The invention is a dynamic storage device requiring periodic refresh, and including logical operation circuitry within the refresh circuitry. The individual storage positions of the storage device are periodically read by a refresh amplifier, and then a logical operation is performed on the refresh data...http://www.google.fr/patents/US5184325?utm_source=gb-gplus-shareBrevet US5184325 - Dynamic associative memory with logic-in-refresh
