Showing papers on "Decoupling (electronics) published in 1982"

Partial memory selection using a programmable decoder

Abstract: A technique for providing a partial memory of one half of the possible storage bits comprised of any two quadrants is implemented by decoupling the one of four decoder used for normal operation and providing a programmable decoder which is capable of being programmed to select one of any two quadrants. If only one quadrant is to form the partial memory, the programmable decoder can be programmed to select only one latch. In another embodiment, a decoder is provided which can also be programmed to select one of any three quadrants.

Disturbance decoupling by high gain feedback

Abstract: Asymptotic disturbance decoupling (ADD), a concept which is suitable for the study of the effects of high gain feedback on disturbance decoupling, is introduced in this note. We show that the conditions for ADD are the conditions for exact disturbance decoupling due to Wonham and Morse for a reduced order system.

Protective circuit arrangement for a sheathed heating element

Abstract: A protective circuit arrangement for sheathed heating elements which interrupts ground fault conditions by effectively decoupling the power line from the heating element regardless of the polarity of the power supply connections. A fusible link couples each side of the heating element to the power supply. A normally open switch responsive to current in the ground path switches a relatively low resistance shunt current path across the heating element when the ground current exceeds a predetermined threshold level. Closure of the shunt path enables sufficient current to flow in the power supply lines to actuate the fusible links. Circuit parameters are selected such that the current in the fusible link coupled to the hot power line is sufficiently greater than that in the fusible link coupled to the neutral line to cause the hot power line fusible link to be actuated first, thereby interrupting the fault condition and decoupling the hot power line from the heating element.

The triangular decoupling problem for nonlinear control systems

Abstract: sequentially, i.e. Cl controls zI, possibly changing the values ~2, . . , zp. then Liz controls ZZ, possibly changing the values of ~3, . . , zp, with the requirement that z1 be left unaffected and so forth, with d, controlling zp without influencing zl, . . , zp_, (‘here the Li, are vectors such that ul, . . . , u,) = (cl, . . . 6,)). For linear systems the -triangular Decoupling Problem has been solved completely, sed [3, 11, 12,211. In the solution we present here we use as key tools the so called regular controllability distributions, introduced in [14]. In this way our approach completely fits in the systematic work on the generalization of the geometric approach to linear systems, see e.g. [6-10, 13-181. Note that in the T.D.P. the partial decoupling of the outputs is weaker than achieving complete dynamic interacting, which for a special case-the Restricted Decoupling Problem-has been solved in [16].

Electrically alterable non-volatile memory

Abstract: A non-volatile memory and method is described incorporating an array of variable threshold transistors, a row decoder, a buffer circuit positioned between the array and row decode circuitry, column decode circuitry, and a sense amplifier. The non-volatile memory overcomes the problem of high voltages in the memory array during READ operation. During READ operation the variable threshold transistors operate in the common source mode. A buffer circuit with level shift capability is described incorporating P and N channel transistors. A sense amplifier with decoupling during sensing or lock out is described incorporating P and N channel transistors.

Belt drive for machine for resurfacing vehicle brake discs

Abstract: Apparatus for resurfacing vehicle brake discs by machining opposite sides of the brake disc by a pair of tools and in which the tools can be moved by a lead screw and including a motor which is coupled to the lead screw by a belt for driving it and including means for decoupling the motor to the lead screw including means for loosening the belt so it will not drive the lead screw.

Assignment of the 13C nuclear magnetic resonance spectra of three 27‐hydroxyfriedelanes

Abstract: 13C NMR spectra of 27-hydroxyfriedelane, kokoonol (27-hydroxyfriedelan-3-one) and kokoononol (27-hydroxyfriedelan-3,21-dione) have been recorded and signals assigned using the off-resonance decoupling, inversion recovery and lanthanide induced shift techniques.

Seeker-body decoupling system

Abstract: An improved airframe body decoupling system for a body gimballed sensor on an interceptor aircraft or guided missile. Body rate gyro information is employed for internal decoupling so as to eliminate decoupling match sensitivity to receiver errors. The true measure of sensor position from the gimballed antenna potentiometer is differentiated and then externally decoupled to produce the desired line-of-sight rate for use by the guidance/control section of the proportional navigation guidance system.

B.S.T.J. brief: Fabrication and properties of single-mode optical fiber exhibiting low dispersion, low loss, and tight mode confinement simultaneously

Abstract: Single-mode fiber with a new index profile design has been fabricated The design allows the decoupling of bandwidth related factors from considerations which affect curvature-induced losses

On the Input—Output Decoupling of 2-D Systems by State Feedback

Abstract: The problem of designing a linear state feedback controller for single-input single-output decoupling of linear multivariable 2-D (two-dimensional) systems is discussed. A method is presented for the determination of the decoupling controller matrices which, when applied to the open-loop system, yield a closed-loop system whose transfer function matrix is diagonal and nonsingular. Necessary and sufficient conditions are established for the state feedback decoupling problem to have a solution. Two examples are included to illustrate the proposed decoupling method.

An Application of MACSYMA to Nonlinear Systems Decoupling

Abstract: A MACSYMA implementation of a method to obtain decoupling of nonlinear systems by means of state-feedback is presented. The cases of rejection of disturbances and noninteracting control are treated.

Disturbance Decoupling Problem in Decentralized Linear Multivariable Systems

Abstract: This paper solves the disturbance decoupling problem in decentralized control systems. The general case is considered where no assumption is made on the number of sub systems. The necessary and sufficient conditions are given under which disturbance decoupling is possible by applying local state feedback laws.

Arrangement for packing high-speed integrated circuits, including decoupling capacitors for the power input terminals, and method for realizing it.

Abstract: not available for EP0000384Abstract of corresponding document: US4153988A high performance package for integrated circuit semiconductor devices in which decoupling capacitors are provided in close proximity to the integrated circuit devices for reducing voltage variations in the power driver lines, and/or a ground plate overlying the stripe metallurgy on the surface of the substrate for reducing cross-talk between signal lines. The decoupling capacitors are each comprised of a conductive layer on the inside of a via hole, a concentric dielectric layer on the conductive layer, and an electrically conductive plug in physical contact with the dielectric layer that is associated with the driver line circuitry of the package.

13C-NMR. Spectra of Natural and Semi-synthetic Cannabinoids

Abstract: The 13C-NMR. spectra of one natural and ten semi-synthetic cannabinoids were analyzed in detail. Assignments of the signals are based on their chemical shifts, splitting patterns in 1H-off-resonance decoupling experiments and comparison with 13C-NMR. data of related cannabinoids. With some compounds final assignments were made by selective 1H-decoupling experiments and incremental calculations.

Electrical plug and socket couplings

Abstract: A multiple pin electrical plug and socket has a fixed part (10) mounted in a wall (W) and a decouplable part (11). The decouplable part 11 is engaged by a lever (12) which can effect initial decoupling and final coupling and can support the decouplable part at pads (16) engaging flats (17) when initially decoupled. The lever (12) is gravity supported on pivots (13) and can be lifted away from the coupling so that a complete decoupling can be effected unimpeded by the lever.

Phosphorus-31 two-dimensional n.m.r. spectroscopy: broadband homonuclear decoupling in polyphosphorus compounds

Abstract: The 31P two-dimensional n.m.r. spectrum of a mixture of selenides of 1,1,2-tris (diphenylphosphino) ethane can be used to effect broadband homonuclear decoupling of very large splittings, and permits ready assignment of the resonances from individual species.

Approximated decoupling control of coupled-core nuclear reactor

Abstract: An application of approximated decoupling control to a coupled-core nuclear reactor is described, which permits noninteractive regulation of the power level in the individual cores of a reactor that requires to be controlled with account taken of the interference between the cores. The control possesses the advantages of easy design and simple struc-ture of an approximated decoupling controller.The controller is constituted of a precompensator and an output feedback compensator. The control function is ensured with the precompensator playing a key role in approxi-mately diagonalizing an open-loop transfer-function matrix in the frequency range of interest. The precompensator is devised by pseudo-diagonalization, the method being generalized by the authors for application to a wide frequency range.Digital simulations and graphical studies based on the Gershgorin band analysis demon-strate the effectiveness of the approximated decoupling controller as well as the applicability of the generalized pseudo-diagonalization method. Sample results are compared with those obtained by the decoupling theory.

Approximate disturbance decoupling by measurement feedback

Abstract: The purpose of this paper is to outline, in a self-contained style, but without giving details of the proofs, the necessary and sufficient condition for the solvability of the approximate disturbance problem by measurement feedback (ADDPM) for linear finite-dimensional time-invariant systems.