Associative-Search Bubble Devices for Content-Addressable Memory and Array Logic

Bubble latches (switches with memory capability) provide very simple associative-search devices in shift-register type memories. Such devices allow a simple implementation of content-addressable memories (CAM's), only requiring small addition of area, circuits, and interconnections to those of a conventional shift-register memory. Moreover, such devices, in combination with a multi-input or circuit, implements a versatile logic array.