SEMICONDUCTOR MEMORY AND COMPUTER SYSTEM USING THE SAME

• Main Author: USAMI MASAMI
• Format: Patent
• Language: English
• Published: 22.11.1996
• Edition: 6
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION STORAGE; PHYSICS; STATIC STORES

PURPOSE: To provide a semiconductor memory and a computer system capable of reducing variations of an access time of RAM, etc., by reducing a difference between the maximum access time and the minimum access time by means of delaying the minimum access time. CONSTITUTION: A latch circuit for an address signal, a memory array, a sense amplifier, further, a delay circuit for a clock signal, a pulse width adjusting circuit for the delayed clock signal, etc., constitute a RAM, and a current switch circuit 8 consisting of a differential amplifier 6 for detecting level change of the output data outputted from the memory cells, a level adjusting circuit 7 for adjusting the output level, and in addition current switch circuit 8 consisting of D-type flip-flop circuit are added to a sense amplifier 3 and constitute it. A mode is switched over to a hold mode or a through mode and an output data outputted from the memory cells in the hold mode is held for a prescribed time and outputted.