A high-speed functional memory with a capability of Hamming-distance-based data search by dynamic threshold logic circuits

This paper presents a new functional memory with a high-speed flexible data search capability. In addition to the conventional function of the exact-match data search, the proposed memory is capable of retrieving the address of stored data within a given Hamming-distance from an input data. By using the proposed dynamic threshold logic circuit, a single cycle search operation is achieved. The proposed memory macro has been fabricated using a 0.35-µm CMOS technology to verify its feasibility and functionality. The measured results show that the proposed memory operates correctly.