Patents Assigned to Texas Instruments
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Patent number: 4527149Abstract: A data display device has a manual input keyboard device that is infinitely adjustable with respect to its supporting surface between predetermined limits. The angular displacement mechanism that provides this adjustment is made up of a fixed arbor attached to the keyboard device and a rotating arbor attached to a foot. The arbors are axially aligned and rotatably connected together by a clutch coil spring. A manually operable push button mechanism on the keyboard device is linked to the tang of the coil spring so that when depressed, the tang is moved in a direction to unwind the coil spring, thereby permitting the locating arbor to rotate with respect to the fixed arbor, moving the foot away from the keyboard device. A tilt torsion spring is anchored to the movable arbor and connected to the keyboard device to cause the rotatable arbor to rotate when the push button is actuated thus moving the foot with respect to the keyboard device.Type: GrantFiled: January 28, 1983Date of Patent: July 2, 1985Assignee: Texas Instruments IncorporatedInventor: Michael W. Swensen
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Patent number: 4527234Abstract: The present invention is an emulator device for emulation of the functions and operation of a predetermined semiconductor device. A central portion of a semiconductor substrate of the emulator embodies the emulated semiconductor device. This embodiment of the emulated semiconductor device is an exact replica of the emulated device including all input and output connections. The emulator device further includes an additional set of input/output connections located on the periphery of the substrate outside the central portion. These additional input/output connections are connected to portions of the emulated device in the central portion of the substrate. These connections permit additional input signals to be coupled to the emulated device and additional output signals to be received from the device to enable greater control over and monitoring of the emulated device. This periphery preferably also includes further circuits for use in the emulator device for signal conditioning and the like.Type: GrantFiled: August 2, 1982Date of Patent: July 2, 1985Assignee: Texas Instruments IncorporatedInventor: Jeffrey D. Bellay
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Patent number: 4526008Abstract: A pneumatically controlled split cycle cooler utilizes a dual piston compressor in conjunction with a remotely positioned head, the dual pistons are angularly spaced to provide in phase and out of phase pressure pulses for the head; and the head includes a pneumatic piston having an upwardly extending stem to which is attached a displacer/regenerator, a coldfinger, and a pair of pressure volumes spaced above and below the piston by seals and a pneumatic dampening volume between the seals, said pressure volumes operatively connected to the dual pistons for adding and subtracting their pressures in a complementary manner for proper timing and location of the displacer/regenerator and said pneumatic dampening volume operative to provide a pneumatic dampening of the piston to prevent the displacer/regenerator from striking the ends of the cooler and creating audible noise and microphonic inputs to a load to be cooled.Type: GrantFiled: March 21, 1983Date of Patent: July 2, 1985Assignee: Texas Instruments IncorporatedInventor: Carol O. Taylor, Sr.
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Patent number: 4527142Abstract: A delayed-action thermal relay, particularly for starting single-phase induction motors, comprises a case of insulating material, a first, a second, and a third terminal within the case, an actuator unit consisting of a heating element of a material with positive temperature coefficient and of a bimetal member, and first and second contacts that are normally closed carried by the bimetal and by the third terminal respectively, said actuator unit being forcibly and adjustably inserted between the first and second terminals.Type: GrantFiled: September 16, 1983Date of Patent: July 2, 1985Assignee: Texas Instruments IncorporatedInventors: Pietro De Filippis, Amedeo Salvatore, Ciro Calenda, Giuseppe Notaro
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Patent number: 4525732Abstract: In a distributed IMPATT structure, power is coupled out through a side contact. That is, in previously proposed distributed IMPATT structures the gain medium (the active region of the IMPATT) operates as a transmission line. The prior art has attempted to couple output power from the gain medium through an end contact, i.e. through a contact which intercepts the primary direction of energy propagation of the active medium. In the present invention, a side contact extends along the whole active region in a direction which is parallel to the principal direction of propagation of the energy in the active medium. Thus, the side contact plus the active region together can be considered as a single transmission line.The present invention can be configured as an oscillator, amplifier, phase shifter, or attenuator. When configured as an oscillator, multiple short active regions can be sequentially coupled to a single long microstrip, which serves as the side contact for each of the active regions.Type: GrantFiled: August 31, 1983Date of Patent: June 25, 1985Assignee: Texas Instruments IncorporatedInventor: Burhan Bayraktaroglu
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Patent number: 4525678Abstract: A monolithic amplifier having a common-gate input stage with a device transconductance which is higher than required for input match, and a load impedance presented to the common-gate stage which is not conjugate matched. The present invention teaches a common-gate configuration using an FET with higher transconductance and a higher output load impedance. Over narrower bandwidths, excellent input match is thus obtained with noise figures at least as good as those obtained with the common-source approach. This combination of noise figure and input match is achieved in a compact monolithic structure.Type: GrantFiled: July 6, 1982Date of Patent: June 25, 1985Assignee: Texas Instruments IncorporatedInventors: Randall E. Lehmann, Gailon E. Brehm, David J. Seymour
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Patent number: 4523378Abstract: Electrical sockets used for mounting integrated circuits and the like are assembled by sequentially feeding electrically insulative bodies onto a track between a pair of endless belts which transmit motion to the bodies forcing them to move along a first path which extends beyond the belts. The socket bodies typically are provided with two parallel rows of contact receiving apertures which extend through the bodies from the top surface to the bottom surface thereof. A continuous carrier strip having spaced contact elements depending therefrom is directed along a second path which tangentially meets the first path so that the contact elements are sequentially received in one of the two rows of contact receiving apertures. The contact elements are securely seated by means of a seating roller and are then staked in position by one or more staking rollers after which the contact elements are severed from the carrier strip.Type: GrantFiled: March 16, 1983Date of Patent: June 18, 1985Assignee: Texas Instruments IncorporatedInventor: Thomas E. Evans
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Patent number: 4524431Abstract: A memory array using nonvolatile memory elements. Preferably multi-dielectric transistors are used to provide nonvolatile information storage. Good write speed is attained by providing a relatively low barrier to carrier injection. To compensate for the resulting low storage time, periodic refresh logic is provided, so that all cells in the array are refreshed at a given clock period, e.g. one second. To compensate for the changing characteristics of the nonvolatile transistors during their storage lifetime, a reference voltage generator is provided which consists of two nonvolatile memory cells programmed in opposite states, together with a resistive network for averaging their output.Type: GrantFiled: February 1, 1982Date of Patent: June 18, 1985Assignee: Texas Instruments IncorporatedInventors: Roger A. Haken, William E. Feger
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Patent number: 4524249Abstract: A keyboard assembly is shown utilizing a keypad formed from a sheet of soft rubber having a plurality of dome shaped portions. A conductive layer is disposed on the bottom surface of each dome shaped portion and is aligned with spaced interdigited conductive runs on a substrate at a switching station and is adapted to move into and out of bridging electrical contact with the spaced interdigitated runs. The keypad is compressed around the switching stations to form an environmental seal by ribs formed on an escutcheon and held there by posts projecting from the escutcheon through the keypad and substrate and deformed against the substrate. The substrate may be a flexible membrane supported by a rigid plate or it may be a circuit board type member. The dome shaped portions are integrally vented by a channel formed in the keypad extending between the dome shaped portions.Type: GrantFiled: June 1, 1984Date of Patent: June 18, 1985Assignee: Texas Instruments IncorporatedInventor: Charles F. Farrell
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Patent number: 4523812Abstract: To avoid obtrusive interference colors in a liquid crystal device having birefringent substrates, the two substrates are selected to be of markedly unequal thicknesses.Type: GrantFiled: November 23, 1982Date of Patent: June 18, 1985Assignee: Texas Instruments IncorporatedInventor: Perry A. Penz
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Patent number: 4524346Abstract: Analog AC to digital signal converter includes a sampling circuit which cyclically samples the analog AC signal to form analog sampling values, and an analog-digital converter for converting the analog sampling values to digital sampling values. A sign integrator integrates the sign of the digital sampling values, and a compensating voltage generator generates a compensating voltage in dependence upon the integration result. A combination circuit combines the compensating voltage with the analog sampling value from the sampling means and applies the combination result to the analog-digital converter. The circuit compensates any DC voltage component contained in the analog AC signal and avoids interferences resulting from such DC voltage component.Type: GrantFiled: July 2, 1982Date of Patent: June 18, 1985Assignee: Texas Instruments IncorporatedInventors: Hartmut Bosserhoff, Wolfgang Steinhagen, Ulrich Joeres
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Patent number: 4522791Abstract: A quartz arsenic cell having a stabilizing valve used to generate hot arsenic vapor which is flowed into liquid gallium, to provide a melt of liquid gallium arsenide from which a crystal can be pulled. The stabilizing valve prevents negative relative pressure from occurring in the quartz arsenic cell, and thus prevents the molten material from being sucked back up into the quartz arsenic cell.Type: GrantFiled: December 2, 1982Date of Patent: June 11, 1985Assignee: Texas Instruments IncorporatedInventors: Glenn H. Westphal, Jimmie B. Sherer
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Patent number: 4521275Abstract: A plasma etch chemistry which allows a near perfectly vertical etch of silicon is disclosed. A Cl-containing compound such as BCl.sub.3 has Br.sub.2 added to it, readily allowing anisotropic etching of silicon. This is due to the low volatility of SiBr.sub.4. The silicon surface facing the discharge is subjected to ion bombardment, allowing the volatilization (etching) of silicon as a Si-Cl-Br compound. The Br which adsorbs on the sidewalls of the etched silicon protects them from the etching. This new plasma etch chemistry yields a very smooth etched surface, and the etch rate is relatively insensitive to the electrical conductivity of the silicon.Type: GrantFiled: February 1, 1984Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventor: Andrew J. Purdes
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Patent number: 4521640Abstract: Semiconductor spheres are arranged within a plastic sheet and laminated between two metal foil layers to make electrical contacts. A portion of each sphere is exposed on one side to allow light entry. The back ohmic contact has a spreading resistance which protects large array configurations from short circuits. Series interconnections of cells, for higher voltage, can be made in the same processing sequence, and are coplanar with the array. All manufacturing steps are completed at temperatures less than 400.degree. C.Type: GrantFiled: July 21, 1983Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventor: Jules D. Levine
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Patent number: 4521775Abstract: Two levels of liquid crystal material and upper, center and lower transparent members are sandwiched to form a stacked display. Segment electrodes, which are disposed on opposite sides of the center transparent member, are controllable to selectively display information in one of the two levels while the other level is caused to remain transparent. By applying different waveforms to the levels, one level can be energized while the other is held inactive.Type: GrantFiled: January 14, 1983Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventor: Robert T. Noble
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Patent number: 4521446Abstract: Hydrogen annealing permits deposition of good quality polysilicon atop TiO.sub.2. Hydrogen annealing of TiO.sub.2 prevents the tremendous hydrogen affinity of as-deposited TiO.sub.2 from disrupting process reactions during deposition of polysilicon.Type: GrantFiled: November 30, 1983Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventors: Donald J. Coleman, Jr., Roger A. Haken, Chung S. Wang
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Patent number: 4521852Abstract: A data processing device fabricated on a single semiconductor substrate including nonvolatile memory for the storage of data and instructions, a central processing unit for performing operations on the data, both connected to an information transfer bus to transfer addresses, instructions and data between the memory and the central processing unit. Further included is an external interface connected to the information bus for providing information on the information bus to external devices. Security bits are also provided for designating the security status of information stored in the memory. Address logic is provided that is connected to the information bus to determine when information in the memory is being accessed. An external interface inhibit logic circuit is provided that is connected to the security bit and the address logic to selectively inhibit the operation of the external interface.Type: GrantFiled: June 30, 1982Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventor: Karl M. Guttag
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Patent number: 4521701Abstract: A clock circuit for producing a high-level delayed clock output following an input clock employs an output transistor and pull-down transistor controlling an output node in response to the voltage on a drive node. The input clock is applied to this drive node by a decoupling arrangement, consisting of two series transistors. The first transistor isolates the input charge on a holding node, and the second of the series transistors transfers the charge to the drive node after the desired delay. The output node is held at zero until after the delay, with no unwanted voltage rise, and no d.c. power loss. A large capacitive load can be driven.Type: GrantFiled: September 16, 1982Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventor: Chitranjan N. Reddy
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Patent number: 4520629Abstract: An improved cryogenic refrigerator having a drive mechanism suitable for use with gap or clearance seals is disclosed. The drive mechanism includes two reciprocating members, e.g. piston and regenerator/displacer, driven by a common rotating drive shaft. The regenerator/displacer portion of the drive shaft includes a roller at one end in engagement with a rod base plate for driving a rod connected to the regenerator/displacer and a spring for returning the regenerator/displacer simultaneously with the withdrawal of the drive shaft. The piston portion of the drive shaft is connected to a first end of a hollow body. The second end of the hollow body which is opposite the first end has the piston rigidly affixed thereto. The hollow body has a portion adjacent the first end supported by a guide whereby the piston is substantially isolated from side force loads during reciprocation.Type: GrantFiled: August 26, 1983Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventors: Robert M. Dix, Timothy A. Ellis, Gary W. Andrews
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Patent number: 4521868Abstract: The equation operating system is an improved data and command entry format together with a compatible operation system for use with electronic data processing apparatuses, most particularly with scientific calculators which provide an alphanumeric display of entered equations. This invention provides a different set of commands and displayed characters for performing exponentiation. An up arrow together with a down arrow serve to define the expression of the exponent. The numeric data stored in a numeric display register upon implementation of the exponentiation is raised to the power of the expression between the up arrow and the down arrow. This invention also includes an integral power exponentiation command which enables easy entry of single digit positive integral exponents, thereby eliminating the need for a completing command.Type: GrantFiled: February 29, 1984Date of Patent: June 4, 1985Assignee: Texas Instruments IncorporatedInventors: David Caldwell, Linda J. Ferrio, Arthur C. Hunter