistors, a variable resistive load having a control electrode, and a capacitor. The amplifier has an inverting input...
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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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7158067 |
Analog to digital converter using sawtooth voltage signals with differential comparator
An analog to digital converter includes a resistor-divider network including a plurality of resistors, an arbel channel circuit configured to generate a voltage sawtooth signal as an output, a...
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7154308 |
Driver circuit with gradual voltage ramp up and ramp down
A driver circuit is disclosed comprising an amplifier, a data DAC, and a voltage control mechanism (VCM). During a power up sequence, the VCM provides gradually increasing voltage signals to the...
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7116138 |
Ramp signal generation circuit
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...
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7102432 |
Class D amplifier
A class D amplifier capable of compressing a dynamic range and reproduction by changing on a real time basis a modulation ratio to a non-linear ratio in accordance with amplitude of an input...
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7078942 |
Driving apparatus for generating a driving current using PWM
A current driving apparatus includes a first square wave generator ( 100 ), a second square wave generator ( 200 ), an FET (Field Effect Transistor) ( 3 ), and a power supply ( 9 ). The first...
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7064587 |
Output Buffer
A low-noise output buffer for a digital signal is based on an analog amplifier having bandwidth greater than the switching rate of the digital logic signal. A converter circuit converts the digital...
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7002381 |
Switched-capacitor controller to control the rise times of on-chip generated high voltages
A switched capacitor controller accurately controls the rise time of an on-chip generated high voltage. An on-chip charge pump is used to generate a high voltage (VPP) from an external power supply...
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6956413 |
Ramp generator for image sensor ADC
A ramp generator includes a resistance ladder supplied with a constant current. Switches are closed in sequence by a shift register to provide a stepped ramp output. The constant current is...
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6930520 |
High bandwidth feed-forward oscillator
A high bandwidth, feed-forward oscillator generates a ramp or sawtooth voltage for controlling the operation of a pulse width modulator-based, switched DC power supply circuit. The oscillator is...
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6850097 |
Inverter
AC to DC inverters that are formed from electronic switches, such as MOSFETs, that are controlled by gating pulses obtained from comparators. The comparators compare a varying signal against two...
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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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6791405 |
Triangular wave generating circuit used in a Class-D amplifier
The integrating circuit of the triangular wave generating circuit includes an operational amplifier and a capacitor. Switch elements are alternatively turned ON and capacitors are alternatively...
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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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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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6603335 |
Ramp circuit to reduce spectral regrowth of power amplifiers
A circuit for controlling a high frequency power amplifier for amplifying a signal for wireless transmission is disclosed. The circuit provides a control signal to the power amplifier at an output...
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6600349 |
Waveform generator, display device and electronic apparatus
A waveform generator comprising an input terminal connected to one terminal of a first capacitor, a first switch connecting the other terminal of the first capacitor to one terminal of a second...
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6552622 |
Oscillator having reduced sensitivity to supply voltage changes
An oscillator includes a first sawtooth waveform generator for generating a first sawtooth waveform having a selectively started ramp portion and a second sawtooth waveform generator for generating...
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6549081 |
Integrator/ comparator control of ring oscillator frequency and duty cycle
A control circuit for a ring oscillator uses an integrator and a comparator. The integrator receives a square wave signal as an input and provides a triangular wave signal as an output. The...
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6456127 |
Adaptive pulse frame rate frequency control for minimization of electro-magnetic contamination in integrated switching amplifier systems
A system and method of integrating switching amplifiers into systems with low amplitude front-end tuners to eliminate shielding and EMI filtering associated with signals, power and ground. An...
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6448752 |
Switching regulator
In the present invention, an amplitude of a triangular wave from a triangular wave generating circuit is controlled depending on a power source voltage and further the current value for charging...
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6389548 |
Pulse run-length measurement for HF data signal by dividing accumulated phase difference between first and second zero-crossings by single-cycle range using multiple cycle range sawtooth waveform
A system and method for accurately measuring a pulse run length in a high frequency (HF) data signal while utilizing a low analog-to-digital conversion (ADC) sampling rate. Four bits are added to...
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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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6384645 |
Integrated generator of a slow voltage ramp
An integrated circuit for producing a small slope voltage ramp includes a circuit for generating a periodic triangular current signal, and a circuit for generating, at the beginning of each period...
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6373306 |
Clock generator with programmable two-tone modulation for EMI reduction
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate an output signal that ramps between a first and second frequency in response to (i) a...
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6356125 |
Ramp generator
A ramp generator for use in a video mixing system to produce various transition effects between edited video frames. The ramp generator produces a ramp signal R according to the equation R=Ah+Bv+C....
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6339349 |
Method and circuit for comparator-less generation of ramped voltage having controlled maximum amplitude
A circuit for generating a ramped voltage having controlled maximum amplitude (e.g., for use in a switching controller), and a method for generating such a ramped voltage without use of a...
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6278301 |
Circuit and method for modulating the base frequency of a waveform generator
An improved waveform generator (10) permits digital spectrum spreading by employing circuitry for controlling the charging and discharging of a load capacitor (24) to alter the generator's base...
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6211746 |
Integration method and integration circuit offering improved signal-to-noise ratio, and voltage-controlled oscillator and frequency-voltage converter employing integration circuit
Disclosed are an integration circuit capable of substantially raising the ratio of a current to a capacitance, I/C, and voltage-controlled oscillator and frequency-voltage converter which employ...
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6194936 |
Pulse generator provided with a duty-factor limiting function
In a pulse generator, a sawtooth-shaped wave generator circuit generates a sawtooth-shaped wave by charging and discharging a capacitor. The sawtooth-shaped wave is fed to a comparator that...
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6188261 |
Programmable delay generator and application circuits having said delay generator
A programmable delay generator comprises a first ramp wave generator and a second ramp wave generator, each having the same structure as each other, each of them operating with external common...
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6169433 |
Method and apparatus using feedback to generate a ramped voltage with controlled maximum amplitude
A method and circuit which employs negative feedback to generate a ramped voltage having well controlled maximum amplitude. In preferred embodiments, the invention is an integrated circuit (or...
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