公开(公告)号：WO2013052329A1

公开(公告)日：2013-04-11

申请号：PCT/US2012/057301

申请日：2012-09-26

Applicant: SANDISK TECHNOLOGIES INC.

Inventor： NGUYEN, Qui Vi ,  ARIKI, Takuya ,  PARK, Jongmin

IPC: G11C8/08 ,  G11C16/08

CPC classification number: G11C8/08 ,  G11C16/08 ,  G11C16/12

Abstract: A level shifter circuit is presented that can apply a negative voltage level (VBB at TrFG) to non-selected blocks while still being able to drive a high positive level (VRDEC) when selected. An exemplary embodiment presents a negative level shifter that is not susceptible to low voltage pfet breakdown. This allows for a high voltage level shifter (transfer gate) that can drive a negative level for unselected blocks and, when enabled for a selected block, can still drive a positive high voltage level. By using a pair of low voltage PMOS device (M9, M10) whose n-wells share the same level as other PMOS transistors in the design, layout area can be minimized. The gates of this pair of PMOSs (M9, M10) are connected to VSS, thereby preventing these low voltage PMOS devices from thin oxide breakdown.

Abstract translation: 提出了一种电平移位器电路，其可以在未选择的块上施加负电压电平（VBB，TrFG），同时在选择时仍能够驱动高电平（VRDEC）。 一个示例性实施例提出了不易受低电压pfet击穿影响的负电平转换器。 这允许可以为未选择的块驱动负电平的高电压电平移位器（传输门），并且当被选择的块被使能时，仍然可以驱动正的高电压电平。 通过使用一对在设计中n阱与其他PMOS晶体管具有相同电平的低电压PMOS器件（M9，M10），布局面积可以最小化。 这对PMOS（M9，M10）的栅极连接到VSS，从而防止这些低电压PMOS器件发生薄氧化物击穿。

公开(公告)号：WO2013043269A2

公开(公告)日：2013-03-28

申请号：PCT/US2012/050087

申请日：2012-08-09

Applicant: SANDISK TECHNOLOGIES INC. ,  NGUYEN, Qui Vi ,  HTOO, Khin ,  HUYNH, Jonathan Hoang

Inventor： NGUYEN, Qui Vi ,  HTOO, Khin ,  HUYNH, Jonathan Hoang

IPC: A61C1/14 ,  A61C1/05

CPC classification number: G11C16/30 ,  G11C5/145 ,  G11C16/06 ,  H02J1/102 ,  H02M3/07 ,  H02M2003/077 ,  H02M2003/1566

Abstract: A charge pump system uses a dynamic switching approach, where the pump connections are independent of the load for each output. One large pump is designed to be shared between all of the outputs for use during the ramp up during recovery, with each output level also have one designated pump to maintain its level when under regulation. For a three output example, this corresponds to one large and three small pumps. Each small pump is designed with capability that can maintain its output at its regulation level. Each of these pumps can be tailored to the corresponding output level, such as the number of stages being higher in the pump to supply the higher output level. The large pump unit is constructed to be ample to provide sufficient drive to be able to assist in the ramp up phase for all of the outputs and has as many switches needed to connect the pump with all the needed outputs.

Abstract translation: 电荷泵系统使用动态切换方法，其中泵连接独立于每个输出的负载。 一个大型泵被设计为在恢复期间在加速期间使用的所有输出之间共享，每个输出水平还具有一个指定的泵，以在调节时保持其水平。 对于三个输出示例，这对应于一个大型和三个小型泵。 每个小型泵都设计有能够将其输出保持在其调节级别的能力。 这些泵中的每一个可以根据相应的输出电平进行调整，例如在泵中提供较高输出电平的级数较高的级数。 大型泵单元被构造成足以提供足够的驱动以能够帮助所有输出的升降阶段，并且具有将泵连接到所有所需输出端所需的许多开关。

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。

公开(公告)号：WO2013043268A2

公开(公告)日：2013-03-28

申请号：PCT/US2012/050077

申请日：2012-08-09

Applicant: SANDISK TECHNOLOGIES INC. ,  NGUYEN, Qui Vi ,  PHAM, Trung

Inventor： NGUYEN, Qui Vi ,  PHAM, Trung

IPC: G05F1/10

CPC classification number: G11C5/145 ,  G11C16/00 ,  G11C16/12 ,  G11C16/30 ,  G11C29/021 ,  G11C29/028 ,  H02M3/07 ,  H02M2001/0025

Abstract: A regulator system for a charge pump system divides the binary decoding into two branches. One controls a set of parallel connected resistors for fine output voltage steps. The other branch controls a serial resistor to provide the large step size. For example, a 9-bit digital input signal is split into 2 least significant for the fine adjustment and the other 7 bits for the larger adjustments. In the example of a 50mV step size, in one current path 2 bits of the binary input then control two parallel resistors for 50mV and 100mV step size, and in the other current path 7 bits are used for one-hot-decode control serial resistors to provide a 200mV step size. A unity gain operational amplifier and a high voltage device are added in between the two branches to decouple the parasitic capacitance of large parallel resistors from the other elements. Thus, the sensing node consequently has less parasitic capacitance and is more sensitive to output level movement, resulting in less ripple at the output node.

Abstract translation: 用于电荷泵系统的调节器系统将二进制解码分为两个分支。 一个控制一组并联的电阻器，用于精细的输出电压阶跃。 另一个分支控制串联电阻以提供大的步长。 例如，9位数字输入信号被分成2个最小的微调，而另外7位用于较大的调整。 在50mV步长的示例中，在一个电流路径中，二进制输入的2位然后控制50mV和100mV步长的两个并联电阻，而在另一个电流通路中，7位用于单热解码控制串行电阻 以提供200mV步长。 在两个分支之间增加一个单位增益运算放大器和一个高压器件，以将大并联电阻器的寄生电容与其他元件去耦。 因此，感测节点因此具有较小的寄生电容并且对输出电平移动更敏感，从而导致在输出节点处较少的纹波。

公开(公告)号：WO2013036342A1

公开(公告)日：2013-03-14

申请号：PCT/US2012/050011

申请日：2012-08-08

Applicant: SANDISK TECHNOLOGIES INC. ,  NGUYEN, Qui Vi ,  HUYNH, Jonathan Hoang

Inventor： NGUYEN, Qui Vi ,  HUYNH, Jonathan Hoang

IPC: H02M3/07 ,  G11C5/14

CPC classification number: H02M3/07 ,  G11C5/145 ,  H02M2001/009

Abstract: A charge pump system can provide multiple regulated output levels, including several concurrently, in an arrangement that can reduce the area and power consumption of such a high voltage generation system. The charge pump system can be dynamically reconfigurable based on output requirements. When output level is low, but required for a large AC, DC load, the system is configured in parallel to share the load. When a higher output is required, such as for a programming in a non-volatile memory, the system is configured in serial to generate the desired high output level. The exemplary embodiment uses all of the pump units in each operation and, hence, is able to be optimized for smaller pump area and less power consumption, while still delivering the same pump ability as larger, more power consuming arrangements.

Abstract translation: 电荷泵系统可以提供多个稳定的输出电平，包括几个同时，可以减少这种高压发电系统的面积和功率消耗的布置。 电荷泵系统可以根据输出要求动态重新配置。 当输出电平低，但是需要大的交流，直流负载时，系统并联配置以共享负载。 当需要更高的输出时，例如用于非易失性存储器中的编程时，系统被串行配置以产生期望的高输出电平。 示例性实施例在每个操作中使用所有的泵单元，因此能够针对较小的泵浦面积和较少的功率消耗进行优化，同时仍然以更大的，更耗电的装置提供相同的泵能力。