Matches 351 - 379 out of 379 < 1 2 3 4 5 6 7 8


Match Document Document Title
4521861 Method and apparatus for enhancing radiometric imaging  
Disclosed is a method and apparatus for enhancing target detection, particularly in the millimeter wave frequency range, through the utilization of an imaging radiometer. The radiometer, which is...
4517550 Analog to digital conversion method and apparatus  
An analog to digital conversion method and apparatus includes the use of a scaling circuit 15 to scale the magnitude of an analog signal D applied to ADC 4 to within an acceptable input range. A...
4497030 N-way summing network characterization system  
A system for quasi real-time computer aided characterization of symmetrical -way microwave power combining structures which utilizes a network analyzer to measure scattering parameters of said...
4494212 Variable gain amplifier  
A variable gain amplifier with digital output is described. The amplifier is useful for but not limited to input range selection in chart recorders or other measuring instruments. To minimize the...
4490803 Temperature compensation of a resistance bridge circuit  
A resistance bridge circuit is temperature compensated, for both zero error and sensitivity, over a predetermined temperature range by connecting a first compensating resistance in series with one...
4464723 Digital gain control system  
A variable gain control system for a digital signal is provided in which the digital signal addresses a digital memory to produce an output signal representative of the addressing signal modified...
4445279 Magnetic course detector  
Disclosed is a magnetic course detector capable of accurately detecting the bearing of the course of a traveling body independently of the position a magnetic bearing sensor is installed in the...
4414638 Sampling network analyzer with stored correction of gain errors  
An improved sampling network analyzer is described, in which a stored memory, for example, a programmable read-only memory (PROM), is utilized to store the discrepancies between various...
4398261 Device for measuring the level of a variable signal with logarithmic conversion  
A device for measuring the level of a variable signal delivered by a sensor. It comprises a series of attenuators, receiving the signal from the sensor, a squaring and integrating chain for...
4397029 Least squares adaptive lattice equalizer  
Equalizer apparatus is provided which includes a number of successively cled lattice stages, each of the stages comprising a selected configuration of adjustable electrical components, the input...
4375692 Least squares lattice decision feedback equalizer  
An improved equalizer receives the output of a data transmission channel at he first stage of a number of successively coupled lattice stages which are each made up of a selected configuration of...
4375072 Self-calibrating overcurrent detector  
Circuit for detecting a fault current in an installation where the load (RL) varies. Total current (IS) is converted into a voltage (VS). During an initialization cycle, means such as counter (9),...
4364027 Calibration apparatus for analog-to-digital converter  
A calibration apparatus for analog-to-digital converter or transient recorder including both analog and digital sections is disclosed. A built-in calibrator automatically calibrates the gain and...
4356731 Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like  
Time gain compensation is provided in an ultrasonic scanner by storing a digital code in memory representing the desired signal gain for intervals of time during the reflected wave. Gain...
4312044 Tuning apparatus  
Tuning apparatus wherein the instantaneous deviations of a measured sound frequency from a reference sound frequency are averaged to display a mean deviation, thereby to improve the stability of...
4300196 Method of adjusting circuit components  
Disclosed are methods of controlling the adjustment of a machine-adjustable component in a circuit wherein a feedback factor relates a change in a monitor parameter to a compensating change in the...
4222107 Method and apparatus for automatically calibrating a digital to analog converter  
A system for automatically calibrating a main digital to analog converter (DAC) includes first and second adjustment DAC's, an offset DAC, a difference amplifier, an analog to digital converter...
4214300 Three term (PID) controllers  
A method and apparatus for adjusting a variable parameter of a dynamic system in response to a signal representative of the system performance so as to optimize system performance with respect to...
4140874 Automatic compensating circuit  
Circuitry for establishing a variable voltage reference for a circuit which amplifies and shifts an input signal. When a known input signal is applied to the circuitry, a counter is incremented to...
4112491 Direct readout real time physiological parameter analog computer  
A medical electronic diagnostic device particularly suitable for determining and displaying segmental pulsatile flow of a patient. Means are provided for stabilization of a calibrated segmental...
4068228 Multiple channel amplifier  
An amplifier for an electromagnetic radiation receiver has a plurality of amplification channels for the determination of angular separations, especially for use in self guiding equipment in...
4009376 Method and apparatus for measuring material thickness  
A non-contacting gauge for measuring thickness deviations of strip material including alloyed metal strip. The gauge includes a radiation source for emitting a beam of material-penetrating...
3905229 Temperature compensating system  
A flow meter system including a temperature sensitive transducer is provided for referring to a selected reference base or standard temperature flow measurements made of fluids at temperatures...
3725685 SYSTEM FOR ADJUSTING THE VALUE OF A RESISTANCE TO A PREDETERMINED VALUE  
The value R of a resistance is adjusted to a predetermined value Ro, R being modified by oxidation of the resistance by the flow therethrough of an electrical pulse train, by at least two read-in...
3515343 CORRECTION ENTRY CIRCUIT  
3435422 SELF-ORGANIZING SYSTEM  
3171023 Analogue computer more particularly utilizable for calibrating a measuring device  
3095735 Aerodynamic computer and method  
2951200 Calibration indicator  

Matches 351 - 379 out of 379 < 1 2 3 4 5 6 7 8