A semiconductor memory device includes a refresh timer for generating a refresh clock pulse, a binary counter for generating a predetermined number of signals of different frequencies and a circuit for generating a self-refresh enable signal in response to the signal transmitted from the binary counter....http://www.google.es/patents/US5315557?utm_source=gb-gplus-sharePatente US5315557 - Semiconductor memory device having self-refresh and back-bias circuitry
Semiconductor memory device having self-refresh and back-bias circuitry
