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6163190 |
Hysteresis comparator circuit consuming a small current
A hysteresis comparator circuit and a waveform generating circuit reduce a power consumption of a DC/DC converter so as to improve a power consumption efficiency when the DC/DC converter is...
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6121805 |
Universal duty cycle adjustment circuit
A duty cycle control circuit that consumes lower power and smaller silicon area, and is less susceptible to noise or jitter. In one embodiment, the invention includes a divide-by-two circuit that...
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6121802 |
Method and circuit for generating triangular waveforms opposite in phase
A circuit and a method generate first and second triangular waveforms opposite in phase to each other. The circuit includes a capacitor having a first plate coupled to a first output at which the...
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6114916 |
Oscillation apparatus
An oscillation apparatus is provided with a signal input unit for supplying a pulse sequence consisting of pulses sequentially continuously occurred; a state quantity generating unit for generating...
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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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6094077 |
Dynamically controlled timing signal generator
A dynamically controlled timing signal generator includes a source of a controlled current, a timing signal generating circuit coupled to the controlled current source for generating the timing...
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5973522 |
Current injected ramp with reduced recovery time background of the invention
A ramp circuit discharges an output capacitor to generate a substantially linear ramp signal, current injection is used to stabilize the ramp's output, reducing overshooting and ringing. With...
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5969557 |
Delay circuit, oscillation circuit and semiconductor memory device
A delay circuit having standby state and active state and designed to output at least one signal obtained by delaying an input signal. The delay circuit comprises a storage circuit and at least one...
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5946053 |
Image encoder and subcarrier signal generator
An image encoder and subcarrier signal generator. The present invention uses a system clock signal to generate a first subcarrier signal and a second subcarrier signal with a phase-delay of 90°...
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5929671 |
Waveform generator
A novel waveform generating for generating a waveform having symmetrical rise and fall times. The waveform generator of the present invention includes a first current source, a second current...
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5920212 |
Control-type continuous ramp converting apparatus and method therefore
Control-type continuous ramp converting apparatus and method therefore. The present invention provides real-time processing of neurons in the neural network, easy implementation and reduction of...
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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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5808484 |
Method and apparatus for detecting changes in a clock signal to static states
An integrated detection circuit (10) linearly charges capacitors (14) and (16) over time in response to particular states of an input signal (12). Outputs from the integrated detection circuit (10)...
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5804999 |
Appliance AC power control apparatus
An apparatus for controlling an electrical appliance coupled with an output terminus and configured to operate in response to an alternating input signal, such as input AC power. The apparatus...
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5763963 |
Circuit arrangement for monitoring a control circuit
A circuit arrangement for monitoring a control circuit, which has a driver transistor with an inductive load and a second transistor in a circuit branch parallel to the inductive load, includes an...
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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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5714897 |
Phase-shifted triangle wave generator
A signal generator generates a reference signal, centered about a reference voltage and having a predetermined period. The signal generator also generates output signals P and Z. The output signal...
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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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5585753 |
Sawtooth generator and signal interpolating apparatus using the same
A sawtooth generates a sawtooth wave having a high response speed and good linearity with a simple arrangement in converting a change in phase of an input signal into a linear level change. A...
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5585752 |
Fully integrated, ramp generator with relatively long time constant
A circuit for dividing a reference current is composed of a number n of transistors connected in cascade, in a Darlington configuration, between current generator and a fractionary current output...
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5574392 |
Asymmetrical ramp generator system
An asymmetrical ramp generator system for a pulse width modulator includes a complementary clock circuit; a first symmetrical dual ramp generator, responsive to the clock circuit, for generating...
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5541543 |
Regulating device for a telephone loud-speaker
A fixed impedance load is provided with a signal having a variable frequency F from a line capable of supplying a variable available power. The device comprises a pulse width modulator that...
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5506477 |
Method of sensing the rms value of a waveform
A method of sensing the rms value of a phase chopped sinusoidal electrical waveform including combining an input signal representative of the waveform with an auxiliary signal in a combining...
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5502419 |
Pulse width modulation signal generation and triangular wave signal generator for the same
A triangular wave generator circuit having a triangular wave generator unit for generating a triangular wave signal, and a comparator for comparing the generated triangular wave signal with a...
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5502410 |
Circuit for providing a voltage ramp signal
A circuit (10) for generating a voltage ramp signal (V RAMP ) having minimum amplitude variation over a large frequency range has been provided. The circuit includes a comparator (40) for comparing...
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5483154 |
Apparatus for detecting signal frequency and controlling indicating device
An apparatus and a method for discriminating the frequency of an input signal and for providing a binary output signal. The binary output signal can be used to control an indicating device and/or...
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5477174 |
Ramp generator
A ramp generator has an integrator, which provides a ramp output, and a counter, which counts a clock signal during the rise period. The counter and clock are arranged so that when the actual rise...
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5442357 |
Radar transponder
A control circuit of a rader transponder produces pulses when the radar transponder detects a radio wave from a search radar. The pulses are sent to a sweep signal generator in which sawtooth waves...
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5438245 |
High-voltage generating circuit
A high-voltage generating circuit for use in a CRT display apparatus has a horizontal drive circuit which is supplied with a horizontal frequency signal synchronous with a horizontal synchronizing...
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5438291 |
Controlled delay digital clock signal generator
Controlled delay digital clock signal generator, characterised in that it comprises means (I5, I6, I7, I8, I9, I10, IT7, IT8, IT9, IT10, C4) to generate from a clock signal (CK) and its...
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5430392 |
Clock system and method for reducing the measured level of unintentional electromagnetic emissions from an electronic device
A clock system and method for reducing the measured level of electromagnetic emissions, measured by a measuring device employing a C.I.S.P.R. quasi-peak detector from an electronic device having...
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5424664 |
Direct digital synthesizer with adjustable clock frequency
An adjustable digital synthesizer has frequency increments of a selected step size. The adjustable digital synthesizer includes a digital accumulator having N stages. The digital accumulator counts...
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5424666 |
Control circuit for slowly turning off a power transistor
A control circuit for slowly turning off a solid-state power transistor, particularly for inductive loads, comprising means for limiting the load current flowing through the switch, and timing and...
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5420525 |
Low switching noise output buffer
The switching noise generated by a data output buffer is greatly reduced by "precharging" the output node to an intermediate voltage during a system's "dead" time. This is done with a precharging...
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5418501 |
Sawtooth oscillator
A sawtooth oscillator includes a current source having an output coupled to a first capacitor for supplying it with a charge current (I). A discharge circuit discharges the first capacitor during a...
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5394020 |
Vertical ramp automatic amplitude control
A vertical ramp generator includes a voltage controllable charge current source and a switched discharge current source coupled across a ramp capacitor. A pair of comparators coupled to first and...
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5387882 |
Switched capacitor charge pump and sawtooth oscillator using same
Charge pump including: a capacitor (4) which includes a first capacitor terminal (2) and a second capacitor terminal (8), a discharge switch (20) for discharging the capacitor (4) by the closing...
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5359244 |
Gate drive circuit for a MOS power transistor
An improved gate drive circuit for a MOS power transistor utilizes a dual gate drive circuit configuration. The first gate drive circuit operates to quickly turn on the MOS power transistor. After...
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5347176 |
Analog ramp generator with digital correction
An analog ramp signal is used to control the frequency of a swept radio-frequency (RF) test oscillator. The analog ramp signal is generated by applying a fixed reference voltage to an analog...
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5300821 |
Power controller
A power controller capable of controling electric loads accurately and stably is described, which is to regulate the power supply of the electric load and to reform it to be rectangular electric...
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5283515 |
Automatic calibration system for a ramp voltage generator
An automatic calibration for a ramp voltage generator includes a ramp voltage generator circuit responsive to a clock signal for providing a ramp voltage during a ramp voltage period; a comparator...
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5283476 |
Waveform generator
This invention relates to a waveform generator used in a CRT display unit or the like, and to an apparatus for generating intended saw-tooth waveforms and parabolic waveforms under control of a...
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5281870 |
Current controller
A current controller includes a first MOSFET of P type connected at a drain to a first node, at a gate to the input terminal and at a source to a power supply, a second MOSFET of N type connected...
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5276357 |
High efficiency quasi-square wave drive circuit for switching power amplifiers
A drive circuit generates a quasi-square wave for use in switching power amplifiers by supplying square wave signals which are 180° out of phase, but otherwise identical, to the respective control...
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5189313 |
Variable transition time generator
A variable transition time generator has a differential emitter follower circuit that has a push-pull signal at the inputs for driving each end of a timing capacitor. An independently variable...
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5120984 |
Sawtooth generator with two-step discharge
A sawtooth generator for an oscilloscope which provides an accurate DC voltage control after flyback of the sawtooth voltage. The sawtooth generator includes a balance circuit in the control loop...
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5025172 |
Clock generator generating trapezoidal waveform
An implantable cardiac defibrillator employing a switched capacitor filter stage having charge steering resistors connected in series with corresponding switched capacitors that are coupled to a...
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5015960 |
Method of generating a voltage with a triangular wave form
A method for generating a voltage with a triangular waveform which is independent of frequency. Two oppositely-phased voltages with sawtooth waveforms are added together in an adding circuit. These...
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4978866 |
Ramp circuit for control loop
A ramp circuit for a control loop which receives a signal from a controller and sends a signal to a controllable means to limit the slew rate of the controller signal. A capacitor functions as a...
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