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8467623 |
Invariant pulse latency coding systems and methods systems and methods
Systems and methods for processing image signals are described. One method comprises obtaining a generator signal based on an image signal and determining relative latencies associated with two or... |
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7822800 |
Apparatus and method for performing a calculation operation
The invention provides an apparatus and a method for performing a calculation operation with at least one input signal consisting of signal sections, wherein each signal section of said input... |
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7498852 |
Phase error correction circuit for a high speed frequency synthesizer
Circuits, methods, and apparatus for adjusting an NCO output in order to provide a signal that is phase-locked to a reference signal. This is particularly beneficial where the frequencies of the... |
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7103622 |
Direct digital synthesizer with output signal jitter reduction
A method and apparatus for reducing unwanted harmonics in direct digital synthesizer (DDS) output. The method comprises the steps of providing a set of k phase-shifted clock signals, examining, in... |
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5798949 |
Traffic safety prediction model
The present invention provides an Traffic Safety prediction Computer Program (TRAF-SAFE) and sub-models for predicting the number of accidents, injuries and fatalities expected annually at an... |
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5457660 |
Reset signal generation circuit having a function for protecting write data
In a reset signal generation circuit for generating a reset signal to a CPU in accordance with an external clock signal, illegal operation or loss of write data during a write period is... |
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5453932 |
Device and method for detecting and elimination of spurious ultrasonic ranging echoes
An ultrasonic ranging device and method for positioning a working implement relative to a datum is disclosed. The ultrasonic ranging device is coupled to the implement and is capable of... |
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5357447 |
Rate conversion apparatus
A first clock signal of fl in frequency is converted into a second clock signal having a frequency of f2=(n/m) f1. The first clock signal is converted by a tank circuit (12) and a converter (13)... |
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5343386 |
Apparatus for making electronically-produced postcards and method of operating same
An apparatus housed in a booth for automatically producing printed postcards incorporating a self-portrait of the user integrated into a pictorial background including a cash-receiving device, a... |
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5012437 |
Digitally controlled oscillator
A digitally controlled oscillator (DCO) includes a binary full adder having a first set of inputs coupled to input lines, a second set of inputs, a set of summation outputs and a carry output. A... |
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4933890 |
Digital frequency synthesizer
The edge timing of a clock-synthesized numerically controlled oscillator (NCO) waveform of a desired frequency is corrected to coincide more precisely with that of an ideal waveform of the desired... |
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4815018 |
Spurless fractional divider direct digital frequency synthesizer and method
A direct digital frequency synthesizer including a counter circuit for receiving input signal pulses and for providing a corresponding output signal after receiving a number of input signal... |
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4563741 |
Rotational angle signal generating system for internal combustion engines
A rotational angle signal generating system for an internal combustion engine produces its signal from the a.c. signal generated by a magneto-generator mounted in the ignition distributor of the... |
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4473885 |
Frequency dividing ratio setting device for programmable counters
A frequency dividing ratio setting device capable of successively changing the frequency dividing ratio of a programmable counter and further changing the changed portion of the frequency dividing... |
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4468624 |
Programmable synchronous digital delay line
A synchronous digital delay line that can be programmed by variable delay increments to independently delay the leading and trailing edges of a digital signal and that can be utilized to provide a... |
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4432065 |
Method and apparatus for generating a pulse train with variable frequency
For generating a pulse train having a variable frequency, in a first step a referance frequency is divided by the combined factor Dr =Np, wherein N and p are integers. Thus, an auxiliary pulse... |
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4410954 |
Digital frequency synthesizer with random jittering for reducing discrete spectral spurs
A digital frequency synthesizer for synthesizing a selected frequency or a library of preselected frequencies in which a selected phase increment is fed at a clock rate to an adder and... |
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4354412 |
Adaptive metronome for an automatic rhythm generator
A sequence of timing signals is generated having a time spacing corresponding to the average spacing between successive actuations of a control switch. The system automatically starts a new... |
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4355402 |
Data modem false equilibrium circuit
Circuitry for detecting and correcting false equilibrium conditions generated in data modems by sudden changes in gain of an associated transmission system including a false gain detector which... |
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4348743 |
Single chip MOS/LSI microcomputer with binary timer
A microcomputer which is implemented by MOS/LSI techniques on a single semiconductor chip is disclosed. The computer includes a data processing system having control logic means, means for... |
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4310802 |
Logical waveform generator
Input logical data is sequentially divided by a data dividing circuit for each time slot into n data trains, of which each data block has an n time slot length. A clock signal which can be... |
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4303985 |
Analog voltage to pulse rate or analog to frequency converter
An apparatus for changing an analog input voltage into a pulse rate particularly characterized by (1) the absence of substantial voltage across switching mechanisms, (2) the generation of pulses... |
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4293917 |
Non-linear function generator
A function generator for producing digital data which represent a function of the time interval between two events and in which the digital data have a non-linear relationship to the time... |
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4255793 |
Apparatus for generating nonlinear pulse patterns
Apparatus for generating a plurality of nonlinear pulse patterns from a single linear pulse pattern. A first counter counts the pulses of the linear pulse pattern and a second counter counts the... |
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4234929 |
Control device for a phase lock loop vernier frequency synthesizer
Disclosed is a device for controlling the selection of divider factors in a vernier frequency synthesizer employing a pair of phase lock loops coupled through a mixer to supply a synthesized... |
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4225793 |
Arrangement for monitoring a current network
An arrangement for monitoring a current network to which is connected at least one self-excited or separately excited three-phase synchronous machine which is operatively connected e.g. to a... |
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4217655 |
Clock circuit having a swept output frequency
Disclosed is a digital circuit for generating a swept clock frequency having a linear rate of change. A constant frequency signal is divided by a counter signal representative of the inverse of a... |
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4213186 |
Pulse interpolation system
The prior D.D.A. (Digital Differential Analyzer) having an integrand register, a remainder register and an adder for pulse interpolation has been improved by attaching some new units to the same,... |
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4166249 |
Digital frequency-lock circuit
A digital frequency-lock circuit has a binary rate multiplier connected between a fixed frequency oscillator and an output terminal to modify the oscillator output signal in accordance with a... |
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4150432 |
Frequency counter and method
An averaging frequency counter for determining the frequency of recurrence of input signals has an event counter for counting a number of the input signals, a gate counter for counting a number of... |
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4093850 |
Ratemeter which calculates the reciprocal of the period
A fast response digital ratemeter is disclosed which calculates the reciprocal of every period between consecutive event pulses. A period counter is continuously incremented by clock pulses of a... |
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4089060 |
Digital logarithmic apparatus
Digital apparatus for approximating the logarithmic equation of the form: X= W Logz (Y)+ K where W and K are selected constants, employs basically a three counter, one comparator logarithmic... |
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4084246 |
Pulse generator
A pulse generator for producing two output pulse trains A and B where the total number of pulses in both train A and B over a fixed time period remains a constant. The two pulse trains are derived... |
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4074358 |
Test set for measuring jitter distortion of data pulses
Time jitter distortion of data pulses is measured by a test set which recovers a median leading and a median trailing edge from the data pulses, defines a point of time reference at the midpoint... |
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4053879 |
Fail safe digital code rate generator
A digital code rate generator comprises a digital number generator driven by a clock running at an appropriate frequency. Preferably the digital number generator is arranged to simultaneously... |
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4049953 |
Complex pulse repetition frequency generator
A complex pulse repetition frequency generator for producing a pulse repeion frequency (PRF) signal having programmable stagger intervals. The device consists of a clock for selecting one of a... |
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4017719 |
Binary rate multiplier with means for spacing output signals
Circuit and method for spacing the output signals from a binary rate multiplier by adjusting the rate of the internal clock of the binary rate multiplier to a value approximating (N+1) times f0... |
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3999049 |
Synthesizer of multifrequency code signals
Synthesizer of multifrequency signals for telephone sets, each multifrequency signal being formed by two concomitant sinusoidal signals of different basic frequencies, said frequencies forming... |
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3998088 |
Testing apparatus for incremental shaft encoder
An apparatus for testing an incremental shaft encoder in which the encoder is placed upon a rate table together with a gyroscope to permit coincident rotation. Every time the shaft of the... |
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3996453 |
Totalizer
A totalizer is provided which is adapted to accept a variety of process signals at the input thereof, which process signals will be in analog form. The signals are then first converted into... |
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3989961 |
Bidirectional reset integrator converter
A bi-directional reset integrator converter, including a common reset pulse generator operable by input currents of either direction, is disclosed. The reset pulse generator creates a current flow... |
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3943341 |
Computing apparatus
Computing apparatus for producing a digital output equal to ##EQU1## where N1 is a preset digital factor and V1 and V2 are analogue input signals. The apparatus includes a pulse generator arranged... |
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3943454 |
Digital logic circuits for producing digital sum and difference frequencies
The present invention provides means for deriving a single frequency signal from logic signals A(t) and B(t) by first applying the logic signals to a combining arrangement, which includes logic... |
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3911258 |
Pulse interpolation system
A pulse interpolation system with high speed operation and improved linearity is described. An interpolation pulse train having "one" in all bit places is applied to the axis with the largest... |
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3909596 |
System for determining processing losses or gains
Method and apparatus for providing substantially instantaneous reading and recording of processing losses and gains from a continuous liquid chemical process, such as refining of vegetable oil.... |
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3894218 |
Variable inverse period timer
A variable inverse period timer computes the inverse period between events, where the repetition frequency of the events can vary greatly. Where the repetition frequency of the events is... |
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3885140 |
Densitometer
A vibration densitometer including a closed loop electromechanical oscillator for vibrating a fluid immersible vane. A digital output directly proportional to density is achieved through a unique... |
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3885142 |
Binary rate multipliers
An output binary rate vector is provided in response to a selected input number by generating a plurality of individual binary rate vectors substantially concurrently. Each of the individual... |
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3852580 |
HYPOTENUSE CORRECTION CIRCUIT
A feed rate generator for use in numerical control systems producing drive signals causing a movable member to move in at least two axes of motion at a predetermined velocity along a predetermined... |
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3851158 |
METHOD AND APPARATUS FOR DERIVING THE MEAN VALUE OF THE PRODUCT OF A PAIR OF ANALOG QUANTITIES
Each of a pair of time dependent input analog quantities is sampled at a predetermined rate, and the successive samples are encoded into first and second separate trains of binary pulses wherein... |