Methods of improving the signal-to-noise ratio of photon and electron beam accessed magnetic film memory system
Abstract
Abstract METHODS ARE DESCRIBED FOR REDUCING BACKGROUND NOISE IN MAGNETIC-FILM MEMORIES WHICH ARE TO BE READ MAGNETOOPTICALLY WITH THE AUXILIARY AID OF AN ELECTRON BEAM. IN SUCH MEMORIES THE PRINCIPAL SOURCE OF BACKGROUND NOISE IS FROM THE LIGHT WHICH IS USED TO ILLUMINATE THE MEMORY ARRAY. THE PRESENT INVENTION MAKES USE OF A SELECTIVE BACKGROUND AND THE TEMPERATURE CONTROL OF MAGNETO-OPTICAL SPECTRA IN RARE-EARTH IRON GARNETS, WHICH OFFER HIGHLY SATISFACTORY SOLUTION TO THE ARRAY NOISE PROBLEM. IN ADDITION, THE PROPERTIES OF THE REAR-EARTH IRON GARNETS ARE SUCH THAT THE FUNDAMENTAL SIGNAL-TO-NOISE RATIO FOR A SINGLE BIT IS IMPROVED BY SEVERAL ORDERS OF MAGNITUDE WHEN COMPARED TO PREVIOUSLY CONSIDERED SYSTEMS.
Inventors
- 👤 Donald O Smith
Bibliographic Details
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