公开(公告)号：US20150009772A1

公开(公告)日：2015-01-08

申请号：US13936512

申请日：2013-07-08

Applicant: ARM Limited

Inventor： Wang-Kun CHEN ,  Yew Keong CHONG ,  Sriram THYAGARAJAN ,  Gus YEUNG

IPC: G11C5/14

CPC classification number: G11C11/417 ,  G11C5/148

Abstract: A memory has a normal mode and a power saving mode. The memory has bitline precharge circuitry which during the normal mode selectively couples a pair of bitlines to a precharge node to charge the bitlines to a given voltage level. During the power saving mode the bitlines are isolated from the precharge node. Voltage control circuitry is provided to maintain the precharge node at a first voltage level during the normal mode and at a second voltage level less than the first voltage level during the power saving mode. By reducing the voltage level at the precharge node during the power saving mode, the amount of inrush current occurring when switching from power saving mode to normal mode can be reduced, and this enables the wakeup time to be reduced when returning from power saving mode to normal mode.

Abstract translation: 存储器具有正常模式和省电模式。 存储器具有位线预充电电路，其在正常模式期间选择性地将一对位线耦合到预充电节点，以将位线充电到给定的电压电平。 在省电模式期间，位线与预充电节点隔离。 提供电压控制电路以在正常模式期间将预充电节点保持在第一电压电平，并且在省电模式期间处于小于第一电压电平的第二电压电平。 通过在省电模式下减小预充电节点处的电压电平，可以减少从省电模式切换到正常模式时所产生的浪涌电流量，并且能够在从省电模式返回时减少唤醒时间 正常模式。