USA As Represented by Secretary of the Navy

Wallace E Anderson

Leonard J Schwee

Albert D Krall

Albert M Syeles

Ronald N Lee

Yuan-Jye Liu

Henry R Irons

Daniel I Gordon

Oscar J Van Sant

Oscar J Vansant

A process and a small, sensitive, low noise, high gain, power amplifier used in the process, for exploiting the anisotropic magnetoresistance effect in a ferromagnetic thin-film. The magnetization of the thin-film is biased to lie along the hard axis. The amplifier is configured so that a sensing current in the thin-film flows at an angle of forty-five degrees to the nominal direction of magnetization, and the current to be amplified produces a magnetic field parallel to the easy axis of the thin-film.

Magnetoresistive power amplifier

A magnetic crosstie memory using a plurality of Permalloy thin-film strips of uniform thicknesses having parallel denticulated margins etched to align with the oblong axis of the strip. Each pair of opposite denticles defines a distinct memory cell. Magnetization relaxes upon removal of a magnetic field applied normal to the oblong axis of the thin-film with each component assuming that orientation requiring the least rotation for parallel alignment with the least distant edge. Two domains are thus formed with a domain wall suitable for storage and propagation of binary information centered between the margins and extending the length of the strip. Crossties form at the necks of the serrations and Bloch lines are positioned in potential wells between the necks. Binary information, represented by the crosstie and Bloch lines in various conventions is propagated along the domain wall from cell to cell by particular sequences of magnetic pulses.

Serriform strip crosstie memory

A symmetric narrow-wide electrical conductor for propagating binary information represented by Bloch line - crosstie pairs along a serriform crosstie thin magnetic film strip. Another conductor is made with alternate segments disposed upon opposite surfaces of the crosstie strip.

Field determined cross-tie memory propagation circuit

A magnetoresistance detector linearly stretching single bits of binary inmation such as those represented by Bloch line - crosstie pairs, along the major dimension of a thin magnetic film strip such as a serriform crosstie memory. The detector circuit is overlaid upon the thin magnetic film strip. In a selected area, less pronounced serrations in the adjacent margins, in conjunction with a magnetic field created by current through the detector circuit enable Bloch lines entering the area to travel farther. A series of oriented open segments in the overlain section of the detector circuit, arranged in symmetric correspondence with serrations in the adjacent margins, enhances the difference between logical zero and one signals in the detector circuit.

Crosstie memory bit stretcher detector

A microstrip board comprising a gold film which contains about at least 1/2 weight per cent of aluminum bonded to a non-electrical conducting oxide is prepared by simultaneously evaporating the gold and aluminum onto the non-electrical conducting oxide and thereafter optionally heating the film thus formed.

Method of bonding gold films to non-electrically conducting oxides and

A conformal electronically scanned antenna array system utilizing an inve Butler matrix in combination with directive antenna elements. The system provides a simple and inexpensive device for scanning an elemental array without the problems of output frequency shift or mutual coupling between antenna elements.

Conformal radar antenna

A modified Huggin's Scanner whose tunable signal bandwidth can be broadened ithout affecting the beam position and whose output beam direction is dependent on the control of a resistor. Two separate voltage controlled oscillators are utilized in this system in addition to modifying the input frequency controls to the scanner.

Growing community of inventors

Beltsville, MD, United States of America

Wallace E Anderson