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Document Title 

4101964 
Digital filter for pulse code modulation signals
A digital filter for pulse code modulation signals employs interpolation. A digital filter can handle a multiplicity of multiplexed pulse code modulation channels. 

4074281 
Method and appartus for making hard copy records of curves including curves which are mathematically described as multifunctions from periodically sampled data points
A line scan cathode ray tube (CRT) recorder generates a hard copy record of a curve from stored data representing the XY coordinates of a series of sample points along the curve. The curve may be... 

4059746 
Pulse distribution apparatus for linear interpolation in a numerical control system
An apparatus for distributing drive pulses to drive servomechanisms in a numerical control system is provided with a clock pulse generator, presettable counters respectively associated with the... 

4053754 
Recursive processing of multiple intensitymodulated scans
A recursive signal processing apparatus is disclosed which utilizes the slow fluctuations in position of a signal in a recurring intensitymodulated scan for signal enhancement by effectively... 

4031369 
Interpolation and control apparatus and method for a numerical control system
A numerical control system having both linear and circular interpolating capabilities is described. Data from a permanent storage medium such as tape are input to a preprocessor. The preprocesor... 

4031370 
Generation of mathematical functions
A method of interpolating a value of the dependent variable, y corresponding to a given value of an independent variable x, wherein y = f(x) and is described by a linear polynomial series of the... 

4020332 
Interpolationdecimation circuit for increasing or decreasing digital sampling frequency
A general purpose interpolatordecimator circuit for increasing or decreasing the sampling rate of a digital signal by a factor L/M, where L and M are integers, is disclosed. The circuit includes... 

4001565 
Digital interpolator
A digital interpolator in which a value previously stored in a program memory circuit such as an ROM is read out by addressing it with an output of a counter having a predetermined value preset... 

3997773 
Interpolating digital filter with input buffer
A nonrecursive interpolating digital filter for generating, output code works, at an arbitrary rational ratio between the input and output sampling frequencies. The input code words are entered... 

3996456 
Recursive interpolation
A system for interpolatively displaying the values of a onedimensional array of data sources is disclosed. The output signals are multiplexed and successively made available to the input of a... 

3964443 
Digital engine control system using DDA schedule generators
A first pair of DDAs for interpolating along a predetermined MAPRPMFuel schedule for an internal combustion engine and a second pair for iterpolating along a predetermined MAPTEMPENRICH... 

3943346 
Digital interpolator for reducing time quantization errors
A digital processor for discretely sampled information signals, of the type such as radar return signals and communication signals. Means are disclosed for determining the positions and values of... 

3882304 
Parametric interpolation of threedimensional surfaces
A method is described for defining complex two and threedimensional objects with a minimal amount of data. The method employs a "preprocessor" which receives the coordinate values of an ordered... 

3862404 
DEVICE FOR CARRYING OUT TWODIMENSIONAL INTERPOLATION IN CONJUNCTION WITH A FIXED WORD STORE
A device for use with a fixed word store for multidimensional interpolation of function values not stored in the store by adding stored functional support values which surround the desired value... 

3860805 
METHOD AND APPARATUS FOR PRODUCING A FAIRING CONTOUR IN NUMERICAL CONTROL SYSTEMS
A numerical control method and apparatus for directing a controlled element such as a cutting tool through a fairing contour between two normally intersecting linear displacement segments. The... 

3847349 
INTERPOLATORS
An interpolating arrangement comprises a stepper controlled to step between two computerdefined values at instants in dependence upon the difference between the values and the real time interval... 

3846625 
COMPUTING DEVICE FOR AN INTERPOLATION
A computing device for interpolation of values which is suitable for controlling operation of a car engine includes a digital memory for memorizing the data of selected independent variations of... 

3813529 
DIGITAL HIGH ORDER INTERPOLATOR
A system is disclosed herein which is designed to generate the value for dependent variables of given mathematical functions when provided with corresponding independent variables as inputs... 

3806713 
METHOD AND APPARATUS FOR MAXIMIZING THE LENGTH OF STRAIGHT LINE SEGMENTS APPROXIMATING A CURVE
In a system having a rotational axis and a radial axis, a method and apparatus is disclosed for maximizing the length of straight line segments approximating a curve while maintaining the... 

3789203 
FUNCTION GENERATION BY APPROXIMATION EMPLOYING INTERATIVE INTERPOLATION
A method of solving a function for values of a variable when values of an independent variable are given, the method being especially valuable for use in or with a computer, an advantage being... 

3754236 
DIGITAL TO ANALOG CONVERSION APPARATUS
A digital to analog converter which improves the accuracy of reconstruction of a sampled analog signal without requiring that the sampling rate of the original signal be increased to obtain such... 

3748447 
APPARATUS FOR PERFORMING A LINEAR INTERPOLATION ALGORITHM
A linear interpolation and numerical integration system employing U, X and Y arrays for computing additional sets of X and Y points in an XY coordinate system from a number of known sets of X and... 

3725794 
INTERPOLATING APPARATUS
Interpolating apparatus for dividing time intervals of variable duration into an integral number of subintervals is shown wherein the time intervals are divided into a first predetermined number... 

3725684 
DIGITAL/ANALOG LINEAR INTERPOLATOR
An electronic calculating machine for determination of a desired output quantity z(xe,ye) related to a first input quantity xe variable within limits xo to xn and to a second input quantity ye... 

3678258 
DIGITALLY CONTROLLED ELECTRONIC FUNCTION GENERATOR UTILIZING A BREAKPOINT INTERPOLATION TECHNIQUE
The specification discloses a digitally controlled function generator wherein breakpoint information for a given function is developed by a digital computer. A search function is employed by... 

3676655 
DIGITAL FUNCTION GENERATOR FOR TWO INDEPENDENT VARIABLES WITH INTERPOLATION
A digital logic circuit for providing an output signal which is a function of a pair of independent variables is disclosed. The disclosed embodiment includes a twodimensional function generator... 

3644723 
CIRCULAR INTERPOLATION SYSTEM
An operational integrator comprising an integrand register and an accumulator register, a pulse code unit for supplying four series of pulses and a carry pulse to transfer the numbers stored in... 

3639736 
DISPLAY WINDOWING BY CLIPPING
A computation system is disclosed, as for interpolating lines with specific application to the selection of a portion of a line which is to be presented in a fragmentary display. The system as... 

3617716 
METHOD AND ARRANGEMENT FOR EXTRAPOLATION OF A CONTINUOUS FUNCTION
Extrapolated values of a continuous function of an independent variable are omputed for a given extrapolation range of the independent variable by measuring the function at predetermined values of... 

3573797 
RATE AUGMENTED DIGITALTOANALOG CONVERTER
This disclosure describes a rate augmented digitaltoanalog converter for computed timedependent data. The converter produces a smooth continuous function by digitally incrementing functions... 

3532864 
LINEAR INTERPOLATION FUNCTION GENERATION


3521270 
METHOD AND APPARATUS FOR THE INTERPOLATION OF A PERIODIC SEQUENCE OF INFORMATION


3518513 
POSITION CONTROL DEVICE COMPRISING AN INTERPOLATING UNIT


3412240 
Linear interpolater


3372268 
Pulse generator


3308279 
Error compensation circuit for control system


3287545 
Automatic control system


3247365 
Digital function generator including simultaneous multiplication and division


3246130 
Extrapolation computer using reversible counter for trajectory measurement


3155821 
Computer method and apparatus


3109092 
Digital curve computer for use in controlling the path of a work tool or work piece


3063047 
Firing point locator system
