Patents Assigned to Tektronix, Inc.
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Patent number: 4190311Abstract: A clip for connecting an electrical component to testing equipment, comprising conductive elements mounted in a carrier in positions to engage the terminals of a multi-terminal electrical package. The conductive elements are connected via a flat cable to a remote test instrument. The profile of the clip is such that it may be connected to a multi-terminal electrical package while it is operating in an instrument having closely spaced circuit boards. Consequently, this clip eliminates the need for conventional extender boards in most test situations.Type: GrantFiled: February 26, 1979Date of Patent: February 26, 1980Assignee: Tektronix, Inc.Inventor: Thomas P. Basta
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Patent number: 4188563Abstract: A cathode ray tube includes first and second electrostatic quadrupole lens between the electron gun and the vertical deflection plates to properly focus the electron beam before it enters the vertical deflection plates. A third electrostatic quadrupole lens is located between the vertical deflection plates and the horizontal deflection plates to enhance the angle of deflection as well as to properly focus the electron beam as it moves from the vertical deflection plates into the horizontal deflection plates. A meshless scan expansion lens follows the horizontal deflection plates and is formed of aligned tubular members having interdigitated sections thereby forming a fourth quadrupole lens which accelerates the electron beam and expands it prior to being impinged onto the fluorescent screen.Type: GrantFiled: August 31, 1978Date of Patent: February 12, 1980Assignee: Tektronix, Inc.Inventor: Bozidar Janko
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Patent number: 4186368Abstract: An improved resistance-type sensor for an electrical temperature probe includes a thin-film platinum resistor deposited on an oxidized silicon chip. The chip is eutectically bonded to the planar reverse side of a beryllium oxide tip-piece having a hemispherical face adapted for contacting the surface of an object being measured. The tip-piece is set in a thermal insulating plastic mount, spaced from a pair of low resistance electrical leads held by the mount. Very fine wires bonded between the leads and platinum resistor form high thermal impedance electrical connections to the temperature-sensing element.Type: GrantFiled: May 30, 1978Date of Patent: January 29, 1980Assignee: Tektronix, Inc.Inventors: Peter M. White, David L. Timmins
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Patent number: 4185227Abstract: A storage target for a cathode ray tube is formed by adhering a layer of glass to the rear of a glass faceplate and etching depressions or apertures in such layer. Secondary emissive dielectric or phosphor material applied in these depressions will have uniform depth and therefore uniform storage properties. A storage target according to the present invention is provided with a collector on the glass layer between the apertures therein, as well as with an undercollector between the glass layer and the faceplate.Type: GrantFiled: August 8, 1977Date of Patent: January 22, 1980Assignee: Tektronix, Inc.Inventor: Robert W. Morris
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Patent number: 4181903Abstract: A high-impedance cascade attenuator device includes a plurality of attenuator stages mounted on a single substrate by means of metallization and thick film processes. The attenuator stages are conventional frequency-compensated voltage dividers designed for high-frequency operation; however, the capacitive compensation is included in the thick film process, and the attenuator components may be trimmed to provide precise impedance ratios so that calibration or circuit adjustments are never required.Type: GrantFiled: February 14, 1978Date of Patent: January 1, 1980Assignee: Tektronix, Inc.Inventors: Kenneth C. Holland, Gary W. Reed, Desmond L. Murphy
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Patent number: 4171515Abstract: A circuit that improves the frequency response of a mixer but does not reduce mixer sensitivity is disclosed. The circuit provides a wideband constant source impedance for the mixer input through the use of a frequency diplexer.Type: GrantFiled: August 9, 1978Date of Patent: October 16, 1979Assignee: Tektronix, Inc.Inventor: Gordon D. Long
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Patent number: 4168870Abstract: A cabinet for an electronic apparatus comprises a housing adapted to provide an upright operating position for conventional bench or floor use, and a substantially horizontal operating position for overhead use. The housing includes a control and display panel which is preferably sloped to facilitate user convenience in either operating position. A portion of the housing adjacent the panel is built up to provide an integral handle and means for shading the display from the glare of overhead lights. A detachable hinged cover is provided to protect the control and display panel. Such cover may include accessory items and may provide storage area therefor.Type: GrantFiled: March 17, 1977Date of Patent: September 25, 1979Assignee: Tektronix, Inc.Inventor: James A. Hill
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Patent number: 4166200Abstract: An improved shaft-operated rotary switch construction for printed circuitry applications is disclosed. The improved switch is a modular design incorporating a standardized rotor element accommodating the mounting of wiper contacts in different positions and different operational orientations. Also disclosed is an improved releasable clutch mechanism providing one mode of operation in which the rotors of different switch sections are coupled together for simultaneous rotation, and another mode in which they are rotatable independently, the operating mode being selected by axial movement of one section's operating shaft relative to that of the other.Type: GrantFiled: August 7, 1978Date of Patent: August 28, 1979Assignee: Tektronix, Inc.Inventors: John E. Reichen, Scott B. Long
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Patent number: 4163950Abstract: A differential amplifier includes an input stage and an output stage which are electrically isolated from each other to permit the input and output portions of the circuit to be operated at different voltage levels. A pair of optical couplers are employed to couple the differential signal from the input stage to the output stage. The output stage comprises a linear gain cell to provide an output signal proportional to the differential signal through the couplers divided by the common-mode signal through the couplers to stabilize gain and minimize D.C. offset drift caused by small changes in physical parameters or temperature.Type: GrantFiled: March 1, 1978Date of Patent: August 7, 1979Assignee: Tektronix, Inc.Inventors: Wendell W. Damm, Choong R. Kim
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Patent number: 4163948Abstract: A circuit for attenuating undesired electrical aberrations associated with digital-to-analog converters is provided. Specifically, the circuit is a non-linear filter for attenuating undesired false or spurious electronic signals superimposed on the output waveform of a digital-to-analog converter when the digital word input signal is changed.Type: GrantFiled: April 27, 1978Date of Patent: August 7, 1979Assignee: Tektronix, Inc.Inventors: Michael L. Rieger, Martin D. Singer
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Patent number: 4162823Abstract: A lens mount in a camera assembly for use with a cathode-ray tube is provided. In particular there is provided a single body section spacer for insertion from one end of the lens assembly to the other end for changing the optical characteristics.Type: GrantFiled: October 31, 1977Date of Patent: July 31, 1979Assignee: Tektronix, Inc.Inventor: Brian K. Jorgensen
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Patent number: 4160276Abstract: The present invention relates generally to electrical signal transmission lines which are terminated in a manner enabling efficient use of signal energy transmitted through such lines while preventing signal reflections in such lines, and in particular is directed to a termination circuit for a lossy delay line which includes a pair of emitter coupled transistors having positive feedback to develop a negative impedance to terminate the lossy delay line to compensate for the loss in the lossy delay line.Type: GrantFiled: October 31, 1977Date of Patent: July 3, 1979Assignee: Tektronix, Inc.Inventor: Daniel G. Baker
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Patent number: 4159439Abstract: A bistable storage cathode ray tube wherein the bistable storage target thereof has a conductive layer provided on an insulating support member, the conductive layer including a multiplicity of collector electrode members having insulating material covering at least the collector electrode members except for an area thereof. A layer of storage dielectric material is provided on the conductive layer and the insulated collector electrode members extend through the layer of dielectric material. The exposed conductive area of the collector members collect secondary electrons emitted from written areas of the dielectric layer and provide a substantially uniform potential over the target surface. The interface between the dielectric layer and the insulating material around the collector electrode members provides isolation between the dielectric layer and the collector electrode members thereby minimizing luminance around the collector electrode members.Type: GrantFiled: August 2, 1976Date of Patent: June 26, 1979Assignee: Tektronix, Inc.Inventors: Duane A. Haven, Robert L. Arneson
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Patent number: 4157537Abstract: A system wherein dynamic capability is incorporated into direct view storage tube terminals to provide both refreshed and stored information. More specifically, the system incorporates dynamic picture capability into direct view storage tubes by utilizing a constant rate vector generator, a high speed deflection system and a local digital memory operating simultaneously to enable refreshed and stored vectors to be simultaneously displayed.Type: GrantFiled: April 19, 1976Date of Patent: June 5, 1979Assignee: Tektronix, Inc.Inventors: Thomas B. Cheek, Douglas J. Doornink, Roger M. Handy, David E. Heinen, Joseph H. Hubert, Ronald J. Wilson
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Patent number: 4156283Abstract: A linear analog multiplier circuit for multiplying electrical quantities comprises a pair of differentially connected nonlinear control devices, for example, transistors, and at least one further semiconductor junction device exhibiting logarithmic characteristics coupled thereto for compensating for the nonlinear properties of the control devices.Type: GrantFiled: October 3, 1977Date of Patent: May 22, 1979Assignee: Tektronix, Inc.Inventor: Barrie Gilbert
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Patent number: 4153518Abstract: A method of fabricating a hybrid circuit including a siliceous substrate and thick metal conductors. A thin film barrier layer is provided intermediate the substrate and a vacuum-deposited metal layer, which metal layer is subsequently electroplated to provide the desired metal thickness. The barrier layer, which may suitably be a refractory metal oxide such as the oxides of zirconium, tantalum, titanium, or tungsten, prevents loss of adhesion between the vacuum deposited metal and substrate that occurs during electroplating.Type: GrantFiled: November 18, 1977Date of Patent: May 8, 1979Assignee: Tektronix, Inc.Inventors: Robert E. Holmes, Robert R. Zimmerman
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Patent number: 4151444Abstract: A power supply for a color display device of the type in which the color of light emitted by a phosphor screen is changed by switching an electron accelerating voltage between different levels, the switching being digitally controlled and being connected so that descending voltage changes are recycled to efficiently drive the supply.Type: GrantFiled: December 23, 1977Date of Patent: April 24, 1979Assignee: Tektronix, Inc.Inventor: Timothy A. Jenness
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Patent number: 4151551Abstract: A programmable color enable and sequencing system for a sequential color and memory television system is provided. An output for sequencing the sequential colors of the SECAM system in a decoder and enabling color if chrominance is present is generated by statistically detecting the presence of color information and, using the same statistical detector, provides for synchronization of the color sequence circuits. The statistical detection uses FM information provided during the vertical interval and/or information contained in the color subcarrier of the composite SECAM signal. Additionally, the system includes means for providing a preprogrammed color enable for each one-half line defined according to user needs or system standards for enabling instantaneous decisions about which lines of the composite signal are color. Decisions as to whether or not the overall picture is color are made by the statistical detector.Type: GrantFiled: August 4, 1976Date of Patent: April 24, 1979Assignee: Tektronix, Inc.Inventor: Larry A. Nelson
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Patent number: 4150420Abstract: This disclosure describes an electrical connector for joining microcircuit or microcircuit modules, such as leadless integrated or hybrid circuit carriers to utilization means, such as printed or etched circuit boards or similar means. The electrical contacts through which the microcircuit and utilization means are connected are formed and etched in place on an elastomeric material, precisely located; the material acting as a restoring force to maintain connection. The connector when used in a system maintains transmission line mediums in a single environment.Type: GrantFiled: December 15, 1977Date of Patent: April 17, 1979Assignee: Tektronix, Inc.Inventor: William E. Berg
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Patent number: RE30094Abstract: A light actuated switch apparatus is described in which no movable switch contacts are employed. The switch uses a light source and shutter to activate an array of light sensitive devices to generate a binary code that provides the switching function. One embodiment of the switch apparatus is employed inside a control knob providing a binary code generated by shutter action of a light source on an array of photo-transistors. Another embodiment .[.employes.]. .Iadd.employs .Iaddend.the above control knob including switch apparatus as well as a second knob and printed board to form a dual switch apparatus. As no switch contacts are employed there is considerable reduction in electrical components. Additionally, this also greatly reduces the space required for mounting the switch, is readily serviceable or replaceable as no parts are located within an instrument, and is less expensive as no contacts eliminate any wear and potential problems associated with movable through stationary contacts.Type: GrantFiled: October 31, 1977Date of Patent: September 11, 1979Assignee: Tektronix, Inc.Inventor: Carlos L. Beeck