Abstract: A multi-port valve uses a flexible sample tube to selectively intercept gases flowing from inlet ports into a common manifold space. The manifold space is placed under sufficient vacuum to insure that gas samples will be selectively received by the sample tube when the sample tube is placed in close proximity to the selected inlet port to be sampled. The sample tube is arranged so that gases to be sampled from the selected port wash over the entrance end of the sample tube so that contaminated or mixed gases from the manifold space are prevented from entering the sample tube. The sample tube is mounted to pivot inside a valve body and is moved by a sample tube guide which rotates inside the valve body to selectively align the sample tube with the inlet ports. The valve body may be sealed by a cover through which the valve guide is driven to rotate by a magnetic coupling, or by a bearing seal through which the sample tube guide projects.

Abstract: De-glitch circuitry selectively responds to the time duration of actuation signals for selecting between pages in a read only memory. The de-glitch circuitry uses MOSFET transistors to act as resistors and capacitors in order to provide an RC time constant. The RC time constant is selected to allow the de-glitch circuitry to eliminate spurious glitches and prevent unwanted segment selections in the memory. The de-glitch circuitry is used with a voltage reference generator, segment selection decoders, sense amplifiers, and a flip-flop; all of which are constructed of MOSFET transistors and incorporated in a read only memory integrated circuit chip. The de-glitch circuitry is particularly useful in the construction of program cartridges for video game computer systems.

Abstract: A silicon on sapphire (SOS) semiconductor structure may be processed to improve the electrical characteristics of a silicon film on a sapphire substrate by silicon-regrowth (SRG) techniques using oxidation to remove silicon from the outward surface of the silicon film. An epitaxial film on a sapphire substrate is implanted with silicon to amorphize the silicon film except for a thin seed layer on the outward surface of the silicon film. The silicon is recrystallized inwards using the seed layer as a seed for crystallization. The silicon film is oxidized to produce an oxide layer on the outward surface of the silicon film, the SOS structure may be heated to densify the oxide layer, and the oxide layer is etched away. This produces a silicon film with a reduced p-type electrical activity and improved crystalline quality surface so that the channel mobility is improved for semiconductor devices fabricated in the silicon film.

Abstract: Disclosed is a method of making electrical connections to thin film coatings and the electrical connector formed thereby especially useful in a fluid flowmeter. The film with its conductive coating is pressed against a rigid, relatively long, connector bar by conductively coated pads of elastomeric material at a selected controlled pressure with the electrical connections to the film coating being made through the bar and pads. Utilizing this method, localized high stress area which cause damage to the thin film are avoided, and low current densities are accomplished by the controlled contact pressure over a large area of the film coating.

Abstract: A charge-transfer-device (CTD) transversal filter which makes use of tap-weight-adjustment circuitry for removing effects of charge-transfer inefficiency (CTI) and fixed-pattern noise (FPN). The tap weights are adjusted by measuring the response of the CTD-transversal filter to an isolated pulse input and to a zero-frequency input. The results of the measurements and reference-filter coefficients are used by the tap-weight-adjustment circuitry in order to set tap weights for the CTD-transversal filter. The tap-weight-adjustment circuitry allows the frequency response of the CTD transversal filter to be accurately tailored even though the CTD filter suffers imperfections due to CTI and FPN.

Abstract: A microcomputer interval counter circuit for detecting the time interval between input signals and for determining when the detected time interval exceeds a preset time interval.The interval counter circuit includes a latch connected to a bus of the microcomputer for storing the preset time interval duration, a counter circuit connected to the latch and to the microcomputer clock for decrementing a number stored in the counter and producing a timing indication as an interrupt to the microcomputer processor, and an OR gate connected to load the counter from the latch when an input signal is received, or when the counter circuit fully decrements.

Abstract: A transversal adaptive filter with a tap weight computer having a respective first and second input responsively coupled to a respective output and input of the filter, and including spectrum shaping means. The spectrum shaping means comprises matched or like preselected bandpass means interposed at the inputs of the tap weight computer.

Abstract: A process in the manufacture of integrated circuits in which a barrier layer of Cr or Ti is deposited in a partial atmosphere of N.sub.2 in an Ar sputtering gas on a layer of Si so that the N.sub.2 is incorporated in the Cr or Ti, after which conductor material such as gold, silver, low temperature eutectic or other high temperature solders, are deposited on the barrier layer. This barrier layer reduces migration of Si and Cr through and over the conductor material so that a wettable (bondable) surface is provided which results in greater bond strength and greater reliability when the die is attached to a bonding pad by the conventional heat treat method.

Abstract: In a flowmeter system having a transducer assembly defining a path for confining the flow of fluid medium there through and with first and second acoustic transducer elements disposed along said flow path for generating and receiving acoustic compression waves in the fluid medium, a phase-locked loop transmitter/receiver system including a voltage-controlled oscillator for adjusting the frequency of the acoustic compression waves to maintain the compression wavelength constant, together with circuitry for measuring the phase difference of the received acoustic compression waves relative to the applied electrical signal and circuitry for producing a signal representative of both the velocity of sound in the fluid medium and the direction and magnitude of the flow, the improvement in the circuitry which enables operation over a wider range of fluid density by causing the operating phase of the system phase-locked loop to vary in a continuous manner according to a previously determined relationship of phase-vers

Abstract: A technique performed in a fixed address particle beam lithographic system where the writing is performed in the normal manner for writing a pattern, for example, a stripe on a resist having a selected feature width except that an additional row of alternate pixels is written either before or after the selected feature is written. The alternate pixels, when the resist is developed, will provide a feature width of approximately 1/2 a pixel wider than the selected feature width due to blurring of the latent image caused by scattering of the particle beam within the resist. Thus, the resolution of selectable feature widths is enhanced with little or no loss of throughput. The same technique can also be utilized to lengthen a feature by 1/2 a pixel width. The technique is disclosed primarily in a raster scan machine but also disclosed is the technique in a vector scan machine. Also disclosed is a flow chart showing the invention used while preparing the data to be written by the machine.

Abstract: A coil arrangement for testing magnetically operative devices comprising means for mounting a magnetically operative device to be tested by an external magnetic field; first and second coil means disposed symmetrically with respect to the place of the device, the coil means functioning to produce an external magnetic field for testing the device; characterized in that the first coil means is embedded within a metallic electrically conductive body for confining the magnetic field lines to a predetermined region.

Abstract: A digital frequency synthesizer for synthesizing a selected frequency or a library of preselected frequencies in which a selected phase increment is fed at a clock rate to an adder and accumulating register in mutual cooperation as a digital integrator, the resultant period overflow of the register corresponding to the selected frequency of interest. An improvement is provided for reducing discrete spectral spurs in the spectral output of the synthesizer by means of preselectively randomly jittering the input to, or output of, the register, whereby the average periodicity of the register overflow for a selected frequency is not affected.

Abstract: A process for forming a doped region in a substrate which is in alignment with a circuit member by forming a masking member on a layer, the masking member defining the outline on the circuit member; and etching the layer employing the masking member as a mask to define the circuit member, the etching continuing such that the circuit member includes sloping side faces. Subsequently, a dopant species is implanted into the substrate so as to form the doped region, the dosage and energy of ions implanted being selected such that ions are partially blocked by the portion of the circuit member beneath the sloping side faces thereby providing a more lightly doped and more shallow distribution of implanted species region than in other regions.

Abstract: A multiplexer for allowing multi-octave processing of sampled data by means of a common single-octave data processor. Sampled data is preselectively delayed, corresponding to delay-coding thereof, and a multiplex switch samples the progressively delayed delay-coded data at progressively reduced data sampling rates, corresponding to lower octaves of interest. In this way the several octaves of data are interleaved or time-multiplexed. Similar multiplexing within the single-octave data processor corresponds to frequency multiplexing of the time-multiplexed multi-octave data, whereby the single bandwidth limit processor may handle such multiple-octave data.