Abstract: The tendency of a CMOS circuit to latch up is reduced by implanting ions of germanium or tin into the source and drain regions of the circuit. The low energy gap of these ions lowers the band gap of the source and drain regions, which in turn inhibits their ability to inject carriers into the substrate and well.

Abstract: A temperature compensated sense amplifier is connected to the sense node of a memory array which is OR tied to the bit lines of the array. A PNP current mirror supplies voltage independent controlled current to the sense node. A level shifting stage is connected to the sense node to establish a threshold sensing level, and to switch on to steer the current into the amplifier stage. A compensation stage is connected to the level shifting stage and the amplifier stage to compensate for the .beta. factors of the transistors and the resistive changes with temperature. A temperature compensated current sink is connected to the PNP current mirror to track over temperature in opposition therewith and maintain a constant current into the sense node. The level shifting stage and the amplifier stage also include temperature compensating features to provide a sensing threshold which tracks constantly over the operating temperature range.

Abstract: A process is disclosed for simultaneously fabricating bipolar and complementary field effect transistors. The process enables distinguishing the bipolar devices from the CMOS devices with a single base mask 108, while requiring only a single additional mask 114 to define the bipolar emitter and MOS gates. The process forms the gate oxide 100 for the MOS devices at an early stage, then protects that oxide with polysilicon 103 during subsequent fabrication steps. Self-aligned metal silicide contacts 137 are separated from undesired regions using sidewall oxidation techniques.

Abstract: The present invention is an improved subscriber line interface circuit which allows fast detection of an off-hook signal in the presence of a ringing signal during an answer mode while also permitting fast detection of dialing pulses during a calling mode. A programmable filter is used in the supervision circuit of the SLIC to allow the cutoff frequency of the filter to be varied so that the 20 Hz ringing signal will be attenuated during a ringing sequence and dialing pulse rates up to 20 Hz will be passed by the filter during the calling mode. A clamping amplifier is used to clamp the received signal to a maximum of 1.5 times the loop threshold current. This eliminates the large variations in the rise and fall times of the pulse dialing signal due to variations in the loop current caused by varying impedances of the telephone line. The filter is programmed by using an analog switch to bypass certain filter elements.

Abstract: Information indicative discrete events of interest imbedded in raw data are globally classified, or filtered with respect to scale and changes in the scale of observation to effect intelligent perception of phenomena. Large scale components are classified as events while small scale components of an identified event designate points of occurrence of the event. The invention has broad application in artificial intelligence and signal processing wherein perceived discrete events, including minima, maxima, inflections, cusps, and discontinuities have a significance other than as noise. Methods and apparatus are described which utilize the subject invention in signal processing applications.

Abstract: A protective device for protecting the viewing area of a vision panel from encroachment by flowable cement compositions used to bond reinforcing members to the edge portions of the viewing panel. The protective device is preferably formed of a material non-adherent to both the vision panel surface and the cement composition, and may include vacuum biasing facilities and an edge seal to provide a fluid barrier to the passage of the flowable cement compositions.

Abstract: Damage-free scores are initiated by engaging a scoring wheel to the surface of a refractory piece with the plane of rotation of the scoring wheel forming an oblique angle to the desired path of damage-free scoring. An aligning force generated by the interaction of the scoring wheel and the refractory piece during relative movement along the desired scoring path pivots the scoring wheel into alignment with the desired path of scoring, which pivoting creates a zone of surface damage which serves to initiate a damage-free score. Facilities are provided to urge the scoring wheel out of alignment with the desired path of scoring, with a magnitude of force less than the aligning force, such that the scoring wheel automatically returns to a pivotally offset initiating position when it is disengaged from the surface of the refractory piece.

Abstract: A damage-free score is initiated in a moving ribbon of glass by projecting grit material toward the surface of the ribbon in a controlled manner to create a selected zone of surface damage thereon. The selected zone of surface damage is then advanced under a scoring wheel sized, shaped, and loaded to generate the damage-free score upon encountering an appropriate zone of surface damage.

Abstract: Apparatus for providing a plurality of particles of grit material onto the surface of a refractory piece to be damage-free scored, whereby the entrapment of a particle of grit material between a biased scoring wheel and the surface of the refractory piece generates a zone of surface damage which initiates a damage-free score.

Abstract: Damage free scores are initiated in a refractory piece by advancing a pattern of grit material on the surface of the refractory piece under a properly biased scoring wheel. The grit material is preferably harder than the surface of the refractory piece but not as hard as the scoring surface of the scoring wheel.

Abstract: A damage-free score, e.g., a subsurface score, in a moving refractory piece, e.g., glass, is initiated by imparting vibrations to a damage-free scoring wheel. The damage-free score is increased in depth by the continual impartation of the vibrations during the damage-free scoring of the piece.

Abstract: An inorganic silicate cement composition has its thermal expansion coefficient controlled for use with different substrates subjected to temperature variations through the inclusion of selected inorganic filler materials. Selected metallic powder filler materials are provided to yield a relatively high thermal expansion coefficient and fused silica powder is provided as a filler material to yield a relatively low thermal expansion coefficient.

Abstract: Removal of gas inclusions from a molten glass pool is enhanced by inserting a gas inclusion-permeable, refractory metallic or ceramic screen in the downstream flowing, upper portion of the pool, to diminish the glass flow rate adjacent the surface by viscous drag forces while permitting gas inclusions to rise through the screen to the surface of the molten glass pool to dissipate into the atmosphere therealong.

Abstract: A coherent thin sheet of glass batch materials is advanced onto a pool of molten metal contained in a glass melting furnace to melt thereon, preferably in non-contacting relation to refractory sidewalls of the furnace.

Abstract: A laminate assembly having rigid sheets about a thermoplastic interlayer has interfacial surfaces evacuated and peripheral edges sealed by applying localized vacuum and heat to only the periphery and marginal edge portions. A flexible heating blanket having marginally embedded heating elements overlies the laminate assembly and is biased theretoward by a flexible channel-shaped ring. The channel-shaped ring establishes a conduit about the periphery of the laminate assembly which is evacuated to remove entrapped air, and the heating element is energized to bond and seal the marginal edge portions of the assembly.

Abstract: A vacuum lifting device having a plurality of chambers, each chamber having an isolating member within to control communication between a common vacuum plenum and a sheet engaging surface. Each isolating member is controllable independent of the presence of an article adjacent the sheet engaging surface to allow for lifting selected ones of a plurality of articles. Those chambers which overlie at least a portion of a selected article and which overlie no portion of an unselected article are activated, or, alternatively, those chambers which overlie a single selected article completely within the peripheral boundaries thereof are activated.

Abstract: A stretched acrylic sheet which is to be formed into a vision panel at an elevated temperature has its major surfaces reheated to an elevated temperature to intentionally generate a class of surface formations thereon for subsequent removal by polishing prior to the formation of the final vision panel. Such surface deformations are otherwise undesirably generated during vision panel formation and detract from the optical quality of the final product.

Abstract: An electroconductive laminated window having an electroconductive coating applied to one interior substrate surface with a pair of bus bars electrically connecting a source of electrical potential thereto. The bus bars include an electroconductive layer having volume resistivity less than about 10.sup.-2 ohm-cm interposed between and conformable to the surface configurations of the electroconductive coating and a flexible metallic current carrying member. The metallic current carrying member is preferably a mesh of thin copper foil which is substantially bendable in its own plane, and the electroconductive layer is preferably a metallic layer substantially free of non-metallic components, consisting of a mixture of finely divided electroconductive particles and finely divided metal alloy particles having a fusion temperature between about 70.degree. C. and about 150.degree. C.

Abstract: Apparatus for selectively heating marginal edge portions of a stream of molten glass includes at least two independent heating elements presenting a substantially planar heating face toward the marginal edge of a stream of molten glass flowing in close proximity thereunder. A first set of the heating elements overlies a portion of the marginal edge adjacent a containing sidewall and the second set is positioned inboard of the first set relative to the central portion of the stream. Generated heat is directed primarily downward, e.g., greater than about fifty percent, and preferably greater than seventy-five percent toward first and second distinct areas of the marginal edge by a thermal insulating barrier positioned over the heating elements, to provide first and second localized zones of heating. The heating elements may be cantilevered through the sidewall in close proximity to the stream of molten glass.

Abstract: A peripheral edge-containing member is provided to reduce the length of the projectile path of fragmented particles expelled outwardly from the peripheral edge of a frangible pressing plate which is broken during the press-stretching or press-polishing of acrylic sheets. The acrylic sheets are fabricated for use in light weight transparencies.