Abstract: A digital oscilloscope is provided with a display system which permits intensified time dots to be positionable between samples on a displayed waveform. The display system has a time dot memory having at least twice the number of addressable storage locations as a waveform memory. An address counter drives the time dot memory and the waveform memory, with time dot memory address count including one or more lesser significant bits than the waveform memory address count. The resolution of the time measurement provided by one or more time dots may be increased by increasing the time dot memory space and adjusting the corresponding number of address count bits to clock the memory at the commensurately higher rate.

Abstract: A circuit within an image-forming system for enhancing the gray scale quality of a refreshed raster-scan presentation by causing the raster lines of successive frames of such presentation to be successively interlaced whether such frames are of single- or double-field composition. Also disclosed is a hard-copy device employing such a circuit.

Abstract: A device and method for producing a digital signal representative of the position of a moveable control stick relative to one or more reference planes. The device includes means for detecting the location of a shadow cast by a portion of the control stick extending between one or more light-emitting elements and one or more light-sensitive elements, and means for generating a digital signal representative of the detected location. With the light-emitting or light-sensitive elements oriented in a planar array, the signal thus generated is representative of the position of the control stick relative to the plane of the array.

Abstract: A single pass multicolor thermal transfer printer for recording color images on plain paper by transferring spots of different colored materials from a carrier sheet as it and a sheet of paper are moved across a printhead in contiguous relation. The printhead includes a plurality of individual thermal elements that are selectively energized in timed relation to transfer colored materials from discrete areas of the carrier to the paper as the sheets pass over the printhead. The carrier includes separate, repeating patterns of four different color materials--three primary colors plus black--permitting the formation of multicolor images by energizing the appropriate elements as areas of the desired color materials are moved into registration with them.

Abstract: A dynamic focus system for a cathode ray tube display system is described. In some cathode ray tubes an electrostatic or electromagnetic stigmator is driven by a correction signal derived from the beam deflection signals. The required signal is proportional to the product of the horizontal and vertical deflection signals. The described system incorporates a means for making the constant of proportionality independently adjustable for each quadrant of the cathode ray tube screen.

Abstract: A direct view cathode ray storage tube utilizes a thin film electroluminescent layer as a part of the target structure so that the electron beam writes information on the phosphor layer and written areas of the phosphor layer activate corresponding areas of the electroluminescent layer so that these areas are illuminated thereby visibly displaying such information which are stored by the electroluminescent layer so long as sustain pulses are applied thereto. Selective erasure of the written displayed information can also be accomplished.

Abstract: A means and method for accessing a digital memory system in a manner permitting the transfer of a two-byte information signal into and out of a storage area defined by any two logically adjacent memory bytes. Provision is also made for maintaining a preselected locational integrity between the bytes forming the information signal.

Abstract: A beam-index display system wherein a control signal representative of the position of an electron beam within a beam-index cathode-ray tube is employed to control concurrently both the generation and selection of video drive signals for transmission to the beam-producing apparatus of the tube.

Abstract: A removable diode package for mounting beam-lead diodes in coaxial, stripline or waveguide microwave circuits is described. The diode package is capable of operation at frequencies above 40 GHz. A low-dielectric polyimide insulating washer is used to reduce parasitic elements normally associated with diode packages at microwave and millimeter frequencies.

Abstract: A phase multiplexed CCD transversal filter includes N substantially identical parallel-connected CCD's which acquire samples in a predetermined consecutive order over a given clock cycle so that the apparent sampling frequency is equal to N times the clock frequency. The output taps of the CCD's are weighted in a predetermined manner to provide a filter having a predetermined transfer function.

Abstract: A circuit for driving and protecting the horizontal output transistor of a resonant raster scan display is disclosed. The driving circuitry described provides a circuit for separately establishing the currents required to turn a horizontal output transistor on and off. This transistor is turned on by a forward base current determined by beta requirements and turned off by a reverse base current equal to one half of the forward collector current. Protection against several common circuit failures is also incorporated in the circuit.

Abstract: A Darlington-connected transistor pair is modified by the addition of a third transistor to form a three-terminal composite transistor wideband amplifier the current gain of which is approximately double that of a single transistor.

Abstract: A memory preservation and verification system is provided in which memory contents are verified as being valid following an interruption and subsequent reapplication of operating power. A backup power supply is provided to maintain the status of the memory contents during the interruption or loss of a main power supply. First and second mathematically related numbers are generated and stored in memory locations. These numbers are subsequently retrieved and the mathematical relationship therebetween checked to provide the verification of the status of data in the memory.

Abstract: An improved erase cycle for direct-viewing bistable storage tubes that substantially eliminates the bright flash characteristic of conventional erasure methods. As applied to the backplate of a meshless storage tube, the improved cycle suitably comprises two or more short (about 2 to 10 ms) fade positive pulses separated by a negative, decaying recovery pulse about 50-100 ms in length and optionally, a "dead time" of about 200 ms at the target operating level. The final fade positive pulse is followed by a longer recovery interval that gradually increases the backplate voltage to its previous operating level while the flood guns retain the storage phosphor in an erased, unwritten condition.

Abstract: A system and method for varying the phase of an index-related control signal produced within a beam-index display system in a manner compensating for the effects of cross-modulating the index signal with the video drive signals. Provision is made for monitoring the magnitudes of selected video drive signals and for shifting the phase of the control signal in a manner compensating for the effects of such drive signals on the index signal from which the control signal is derived.

Abstract: An improved, ultra high speed (2GHz) CMOS inverter structure comprising a double-diffused, planar p-channel transistor and a nonplanar n-channel transistor formed within adjacent surface fields on the same substrate. The n-channel device includes a source region formed in an elevated, plateau region on the substrate, and a narrow, implanted channel-forming layer that extends through the plateau beneath the source region and terminates at a slope joining the plateau to surrounding lower elevation portions of the substrate. A drain region is formed adjacent the foot of the slope, spaced from the channel to provide a drift region between them.

Abstract: An improved, high speed n-channel MOS inverter structure including a self-aligned silicon gate depletion-mode load device integrated in series with a nonplanar, submicron channel enhancement-mode switching transistor. The enhancement-mode switching device is formed on a field of the substrate that includes an elevated, plateau region joined to a surrounding planar area by a slope. The MOS load transistor is formed on an adjoining planar portion of the surface. The process for fabricating the devices features successive ion implation of boron and arsenic through an oxide layer that includes a smoothly tapered "beak" formed by a local oxidation technique.

Abstract: A waveform observing method and apparatus incorporating signal sampling and digital technologies is disclosed. An input signal to be observed is compared with the output from a digital-to-analog converter and the comparison output is used for controlling display means such as a cathode-ray tube. A wideband input signal can be measured with much higher accuracy than the conventional apparatus.

Abstract: A general-purpose oscilloscope system is disclosed wherein waveforms acquired by the vertical and horizontal preamplifier channels can be displayed immediately, or they can be digitized and stored in a memory from where they can be recalled, reconstituted in their analog form and displayed at a later time. The processing system permits simultaneous display of instantaneous and processed waveforms, and includes facilities for processing associated z-axis signals and readout data as well. Access to peripheral equipment, such as a computer or the like, permits the digitized waveforms to be mathematically manipulated and returned to the memory in the processing system for ultimate display. The oscilloscope system can be assembled in a modular manner, whereby the processing unit becomes an integral part of the instrument, or the system can be assembled as a general-purpose oscilloscope without the processing unit, allowing a user to add the processing capability to his system at a later time.

Abstract: An electrical connector apparatus is provided for connection of coaxial transmission lines to etched circuit boards. The apparatus comprises a back plane carrying one or more circuit board edge connectors, a ground plane for engaging a contact on a circuit board plugged into the edge connector, and an arrangement of connector pins which permits most of the edge connector pins to be used for signals while maintaining a high frequency response for subnanosecond pulses.