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7613538 Compensation for distortion in contact lithography  
A method of contact lithography includes predicting distortions likely to occur in transferring a pattern from a mold to a substrate during a contact lithography process; and modifying the mold to...
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...
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...
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)....
7251290 Adaptive controller for linearization of transmitter  
A bank of complex gain elements is used to provide a step-wise approximation of an arbitrary complex-gain predistortion function for a nonlinear transmitter. The bank of gain elements is in an...
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...
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,...
6577177 Non-linear distortion generator  
An in-line distortion generator for coupling in-line with a non-linear device (NLD) produces an output signal of useful amplitude, but with low composite triple beat and cross modulation...
6525665 Electrical circuit tracing device  
An electrical circuit tracing device comprising a transmitter that includes a pocket for storing the receiver is disclosed. The transmitter further comprises a storage compartment for maintaining a...
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...
6380875 Digital ramp generator with output power level controller  
Simplifying functions representing raised sine or cosine curves to functions representing simple sine or cosine curves makes it possible to implement an electrical equivalent circuit for a ramp...
5910744 Variable delaying circuit having a nearly linear delay characteristic  
A first capacitor 7, a resistor 5, and a second capacitor 6 are connected in series between an output node A and a first power supply line 22. In addition, a first switch 8 is connected between the...
5814952 Device for correcting the ramp linearity of saw-tooth signals  
A device for correcting the linearity of ramps of a saw-tooth signal provided across a capacitor, charged by a first current source and periodically discharged at a desired frequency. The device...
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)...
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...
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...
5642066 Linear ramp generator having two voltage controlled current sources  
An ultra-linear chirp generator includes a voltage controlled oscillator (VCO) having a tuning characteristic which is naturally nonlinear, a linear ramp generator which generates a linearly...
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...
5434483 Automatic compensation circuit for the horizontal deflection of a multifrequency computer monitor  
An automatic compensation circuit for the horizontal deflection of a multifrequency computer monitor includes a transformer which has a primary winding and a secondary winding, a reverse coil which...
5424680 Predistorter for high frequency optical communications devices  
A generalized frequency dependent predistortion circuit for nonlinear optic devices such as semiconductor lasers and light emitting diodes includes a pre-filter and post-filter associated with a...
5412290 50 Hz parabolic signal filter  
A scanning waveform generator for operation at a first or a second scanning frequency comprises a source of a parabolic shaped signal having a frequency selectable between the first or second...
5367212 Geometry correction waveform synthesizer  
A geometry correction waveform synthesizer includes a plurality of DC controlled multipliers each coupled to respective sources of complimentary geometry correction signals. The DC controlled...
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...
5225714 Sawtooth waveform generator for a convergence correction circuit  
Electric charges are stored on a capacitor and then the charges are discharged so that a sawtooth wave for use in a convergence correction circuit for a display or the like is generated. When the...
4803381 Bias current compensating circuit, particularly for saw-tooth wave generators  
This circuit comprises a current source stage connectable to a capacitor which is controlled so as to alternately and periodically charge with the current fed by the source stage and discharge...
4760319 Circuit for removing unwanted slope transitions from an incoming signal  
Provided is a circuit for removing an unwanted temporal portion of an incoming signal and for differentiating that signal with respect to a reference voltage level. It includes an input for...
4739228 Electric circuit for S correction of the vertical scanning ramp in a television apparatus  
A variable-gain rectifier-amplifier with regulated voltage converts the output ramp of a ramp generator with regulating resistance of ramp amplitude into a triangular wave form with adjustable...
4728813 Timebase generator with improved linearity and recovery time  
A timebase generator includes a transistor switch performing a sweep gate function, alternately providing a current path for retrace and then disconnecting such current path to allow generation of...
4620291 Digital-to-analog converter interpolator  
A digital-to-analog converter interpolator is provided finding application, among others, as a digital ramp smoother. In the preferred embodiment, a regular input step digital ramp signal f(t) is...
4611176 Precision linear ramp function generator  
A ramp function generator is provided which produces a precise linear ramp unction which is repeatable and highly stable. A derivative feedback loop is used to stabilize the output of an integrator...
4591796 Performance predictable linearizing or function modifying circuit  
The disclosure relates to a linearizer circuit capable of substantially replicating a non-linear waveform on a piece-wise linear basis by providing a pair of circuits, one capable of reducing the...
4516036 Linear ramp voltage generator circuit  
A generating circuit for producing a linear ramp output voltage comprises an electronic switch and a ramp circuit connected to the electronic switch. The ramp circuit includes a single active...
4470025 Method and circuitry for chirped oscillator automatic frequency control  
The starting frequency and sweep rate of a chirped frequency-shift-keyed oscillator are automatically controlled for correction of long-term drift. The substantially linear swept frequency output...
4449059 Triangle waveform generator having a loop delay compensation network  
A triangle waveform generator is provided with a compensation network to eliminate the effects of frequency and amplitude errors caused by switching-control loop delays of the system. This is...
4417218 Linearizing circuit for a high frequency voltage controlled oscillator  
A circuit for linearizing the oscillator sweep output frequency signal of a oltage controlled oscillator is disclosed. The voltage controlled oscillator is driven by the output of an op amp, which...
4413237 Sawtooth wave oscillator  
A sawtooth wave oscillator is disclosed which includes a series connection consisting of a charging circuit and a first capacitor, a voltage dependent capacitor connected in parallel to the first...
4346352 Linear and logarithmic sweep control circuits for a voltage-controlled oscillator  
A sweep control circuit and method for maintaining a constant swept frequency range of a voltage-controlled oscillator when switching between linear and non-linear sweeping functions is provided....
4284906 Constant amplitude variable frequency synchronized linear ramp generator  
A constant amplitude, variable frequency, synchronized, linear ramp generr is disclosed for generating a sawtooth waveform signal, whose amplitude is independent of frequency. A capacitor is...
4149120 Circuit arrangement for linearizing the output signal of a test sensor  
A circuit arrangement for linearizing the output signal of a measuring sensor by comparing this output signal with a periodically repetitive signal which represents the measurement characteristic...
4071776 Sawtooth voltage generator for constant amplitude sawtooth waveform from varying frequency control signal  
A generator of recurrent ramp voltages in response to a pulse train. It includes a circuit for ensuring that the output voltage of the generator reaches its maximum value just prior to the...
4031411 Monolithic integrated circuit for the distortion of a saw-tooth signal  
Several solutions to the problem of making integrable the known so-called tangent correction circuit of TV receivers are provided. The solutions are: a diode-resistor matrix, a voltage-dependent...
4009399 Gated ramp generator  
A precision ramp voltage generator is provided which exhibits exceptionally small start-up aberrations and simultaneously maintains baseline stability. The perturbations in the output are corrected...
3994237 Power supply for realistic control of model railroad engines  
A power supply for realistically controlling a model railroad engine. For engine acceleration, the power supply provides an output signal having a linear ramp with pulses superimposed thereon. For...
3956642 Voltage-controlled sweep multivibrator  
A multivibrator capable of extremely high-speed operation and producing a linear sweep waveform. This multivibrator contains within the circuitry thereof a "digital" device such as a NAND gate...
3950706 Voltage sweep generator with bistable current source providing linear sweep voltages  
A voltage sweep generator provides a linear sweep voltage signal (triangular wave) between first and second magnitudes in the output circuit of an integrator driven by a control signal. The control...
3937986 Linear waveform generator  
A transistor timing ramp generator having collector, emitter and base electrodes and having a capacitor connected between collector and base, a resistance connected between base and emitter, the...
3934089 Automatic disconnect circuit for subscriber carrier telephone system  
In a disconnect circuit including a pair of transistor switches that are connected in series between associated lines of a cable pair and a subscriber carrier charging circuit for selectively...
3932817 High voltage triangular waveform generator  
A high-voltage-level Miller circuit is employed, with capacitive coupling between the input current source and the amplifying device, and between the output terminal of the amplifying device and...
3932741 Circuit to reduce harmonic distortion in a triangular wave-form function generator  
A device is disclosed for generating a triangular wave form for use in an electronic function generator. The device employs a level detector which produces a square wave output to drive a...
3909734 Reference signal generator, particularly for the control of a direct-current motor  
A reference-signal generator, particularly for the control of a direct-current motor, comprising a regulated voltage source supplying one of the inputs of a fast and sensitive comparator whose...
Matches 1 - 50 out of 176 1 2 3 4 >