SEMICONDUCTOR MEMORY

摘要

PURPOSE:To prevent a malfunction of a timing control circuit which is due to the noise produced from an electric power supply line by making use of the action timing signal of a data output buffer to make a edge trigger circuit blind when the actuation is started. CONSTITUTION:An edge detection signal phi is supplied to a timing control circuit TG with variation of an address signal to produce a series of required timing signals. Plural data output buffers are started all at once when a timing signal phiop which starts a data output buffer has the rise in a reading mode. In this case, an edge trigger circuit EG is made blind with a timing signal phidk produced from an AND circuit which receives the signal phiop and a delay signal phiop' of the inverse signal of the signal phiop. Therefore the signal phi is never transmitted to the circuit TG in such a case where a malfunction is produced by the noise of a power supply line due to a fact that plural data output buffers are started all at once.