Abstract: Apparatus for and method of providing a variable speed cycle time for synchronous machines. The synchronous machine performs a number of functions, wherein the execution time for a given function is dependent upon the input quantities. Timing for the input dependent function is divided into fixed and variable sequences. A synchronous counter is loaded with a quantity representative of the input quantities. The synchronous counter then controls the duration of the variable sequences based upon the representative quantity. Since it is clocked by the system clock, the synchronous counter controls the variable sequences synchronously with the controlling of the fixed sequences.

Abstract: An apparatus for distributing the control of data transfers within single instruction stream multiple data stream processors. Each of the parallel processors or arithmetic units is coupled to a dedicated local memory. A main memory provides storage of system data. Each dedicated local memory and the main memory are coupled to a bus interface unit. Each bus interface unit is coupled to a common data bus for the transfer of data between the main memory and the dedicated local memories. Each bus interface unit provides the control functions required to transfer data between the common data bus and the main or local memory to which it is coupled. One bus interface unit is designated the resource controller. The resource controller performs all of the functions of a bus interface unit and also provides the system level functions of supplying clock signals and performing bus arbitration.

Abstract: A method and apparatus for eliminating narrow band noise and interference from a wide band signal while maintaining the wide band signal substantially intact.

Abstract: Each of the exclusive OR (XOR, or odd parity) and exclusive NOR (XNOR, or even parity) logical functions as between two signals input in both normal and inverted form is generated from separate logic circuits of two transfer gates implemented in complementary metal oxide semiconductor (CMOS) very large scale integrated circuit (VLSIC) technology. Replications of paired such XOR and XNOR logical circuits within a parity tree allow parity generation/detection as between 2.sup.N signals input in both normal and inverted form in only N propagation stages of typically average 0.9 nanosecond delay each stage when implemented in 11/4 micron feature size CMOS VLSIC.

Abstract: There is shown and described a floating point processor having improved architecture and configuration. The floating point processor (FPP) performs addition, subtraction, multiplication, division and square root operations. Usually, the square root operation is not built into the FPP hardware because of the increased complexity of the design, and, therefore, cost of the goods. Rather, the square root operation is usually implemented by firmware or software. The device of this invention performs the floating point square root operation in hardware rather than in software or firmware while adding very little additional hardware to existing circuitry which is required for the basic addition, subtraction, multiplication and division operations. In addition, the operations are performed as rapidly as, or more rapidly than, prior art devices.

Abstract: A cyclical machine forming tool utilizes positionally justified form knives so that, nominally, a selected 80 out of 120 total stripped wire ends of flat ribbon cable may be selectively simultaneously formed, for bent, into a contour such as is useful for soldered attachement to printed circuit cards. Positional justification of wire-forming hammer elements called form knives, nominally 41 in number, across a variable distance, nominally 1.676.+-.0.009 inches, is expediently repetitively accurately accomplished by wedging them apart with interspersed counterposed knife elements, nominally 40 in number, called adjuster knives.

Abstract: A novel method of depositing the oxide barrier junction on a base electrode of a Josephson junction device is provided. An ionized oxygen plasma region is generated juxtaposed the surface of the base electrode to be oxidized. The pressure of the oxygen in the vacuum chamber is held at a predetermined high pressure where the zero voltage supercurrent is found to be independent of oxygen pressure variations and the flow of oxygen through the vacuum chamber is stabilized at the optimum minimum necessary for growth of the oxide barrier junction. The oxide barrier junctions so produced have consistent and predictable supercurrent densities.

Abstract: A high speed code processing system for error correcting code is disclosed. It uses bit parallel residue generation for cyclic codes. This minimizes the time delay for cyclic code processing. Residue generation of the bit string is accomplished by processing multiple bits in each clock time instead of the conventional bit-by-bit implementation. Thus, the checkword calculation and the syndrome calculation are accomplished at a significantly higher speed than the conventional shift register approach to provide a system capable of on-line residue generation.

Abstract: A nondestructive readout, random access memory system is disclosed. The memory is formed of a plurality of discrete thin ferromagnetic film memory elements in which binary data are stored as the presence, or absence, of cross-tie, Bloch-line pairs. Column lines and row lines form a matrix array of the memory elements, one at each column line, row line intersection. Cross-tie, Bloch-line pairs are formed in the memory elements by the selective coincidence of row line and column line write drive fields while readout of the presence, or absence, of the cross-tie, Bloch-line pair is by a coincident row line read drive field and a column read current signal that flows through the memory elements aligned along a selected column. A read amplifier is differentially coupled across the one fully selected memory element to detect a first, or second, opposite polarity output signal that is indicative of the presence, or absence, of a cross-tie, Bloch-line pair at the one fully selected memory element.

Abstract: A multichip thermal conduction module has improved cooling in a housing having at least one board mounted therein including a plurality of chips on the board. A heat conducting plate is mounted in the housing adjacent the chips. A cold plate abuts heat conducting plate and includes an inlet an outlet connected to a coolant passage formed therein for guiding a coolant through the housing. Flexible heat conductors are connected to the heat conducting plate and are urged into aligned contact with the chips for conducting heat therefrom. The flexible conductors are in fluid communication with the cold plate passage for conducting coolant adjacent the chips.

Abstract: An automatic Memory Module sensing and Memory Module address assignment system during an initializing sequence is described. Each Memory Module has a memory assignment register associated therewith, and all memory assignment registers are initialized to an illegal Memory Module address. The interlock and switch signals are sequentially evaluated under control of a scan counter and decoder. A memory assignment counter is utilized to develop sequential Memory Module addresses and is advanced for each Memory Module found to exist in the system. The memory assignment register for the Memory Module under consideration is set to the address specified in the memory assignment counter if the Memory Module is determined to be present, or is left storing the illegal code if the Memory Module being considered is not present in the system or is switched off.

Abstract: A low-cost printer is provided for use with data processing equipment. A light-shielding retainer provides a substantially continuous sheet supply of printing medium including a conductive-resistant coating formed in strips which is light sensitive and heat developed. The medium is moved past a processing station. A first portion of the station includes an array of light emitting elements and a second portion includes an element for heating the medium sufficient for developing the medium thus visibly exposing and fixing the characters on the medium.

Abstract: A color cathode ray tube is provided in a color monitor of a video display terminal. The red, green and blue color video input lines are connected to novel control circuits which permit the selection of several different shades of colors for the background or cursor. The circuits which control the background colors are pulse modulated to provide digital shade control of the background color selected and automatically control the color of the cursor so that a contrasting color is provided.

Abstract: There is shown and described a new and unique counter mechanism or circuit which includes feedback latches, in cascade, and which monitors a "carry-in" signal which selectively causes the latch to toggle. When the contents of the latch is a binary 1, the carry-in signal propagates through the counter as a "carry-out" signal. Counting by the circuit occurs when the count input and carry-in signals are active.

Abstract: A method of fabricating a "hybrid" multilayer printed circuit board combining two dissimilar plastic layers of polyimide resin/glass and of epoxy resin/glass laminates. The finished hybrid multilayer printed circuit board is for, e.g., the support of and electrical interconnection to a plurality of magnetizable memory cores. The method includes sandwiching a plurality of epoxy-glass printed circuit boards having the desired copper patterns on both sides between two polyimide-glass printed circuit boards, each having the desired copper pattern on only one side. All the printed circuit boards are laminated with epoxy-glass prepreg to form a single hybrid multilayer printed circuit board consisting of the sandwiched epoxy-glass printed circuit boards and the sandwiching polyimide-glass printed circuit boards. Interconnections between patterned layers are formed by copper-plated through-holes.

Abstract: Apparatus is disclosed for positioning a continuous paper form having uniformly positioned seams and emanating from a high speed printing device, such as from a high-speed computer printer, in a bin or stacker. Air jets positioned on the stacker are utilized in a mode whereby air bursts from the jets impinge at discrete locations on a top surface of the form as it emanates from the printer. The air bursts cause the continuous paper form to fold naturally in a stacker bin at the paper seams.

Abstract: An apparatus comprising a rotating substrate holder is provided. The rotating substrate holder is hollow and adapted to receive liquid gas such as nitrogen to cool the substrate to cryogenic temperatures. The novel substrate holder is supported inside of a vacuum chamber by a thin wall tube which is sealed with a liquid rotating seal at the point where it passes completely through the top wall of the vacuum chamber. The novel thin wall tube support provides access to the hollow substrate holder from outside the vacuum chamber and provides temperature isolation of the liquid in the substrate holder so that the liquid rotating seals are maintained at operable elevated temperatures.

Abstract: A single Josephson junction device is arranged in a single branch which comprises an external source resistor connected in series with an output resistor and a Josephson junction device. An input node and an input resistor are in series and connected to the node between the output resistor and the Josephson junction device. Voltage signals applied to the input voltage node are amplified by connecting a high gain voltage output in parallel with the output resistor and providing sensing means for sensing the voltage output across the output resistor only when the Josephson junction device is switching from its low impedance state to its high impedance state.

Abstract: An improved method of anodization of thin films for the fabrication of superconducting devices. An electrically conducting contact layer is formed over a substrate between an electrically conducting object layer and the substrate. Also, an electrically insulating layer is formed between the object layer and the contact layer. The contact layer is connected to a power supply and at least a preselected portion of the object layer is anodized to a predetermined thickness. This may include anodizing all of some preselected portions through the complete thickness of the object layer. A pattern of hardened photoresist on the object layer provides portions not protected by the pattern. When anodization of the electrically conducting object layer takes place, the resulting anodized portion is thicker than the thickness of the portion of the object layer that it replaces.

Abstract: A track positioning apparatus for a (floppy) disk record medium to compensate for physical changes in the disk resulting from variations in temperature or humidity. A grating, used to position a read-write head, includes reference marks thereon corresponding to reference tracks on the disk. The grating is stretched or compressed proportionally during a calibration operation to compensate for changes in the flexible disk.