Accession Number : AD0682353

Title :   AN ASSOCIATIVE PROCESSOR.

Descriptive Note : Interim rept., Jun 66-Dec 67,

Corporate Author : MICHIGAN UNIV ANN ARBOR SYSTEMS ENGINEERING LAB

Personal Author(s) : Feng,Tse-yun

Report Date : JAN 1969

Pagination or Media Count : 162

Abstract : A fully associative processor is proposed in this report. This processor may achieve all the relational, the logic, and the retrieval operations, which should be achieved by any associative system. Furthermore, a possibility of extending the capability of the associative processor to arithmetic operations is also suggested. The operation speeds (in terms of cycle time) for various searches and retrievals are discussed. The proposed system appears, in principle, to have the highest speed for achieving complex searches and for performing ordered retrievals as compared to any other associative system so far proposed. The system is also capable of achieving simple searches in one cycle time and resolving n simultaneous responses in n retrieval cycles. A 4x4 breadboard associative memory using multiaperture cores was constructed and tested. This memory has the noise compensation feature which would greatly increase the memory capacity. The propagation delay and attenuation effects were analyzed in relationship to noise compensation. The above associative memory may also include signal compensation which would provide the memory the ability to detect the neighboring codes of a specific code. Thus, the system reliability can be increased when redundant codes are used. A system of notation was developed so that the search specifications can be expressed in terms of logic equations. A simple language for the system is also suggested. Three magnetic memory devices are proposed. Some experiments were performed on the modified waffle-iron devices. (Author)

Descriptors :   (*MEMORY DEVICES, INFORMATION RETRIEVAL), DATA STORAGE SYSTEMS, SEARCH THEORY, MAGNETIC MATERIALS, COMPUTER LOGIC, RELAXATION OSCILLATORS, NOISE(RADIO)

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE