Abstract: A high-frequency, high-power FET constructed upon a planar substrate with a repeated pattern of gate, source, and drain connections wherein any two are interconnected with metallization layers adjacent to and separated from the semiconductor substrate. The third element is interconnected with an overlay metallization layer separated from the lower two metallization layers by an insulating dielectric. The overlay layer is preferably grounded for minimum feedback capacitance.

Abstract: A communication system for inphase and quadrature modulation of low frequency signals wherein the modulated signal frequency bands lie close to a carrier, the system including a pilot tone having a fixed frequency ratio to the carrier, the system further including a demodulator employing the pilot tone in a phase locked loop for synthesizing a coarse replica of the carrier, a filter incorporating inphase and quadrature channels utilizing the coarse carrier for extracting the actual carrier from the modulated signal spectrum and synchronous detection of the signals by means of the extracted carrier.

Abstract: A beam lead packaged semiconductor structure having the beam leads of the beam lead semiconductor chip bonded directly to the thinned coplanar tips of lead frame leads which are supported on, and bonded to, an insulating support forming a portion of the package envelope and having substantially the same thermal coefficient expansion as the lead frame metal.

Abstract: An organic carbon analyzer system particularly adapted for the continuous analysis of raw sewage of a municipality. A gaseous transport is provided for carrying acidified liquid sewage including dispersed particulate matter through an elongated aeration chamber wherein carbon dioxide evolved from inorganic salts diffuses away from the sewage and into the gas. A second gaseous transport free of carbon dioxide and including an oxidizing agent then carries the sewage into a heated chamber having a tortuous interior surface which provides sufficient retention time to oxidize organic carbonaceous materials of the sewage resulting in a second evolution of carbon dioxide. An analyzer provides a continuous reading of the concentration of the carbon dioxide produced in the heated chamber.

Abstract: A system for portraying data obtained by a radiographic camera, such as an Anger camera, which signals the occurrences of radioactive events and the addresses of locations of the events. Data is obtained from a reference subject and a living subject. The activity of events of the reference subject is stored as a function of event location and is utilized as scale factors for scaling the relative energies of event signals obtained from the living subject, whereby data of the living subject is normalized relative to the reference subject.

Abstract: An array of sonar transducers enclosed within a flexible webbing and having spring members located between the transducers for urging the transducers against the webbing to provide a rigid structure which secures the transducers in their positions in the array. The webbing is stowed in spaces between the transducers with the array being in a compressed attitude and secured within an outer canister to permit air dropping of the array into the ocean.

Abstract: A system providing linear amplification of a signal including a pulse duration modulation of the signal upon a carrier signal, the system further including a plurality of amplifying units which are sequentially activated by the modulated carrier. The amplifying units are arranged in the form of a bridge circuit, the nodes of which are coupled to a load, the amplifying units including transistors which are driven alternately in states of conduction and nonconduction for maximizing power coupled to the load while minimizing power dissipated in the transistors. A filter connected between the amplifying units and the load attenuates signals at the frequency of the carrier so that the waveform of the signal applied to the load duplicates the waveform of the signal at the input of the system.

Abstract: A radiographic camera having a scintillator and an array of photodetectors positioned for viewing a common region of the scintillator, and wherein a mask system is interposed between the scintillator and the array of photodetectors for increasing the resolution of an image produced by the camera. The mask system has a pair of mask plates which are spaced apart and have similar formats of opaque materials thereon. The mask system provides a more rapid variaton in the intensity of light received at a photodetector as a function of locations of scintillations on the scintillator. A reference signal source providing a signal pattern in accordance with the intensity variation is utilized for decoding shadows cast by the mask to produce the image.

Abstract: A fusing technique whereby a fuse is fabricated upon a substrate by integrated circuit techniques. Three or more layers of chemically dissimilar metals are deposited upon the region where the fuse is to be formed. The top layers are then etched away from the region where the fusible link is to be formed leaving the lower two layers, the top one of which forms the actual fusible link. The lower layer is then etched away leaving the fusible link suspended from the underlying substrate. The current necessary to cause such a fuse to blow is consistent from fuse to fuse since the physical dimensions of the fusible link can accurately be controlled with the integrated circuit techniques used and, since the fusible link is not in contact with the substrate, the rate at which heat is conducted away from the fusible link cannot vary from fuse to fuse.

Abstract: A lithospheric electromagnetic telemetry system specifically adapted for telemetry of oil well drilling parameters from well bottom to surface of the earth. Sensors measure such parameters as pressure, temperature, salinity, direction of well bore, bit conditions, as well as the standard well logging parameters. The sensor outputs are converted to digital form and stored in a local memory until they are transmitted upon a triggering signal from a surface station. Transmission is accomplished by phase shift modulating an ELF (Extra Low Frequency) or ULF (Ultra Low Frequency) carrier, preferably in the range of 1-30 Hz. Repeater stations which delay and retransmit the signal are spaced along the oil well drill pipe as required. Both the well bottom station and repeaters are mounted inside the oil well drill pipe without substantially decreasing clearance for mud flow.

Abstract: An improved reliability microwave communications system combining discrete state modulation with diversity transmission and reception. Signals are transmitted and received in both horizontal and vertical antenna polarization using QPSK modulation techniques in the preferred embodiment. At the receiving terminal the received signal with the best quality as determined by predetermined receiver parameters is selected as the output data stream. Switching between received signals is accomplished using a hitless switch such that no data is lost when switching between received data streams. Redundant switching and transmitting circuitry may also be provided to further increase the reliability of the system.

Abstract: A system for analyzing a material such as sewage, the system including a preprocessor for extracting volatile compounds of carbon from inorganic carbonaceous substances within the material, a high-temperature reactor wherein the material chemically reacts with a gaseous reagent to produce a measurable amount of a gaseous product, and a chamber positioned at an exit port of the reactor, the chamber having a liquid covered surface to separate precipitates from the gaseous product.

Abstract: A stand-alone, interactive processor and display system for displaying, performing positioning, sizing, and performing supportive composition functions for newspaper ad layout. Interactive work stations position copy, edit and correct text, adjust style and point sizes, to accomplish accurate composition functions. A Bit Image Memory digitally stores all displayed patterns directly to minimize the response time of the system to operator inputs. An arithmetic unit and character generator are disclosed which produce lines and character which accurately represent the final copy.

Abstract: A stand-alone, interactive processor and display system for displaying, performing positioning, sizing, and performing supportive composition functions for newspaper advertising layout. Interactive work stations position copy, edit and correct text, adjust style and point sizes, to accomplish accurate composition functions. A Bit Image Memory digitally stores all displayed patterns directly to minimize the response time of the system to operator inputs. An arithmetic unit and character generator are disclosed which produce lines and characters which accurately represent the final copy. The arithmetic unit or processor includes a special purpose internally programmed arithmetic processor unit for controlling all display update operations in a newspaper advertising composition display system. Internal control is achieved through a Programmable Read-Only Memory in which all program operations are prestored. The arithmetic unit controls dot matrix character symbol representations in size and position.

Abstract: An imaging system utilizing a scintillation camera for photographing subjects emitting gamma and X-radiation. Masks are sequentially positioned between the subject and the camera to produce a sequence of shadowgrams upon the face of the camera. Output signals of the camera are summed together to give an array of sum signals, the array of sum signals being Fourier transformed followed by a matched filtering by multiplication of the frequency terms by an array of factors utilized in generating the masks. Phase factors are applied to the camera output signals, either before the Fourier transformation or during the matched filtering, the phase factors identifying the masks utilized in producing the respective shadowgrams. An inverse Fourier transformation then results in an image of the subject.

Abstract: A synchronized power supply for use with display systems and data processing equipment in general in which information is displayed on a screen such as a cathode ray tube in which the power supply is synchronized to the display such that internal synchronization is maintained regardless of variation in external synchronization. A unique converter arrangement transfers regulated power to the loads at high efficiency such that both improved power supply and display operation result.

Abstract: An electrolytic measurement system incorporating a probe for the measurement of the conductivity of fluids such as sewage and other industrial effluents. The probe has a smooth surface to passage of the fluid with flush-mounted electrodes arranged serially along the passage. The passage is formed within material that is an electrical insulator and is surrounded by a metallic shield symmetrically positioned with respect to the ends of the serially arranged electrodes. An electric potential is impressed between the outer electrodes and the shield, the latter being grounded, while an inner electrode is used for the measurement of electric current flowing through the fluid from the outer electrodes to the inner electrode.

Abstract: A display and power supply system in which the power supply uses a switching frequency which is higher than the highest linear deflection rate used in a cathode ray tube display device supplied by the power supply and in which the frequency of the power supply and the information repetitively displayed on the display are synchronized to eliminate interference of the power supply frequency with the display characteristics.

Abstract: A radio beacon navigation system wherein buoys placed at predetermined locations in a harbor or channel transmit identification signals. Every buoy is assigned a unique carrier frequency upon which is transmitted a signal capable of identifying the buoy. Each buoy is shown on harbor charts according to the unique properties of its signal. Radio receiving means carried aboard vessels navigating through the harbor or channel include means for determining the identity of the buoy from which signals are received and the direction from which the received signals emanate.

Abstract: A semiconductor integrated circuit which is reduced in size by having active and/or passive elements in an epitaxial layer having a [100] crystallographic surface, and having anisotropically etched regions with sloped [111] crystallographic surface walls which isolate adjacent semiconductor elements and/or regions of semiconductor material beneath said elements. Conductors interconnecting said elements are supported on the [100] and [111] crystallographic surfaces and contact said elements and/or said high conductivity regions through apertures in surface passivating protective coatings on said surfaces.