| Patent Number |
Title Of Patent |
Date Issued |
| 6417671 |
Arc fault circuit breaker apparatus and related methods |
July 9, 2002 |
| A circuit for detecting arc faults and over-currents includes two overcurrent detection circuits and a ground fault circuit referenced to a single ground and configured to receive power from a single power supply. Each over-current detection circuit includes a Hall effect current sensor |
| 6407465 |
Methods and system for generating electrical power from a pressurized fluid source |
June 18, 2002 |
| A pressurized fluid system provides electrical power to a load and includes a fluid motor, a generator, an energy storage device and a controller. The system supplies fluid to the fluid motor, which provides a generator with power producing a voltage used to supply power to a load and pr |
| 6392464 |
Wide bandwidth circuits for high linearity optical modulators |
May 21, 2002 |
| Wide bandwidth compensating circuits are disclosed for compensating for the nonlinearity of other circuits placed in cascade therewith over a relatively wide bandwidth, particularly for high linearity optical modulators, in which first and second versions of a signal are generated ha |
| 5579014 |
Parallel correlator for global positioning system receiver |
November 26, 1996 |
| A correlator for identifying global positioning satellites includes an antenna at a central location for receiving signature signals from a plurality of the satellites. Each received signal is converted from analog to digital form. A filter is employed to correlate each digital signal |
| 5578877 |
Apparatus for converting vibratory motion to electrical energy |
November 26, 1996 |
| An apparatus for convening vibratory motion along a predetermined vibration axis to electrical energy comprises an enclosure having first and second opposite walls substantially parallel to one another. A magnet carrier structure in the enclosure also has first and second opposite walls |
| 5568301 |
Optical communication system with secure key transfer |
October 22, 1996 |
| An optical communication system includes a first and a second optical communication assembly that are coupled together via an optical coupling medium. Each optical communication assembly includes a respective time delay unit; an optical pattern imager coupled to the time delay unit; a |
| 5565867 |
Distributed analog to digital converter with optical links |
October 15, 1996 |
| A distributed delta-sigma analog-to-digital (A/D) converter is partitioned between an ultrasonic probe and an imaging console which are coupled to each other by optical links. The ultrasonic probe houses an integrator for receiving an analog input signal and generating an integrated anal |
| 5491486 |
Mobile tracking units employing motion sensors for reducing power consumption therein |
February 13, 1996 |
| A mobile tracking unit capable of operating in a power-starved environment for a vehicle tracking system includes a navigation set for generating data corresponding to a respective vehicle position. The navigation set is periodically energized at a selected activation rate F.sub.G while |
| 5436442 |
High temperature photodetector array |
July 25, 1995 |
| An optical detection system includes an array of photodetectors, each of which is positioned for receiving light and converting the light into an electrical signal. A plurality of high pass filters is positioned with each one of the high pass filters electrically coupled to a respective |
| 5419276 |
Single-crystal diamond of very high thermal conductivity |
May 30, 1995 |
| Single-crystal diamond consisting of isotopically pure carbon-12 or carbon-13 has been found to have a thermal conductivity higher than that of any substance previously known, typically at least 40% higher than that of naturally occurring IIA diamond. It may be prepared by a method c |
| 5357337 |
High speed interferometer fourier transform spectrometer including a weighted capacitive matrix |
October 18, 1994 |
| An interferometer Fourier transform spectrometer, having increased speed, is capable of performing a Fourier transform in parallel, in analog form, using a weighted matrix. The spectrometer includes a linear detector array responsive to an interferogram. The detector array is coupled to |
| 5349954 |
Tumor tissue characterization apparatus and method |
September 27, 1994 |
| An instrument for characterizing tumor tissue includes a broad-band light source, a monochromator for filtering collimated light from the broad-band light source, a scanner for scanning the monochromator through a range of predetermined wavelengths, and a hollow needle including a shaft |
| 5343297 |
Charge amplifier with precise, integer gain |
August 30, 1994 |
| In an array of charge injection device (CID) detectors, integer amplification is incorporated into each respective detector of the array. The amplifier for each CID detector in the array performs multiple nondestructive readouts. This provides a gain of N amplification of the signal |
| 5258791 |
Spatially resolved objective autorefractometer |
November 2, 1993 |
| A spatially resolved map of the eye's refractive characteristics are provided by measuring the eye's refractive characteristics on a point-by-point basis across the anterior surface of the eye. This spatially resolved refraction data may be obtained subjectively by providing a refere |
| 5241310 |
Wide dynamic range delta sigma analog-to-digital converter with precise gain tracking |
August 31, 1993 |
| A delta sigma analog-to-digital architecture assures that all channels in a multi-element receiver follow the same compression and/or time-gain variation curve. This is accomplished by varying the reference voltage as a function of time so that the full scale range and associated qua |
| 5212667 |
Light imaging in a scattering medium, using ultrasonic probing and speckle image differencing |
May 18, 1993 |
| Coherent light is projected through a scattering medium. The light emerging from the medium is a superposition of a multitude of scattered wavelets, each of which represents a specific scattering path. These wavelets are projected onto a diffuse reflecting surface (the viewing plane of a |
| 5212392 |
Optical sensing apparatus for detecting linear displacement of an object and method of operation |
May 18, 1993 |
| Apparatus for sensing linear displacement of an object between first and second locations along an axis is used to sense conditions that can be made to vary displacement of an object in accordance with the condition, such as temperature, pressure and rotary motion. A light beam projected |
| 5187482 |
Delta sigma analog-to-digital converter with increased dynamic range |
February 16, 1993 |
| A delta sigma analog-to-digital (A/D) converter includes a digitally-controlled multiplying digital-to-analog converter (MDAC) in a feedback configuration. The MDAC is driven by a digital signal obtained from the output (or an intermediate output) of the A/D converter. An incremental |
| 4974920 |
Electronic holographic apparatus |
December 4, 1990 |
| The invention relates to holography and more particularly to an electronic holographic apparatus whose electrical output represents the magnitude and phase of coherent light reflected from a three-dimensional object and distributed over the aperture of the apparatus. The apparatus provid |
| 4903026 |
Architecture for high sampling rate, high resolution analog-to-digital converter system |
February 20, 1990 |
| A high resolution analog-to-digital (A/D) converter (14) and a pipelined A/D converter are used in a single system so that unknown offset and gain errors of the pipe-lined A/D converter are determined and corrected. Each stage of the pipelined A/D converter includes a flash A/D converter |
| 4896152 |
Telemetry system with a sending station using recursive filter for bandwidth limiting |
January 23, 1990 |
| Before subsampling them for transmission, telemetry data are bandwidth-limited by IIR filtering at the sending station of a telemetry system. The transmitted filtered telemetry data have attendant phase distortion that is compensated for by FIR filtering at the receiving station of t |
| 4843473 |
Charge injection device with low noise readout |
June 27, 1989 |
| A charge injection imaging device comprises low bandwidth, low noise performance column amplifiers serially connected to respective charge coupled device storage lines. Image and/or noise defining electronic information signals are retrieved from the charge injection imaging device b |
| 4823230 |
Pressure transducer |
April 18, 1989 |
| A pressure transducer has a first electrode fabricated with a predetermined shape upon a substrate surface. A first insulator encloses that portion of the first electrode not enclosed by the substrate; a second insulator forms a wall to a predetermined height above the substrate surface, |
| 4780605 |
Coherent light phase detecting focal plane charge-transfer-device |
October 25, 1988 |
| A coherent light phase detecting focal plane array uses a bulk substrate of a first conductivity-type semiconductor, with a layer of the opposite conductivity-type of that semiconductor formed into an array of CTD cells each storing charge converted from optical photons impingent upon th |
| 4630299 |
Digital circuit for decoding digitized, demodulated FM stereo signals |
December 16, 1986 |
| A simple digital filter having only a single multiplier operates to extract the pilot tone from a demodulated and digitized FM stereo signal. The number of poles in the filter is chosen so that the filter output is also usable to produce a digitized representation of the carrier tone for |
| 4625293 |
Parallel programmable charge domain device |
November 25, 1986 |
| Programmable signal processing apparatus for multiplying a sampled analog signal by a multiple bit digital word coefficient. All signal processing operations are accomplished by the splitting, routing and combining of charge packets formed in a charge domain device. |
| 4616334 |
Pipelined programmable charge domain device |
October 7, 1986 |
| Programmable signal processing apparatus for multiplying a sampled analog signal by a multiple bit digital word coefficient. All signal processing operations are accomplished by the splitting, routing and combining of charge packets formed in a charge domain device. |
| 4584657 |
Charge transfer multiplier and filter |
April 22, 1986 |
| The signal processing apparatus includes a plurality of multiplying or charge splitting stages connected in series. A plurality of pairs of control words are provided, one word of each pair being the complement of the other word of the pair. Each pair of words is associated with a re |
| 4533960 |
System for encoding and decoding video signals |
August 6, 1985 |
| A system is described which makes use of the fact that in a raster scanned television system a high degree of correlation exists both in the luminance and in the chrominance signals of a pair of adjacent lines. Because of this correlation, the difference between the luminance signals |
| 4533936 |
System for encoding and decoding video signals |
August 6, 1985 |
| A first video signal is provided comprising a plurality of lines of a luminance signal, a first color signal and a second color signal, each of the lines having a duration of a first predetermined time. Each of the nonoverlapping pairs of successive lines of the luminance signal are |
| 4473837 |
System for encoding and decoding video signals |
September 25, 1984 |
| A system is described which makes use of the fact that in a raster scanned television system a high degree of correlation exists both in the luminance and in the chrominance signals of a pair of adjacent lines. Because of this correlation, the difference between the luminance signals |
| 4450408 |
Low loss wide band front end for NMR receiver |
May 22, 1984 |
| An inductive element of a multipole impedance transforming bandpass network of classical design such as Butterworth or Chebyshev, for example, is employed as a pick-up coil for sensing NMR signals. The network matches the high input impedance of an NMR receiver preamplifier to the low |
| 4375650 |
System for processing video signals |
March 1, 1983 |
| A video processing system in which each field of image data is divided into rows and columns of blocks of picture elements. The number of blocks utilized is large enough so that when each block is considered to be a picture element, the blocks provide a reasonable raster for the peripher |
| 4321481 |
Recursive charge transfer filter with a transmission zero at zero frequency |
March 23, 1982 |
| A filter utilizing charge transfer devices for providing recursive transfer functions with a transmission zero at d.c. or zero frequency is described. The filter includes a circular charge transfer shift register having an even number N of stages, greater than two, and first, second, thi |
| 4284909 |
Charge domain filter with a plurality of transmission zeros |
August 18, 1981 |
| A filter is described utilizing charge transfer devices for implementing transmission zeros. A first shift register is provided having a plurality of M stages, where M is an integer, each stage including a respective first charge storage region. A second shift register is provided having |
| 4284908 |
Charge domain filter with single transmission zero |
August 18, 1981 |
| A filter is described utilizing charge transfer devices for providing exponential smoothing of sampled data signals with a transmission zero at a predetermined frequency. A first shift register is provided having N serially coupled stages to each of which is coupled a respective accu |
| 4284907 |
Charge transfer filter |
August 18, 1981 |
| A charge transfer filter utilizing a charge transfer accumulator structure for exponential smoothing of sampled data signals is described. The charge transfer accumulator structure performs charge equilibration at high speed thereby enabling an exponential decay impulse response to be ob |
| 4280066 |
Charge transfer apparatus |
July 21, 1981 |
| A charge transfer device is described which includes a plurality of charge transfer channels or shift registers, each having at least two sections operable at two different clock frequencies to provide variable non-symmetrical time delays in the channels and which may be operated with |
| 4259598 |
Charge transfer signal processing apparatus transversal filter |
March 31, 1981 |
| A sampled data transversal filter utilizing charge transfer devices is described. The filter includes a charge transfer shift register including a plurality of stages to which a sequence of packets of charge representing samples of a signal is serially applied and clocked from stage |
| 4259597 |
Charge transfer signal processing apparatus |
March 31, 1981 |
| A filter utilizing charge transfer devices for providing recursive transfer functions is described. The filter includes a circular charge transfer shift register having an even number N of stages, greater than two, and first and second linear charge transfer shift registers. A composite |
| 4259596 |
Charge transfer signal processing apparatus filter |
March 31, 1981 |
| A filter utilizing charge transfer devices and having resonant transfer characteristics is described. The filter includes a first charge transfer shift register including a plurality of stages to which a first sequence of packets of charge is serially applied and clocked from stage to st |
| 4245250 |
Scan converter for ultrasonic sector scanner |
January 13, 1981 |
| The input data format in a single-sector or multi-sector scanner imaging system is chosen such that angulated scan lines intersect a lateral line at equal increments, and along the scan lines the echo signal is sampled at different rates whereby sampling points are along parallel raster |
| 4185318 |
Charge storage memory with isolation nodal for each bit line |
January 22, 1980 |
| A conductor-insulator-semiconductor (CIS) structure for a random access surface charge memory system is disclosed. The memory system comprises an array of memory cells including charge storage regions, charge transfer regions and charge receive-source regions formed along the surface |
| 4180792 |
Transmit-receive transducer array and ultrasonic imaging system |
December 25, 1979 |
| A linear transducer array with low overall side lobe sensitivity for use in steered beam imagers has a different interelement spacing for transmit than for receive, and preferably has a shorter transmit array with elements spaced at one-half wavelength as the center portion of a longer |
| 4180791 |
Simplified sector scan ultrasonic imaging system |
December 25, 1979 |
| A curved transducer array or a flat array with an acoustic converging lens functions as a fixed focus physical lens and is focused near maximum range. At longer ranges the full aperture is utilized for good resolution, and at shorter ranges up to a specified fraction of maximum range imp |
| 4161783 |
Charge-coupled multiplying digital-to-analog converter |
July 17, 1979 |
| A charge-coupled device (CCD) multiplying digital-to-analog converter mullies a bipolar analog signal, representing as a charge, by a digital word, and produces a four-quadrant analog product, also represented as a charge. An analog signal S is added to or subtracted from a bias, re |
| 4155260 |
Ultrasonic imaging system |
May 22, 1979 |
| A real time ultrasound imaging system which includes coherent demodulation of echo signals followed by time delay and coherent summation of the demodulated signals is described. As the range from which echoes are being received increases, coherent demodulation is maintained. Demodulation |
| 4155258 |
Ultrasonic imaging system |
May 22, 1979 |
| A real time ultrasound imaging system provided with a fixed focus and including coherent demodulation of echo signals followed by time delay and coherent summation of the demodulated signals is described. As the range from which echoes are being received increases, coherent demodulation |
| 4127034 |
Digital rectilinear ultrasonic imaging system |
November 28, 1978 |
| A B-scan ultrasonic imager produces a rectilinear image and has a linear transducer array with only one switch per element. Individual elements or overlapping transmit subarrays are selected sequentially to generate pulses of ultra-sound. Received echo signals are sequentially sent down |
| 4124862 |
Charge transfer filter |
November 7, 1978 |
| A charge transfer filter includes an accumulator charge storage location and means for alternately introducing charge into the accumulator charge storage location and then for removing a preselected fraction of the total charge in the accumulator charge storage location so that the total |
