公开(公告)号：US20090168575A1

公开(公告)日：2009-07-02

申请号：US12402037

申请日：2009-03-11

Applicant: Jason MESSIER

Inventor： Jason MESSIER

IPC: G11C7/02 ,  H03K19/003

CPC classification number: G06F17/5045

Abstract: By reducing a cumulative number of drivers changing values during a transition, the cumulative current change may be reduced, along with the simultaneous switching noise effects. Also, a reduced cumulative current change can also reduce voltage fluctuations in ground and/or power planes of a chip, thereby minimizing potential improper logic functions due to voltage dips or spikes. In one implementation, the method includes reading values of a first state of a first set of bits of a first word and obtaining a projected value of a second state of each of the first set of bits. If the first switching noise cumulative effect can be reduced by changing the projected values of the second state of the first set of bits, an alternate set of values having at least one value differing from the projected values of the second state is determined to reduce the first switching noise cumulative effect.

Abstract translation: 通过减少在转换期间改变值的驱动器的累积数量，可以减少累积电流变化以及同时的开关噪声效应。 此外，减小的累积电流变化还可以减小芯片的接地和/或电源平面中的电压波动，从而最小化由于电压骤降或峰值引起的潜在的不正确的逻辑功能。 在一个实现中，该方法包括读取第一字的第一组位的第一状态的值并获得第一组位中的每一个的第二状态的投影值。 如果可以通过改变第一组位的第二状态的投影值来减小第一开关噪声累积效应，则确定具有与第二状态的投影值不同的至少一个值的一组替代值，以减少 首先开关噪声累积效应。