公开(公告)号：WO2015112383A1

公开(公告)日：2015-07-30

申请号：PCT/US2015/011264

申请日：2015-01-13

Applicant: SANDISK TECHNOLOGIES INC.

Inventor： NGUYEN, Qui Vi ,  CHOI, Steve

IPC: G11C13/00 ,  G11C5/14

CPC classification number: G11C5/145 ,  G11C13/0038 ,  G11C2013/0092 ,  H03K4/023

Abstract: Methods for controlling a ramp rate of an output voltage derived from one or more charge pumps and reducing variation in the ramp rate due to process, voltage, and temperature (PVT) variations are described. In some embodiments, the ramp rate of the output voltage from one or more charge pumps may be controlled using a ramp rate control circuit that uses a digital counter to adjust (or step up) the output voltage from the one or more charge pumps based on a ramp rate schedule. The ramp rate schedule may specify varying output voltage levels for the one or more charge pumps during a time period in which the output voltage charges up from a first voltage to a second voltage greater than the first voltage.

Abstract translation: 描述了用于控制从一个或多个电荷泵导出的输出电压的斜坡速率并减少由于过程，电压和温度（PVT）变化引起的斜坡速率变化的方法。 在一些实施例中，可以使用斜坡率控制电路来控制来自一个或多个电荷泵的输出电压的斜坡率，所述斜坡率控制电路使用数字计数器来调整（或升高）来自所述一个或多个电荷泵的输出电压，基于 坡度计划。 斜坡速率调度可以在输出电压从第一电压充电到大于第一电压的第二电压的时间段期间为一个或多个电荷泵指定变化的输出电压电平。