Matches 351 - 400 out of 464 < 1 2 3 4 5 6 7 8 9 10 >
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4308524 Fast high resolution predictive analog-to-digital converter with error correction  
An analog-to-digital conversion system uses a fast analog-to-digital converter having a resolution less than the system resolution to convert the difference between a previously predicted value and...
4291300 Tracking analog-to-digital converter for AC signals  
An electronic circuit is described for providing an analog-to-digital conversion system having an output "delta" format in which a pulse is produced for each defined change in the amplitude of the...
4270077 Demodulatorless synchro position sensor apparatus utilizing square wave excitation  
A synchro resolver angular position sensor provides the sine and cosine of angular position by applying a square wave excitation to the resolver stator winding. The corresponding square wave...
4264898 Analog to digital converter for electronic engine control systems  
A method and apparatus for controlling the various functions of an internal combustion engine using a program-controlled microprocessor having a memory preprogrammed with various control laws and...
4233500 Method and apparatus for providing a digital output in response to an analog input and for providing an analog output in response to a digital input  
The accuracy of the conversion of an analog signal to digital form is improved by amplifying the input signal by different factors and automatically utilizing the highest amplified input signal...
4222105 Recording apparatus including analog-digital converter  
Recording apparatus includes a plurality of analog signal generating circuits for generating various analog signals in response to which a control circuit of the recording apparatus controls...
4222077 Analog-digital conversion method, and a picture reproduction method using the same  
A method of analog-digital conversion is disclosed, wherein sub-sampling of an analog signal is performed at a certain multiple n of the basic sampling rate, wherein a discrimination signal...
4211999 Converter for converting a high frequency video signal to a digital signal  
A converter for converting a high frequency video input signal to a digital signal by detecting the peak voltages of the input signal. A video input signal fans out to a plurality of comparators of...
4204257 Numerical control resolver position measuring device  
An absolute resolver position measuring device for a numerical control apparatus that controls a machine having a plurality of movable members. A resolver is operatively connected to each movable...
4202042 Digital to analog interface for simultaneous analog outputs  
Interface circuitry for obtaining simultaneous, multi-channel analog outputs from a microprocessor, avoiding sequential addressing delays. The technique involves inserting, for each analog output...
4196358 Analog multiplexer  
An analog multiplexer connected to a plurality of input terminals selectively samples the input terminals in response to signals from a controller. The multiplexer includes a sample and ramp...
4190823 Interface unit for use between analog sensors and a microprocessor  
An improved interface circuit for use between variable voltage analog sensors which are measuring physical parameters and a microprocessor which is processing the data relating to such parameters....
4160243 Asynchronous reversible analog to digital converter  
An asynchronous signal processing circuit device having an A-D converter and a D-A converter in which a single ladder voltage generating circuit is commonly or jointly used by changing over a...
4143366 Analog-to-digital converter  
An analog-to-digital (A/D) converter which is capable of encoding each one of analog signal samples occurring at a high rate, such as 40 MHz (25 ns spacing), to eight digital output bits...
4141065 Electric controller system with bumpless transfer  
An electric controller system includes a comparator at the input of a processor, the processor including a program memory, an operation control unit and a data memory. A digital/analog converter is...
4129864 High speed, wide dynamic range analog-to-digital conversion  
A wide dynamic range, wide bandwidth, analog-to-digital conversion system d method. A plurality of overlapped analog-to-digital converters are utilized in conjunction with scaling amplifiers to...
4124845 Multiplexed digital/analog conversion of plural digital signals  
Plural digital signals are converted to plural analog signals through a plurality of sample and hold circuits, there being one for each of the desired conversions, which sequentially sample a...
4091456 ROM controlled communication system  
A system in which a plurality of analog information sources appearing on a plurality of multiplexer channels are selectively scanned under control of a read only memory. The analog information is...
4091379 Analog to digital wave shaping system  
An analog to digital wave shaping system comprising, a source of analog signals, adaptive threshold circuitry coupled to said source, said adaptive threshold circuitry having an output selected as...
4077030 Sensor data input by means of analog to pulse width-to digital converter  
A system for transmitting data from remote sensors to a digital processing system is disclosed herein. The analog sensor output is converted to pulse width signals at the sensor location and...
4062005 Synchro-to-digital converter employing common processing apparatus  
Circuitry monitors a plurality of rotating shafts, and provides a corresponding plurality of binary output words each characterizing the angular position of an associated shaft. Synchro and Scott...
4050062 System for digitizing and interfacing analog data for a digital computer  
A system for digitizing and interfacing analog data from a plurality of amplitude modulated periodic signals with a computer in which an alternating reference signal is identified and sampled input...
4016557 Automatic gain controlled amplifier apparatus  
In an analog data acquisition system, used for digital treatment, analog signals of different levels received from remote locations are amplified with a selected gain before being converted by a...
4015254 Keyboard encoding circuit utilizing an A/D converter  
Various switches of a keyboard are connected with a voltage divider network to establish an analog voltage for respective switch closures. The analog voltage is stored on a capacitor and converted...
4005423 Synthetic aperture radar utilizing a low-speed analog-to-digital converter  
A radar receiver employing digital signal processing utilizes high-speed ut buffers in the form of charge coupled devices that lower the data rate to the analog-to-digital converters so as to...
3997894 Analog-to-digital converter with electro-optical coding  
An EMP resistant A/D converter having no triggered circuits, the digital code word being formed by sampling the analog function on a periodic basis, selectively quantizing the levels sampled into...
3980953 Delta modulation system employing digital frame averaging  
A delta modulator produces a digital bit stream from an input analog waveform and applies same to bit-averaging circuitry dividing the bit stream into time-frame intervals and computing the average...
3979561 Level-code encoded multiplexer  
Apparatus for multiplexing a large number of digital signals onto a few aog channels using a level code encoded multiplexer. Each digital signal to be multiplexed is assigned a unique reference...
3976869 Solid state resolver coordinate converter unit  
A computing system for performing digital sequential coordinate transformations on n dimensional vector input data referenced to a sensor system and ultimate outputting of the n dimensional vector...
3971015 Recirculating type analog to digital converter  
An analog to digital converter includes a comparator coupled to a cascade having in serial connection an analog switch, a time delay and an algorithmic coder. The algorithmic coder generates a...
3968487 Multiplexer-analog/digital conversion system  
The system includes: a number of subassemblies, each containing a set of switches connectable at their pair of inputs to different sources of analog signals and containing a multiplexer/decoder...
3940759 Analog signal processing system with correction for amplifier offset  
Low level analog signals from remote locations are amplified after being converted into two consecutive analog signals of opposite polarities and a digital system causes A/D conversion to occur in...
3889063 Multiplexed digital data communication system  
A multiplexed digital data communication system wherein analog signals received from a conventional telephone system having a plurality of channels are multiplexed at a high sampling rate and...
3883864 Analog-to-digital and digital-to-analog converter apparatus  
PCM encoder-decoder having a digital code generator which counts through a digital count during a comparison period. An analog voltage waveform generator sweeps in a non-linear manner from a...
3877023 Antiglitch digital to analog converter system  
An antiglitch digital to analog converter system is disclosed, wherein the occurrence of "glitch" (i.e., temporary swings to gross error levels in analog output that arise following rapid...
3877028 PCM encoder-decoder apparatus  
PCM encoder-decoder having a digital code generator which counts through a digital count during a comparison period. An analog voltage waveform generator sweeps in a non-linear manner from a...
3859654 ANALOG TO DIGITAL CONVERTER FOR ELECTRICAL SIGNALS  
Unknown bipolar analog signals are converted to equivalent digital signals by comparison with positive and negative reference voltages. Sampling is performed for a preselected time period during...
3846787 TIME DIVISION MULTIPLEXER EMPLOYING DIGITAL GATES AND A DIGITAL-TO-ANALOG CONVERTER  
This invention relates to a high frequency multi-channel time division multiplexer employing digital gates and a digital-to-analog converter. An analog voltage is continuously applied to one input...
3806917 DIGITAL TO SYNCHRO CONVERTER  
A digital to resolver or synchro converter in which a simple ladder network and multiplexing are used to provide highly accurate outputs at a low cost is shown. An N bit digital word representing...
3806916 ANALOG DATA ACQUISITION SYSTEM  
A system is disclosed for accessing selectively data at a plurality of points and applying data from a selected point to a suitable utilization device such as a computer or a computer-like device....
3798636 SERIES-SHUNT SWITCHING PAIR, PARTICULARLY FOR SYNCHRO TO DIGITAL CONVERSION, DC OR AC ANALOG REFERENCE MULTIPLYING OR PLURAL SYNCHRO MULTIPLEXING  
In a multiplexing converter of synchro data to digital form, a plurality of switching devices, associated control logic, and a single analog comparator are provided for specifying the octant in...
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...
3742489 SAMPLE AMPLIFIERS HAVING AUTOMATIC REGULATION OF THE AMPLIFICATION FACTOR BY DISCRETE VALUES  
In a sample amplifier having gain variable by discrete value, in which it is desired to bring the samples into a range of specific voltages by means of a suitable amplification factor, two...
3732376 TIME DIVISION MULTIPLEX CODER  
The coder disclosed has two sample and hold circuits, one of which is primarily for sampling the analog signals for even numbered input sources and the other of which is for sampling the analog...
3731279 CONTROL SYSTEMS  
A control system in accordance with this invention provides a Digital computer supervised electric control system for monitoring and controlling a plurality of separate variables each variable...
3725903 SELF-CALIBRATING ANALOG TO DIGITAL CONVERTER  
A self-calibrating analog to digital converter wherein, if the full scale reading of the converter is defined as X counts, the calibration formula takes the following form: C o = [C s - C 1 ]...
3710376 CALIBRATION OF ANALOG-TO-DIGITAL CONVERTER  
Analog signals are applied sequentially through a multiplexer and an analog-to-digital converter to a digital computer. The computer is programmed to check the zero point and the span of the...
3700871 MULTIPLE MULTIPLEXER GAIN-RANGING AMPLIFIER  
One hundred low frequency analog signal channels having a very large dynamic range may be amplified to at least half of full scale of a 14-bit analog to digital converter without distortion by an...
3699325 TIME-SHARED INSTANTANEOUS GAIN-RANGING AMPLIFIER  
One-hundred low-frequency analog signal channels having a very large dynamic range, may be amplified to at least half of full scale a 14 bit analog to digital converter without distortion by an...
3696403 LOW LEVEL CONVERSION SYSTEM  
Multiplexed analog signals are applied to the input of a sampling amplifier having a digitally controlled gain. The signals at the output of the sampling amplifier are applied to an analog to...
Matches 351 - 400 out of 464 < 1 2 3 4 5 6 7 8 9 10 >