公开(公告)号：US20110156935A1

公开(公告)日：2011-06-30

申请号：US12964228

申请日：2010-12-09

Applicant: Jian Hua Zhao ,  Yuan Yuan ,  Yuxing Zhang

Inventor： Jian Hua Zhao ,  Yuan Yuan ,  Yuxing Zhang

IPC: H03M7/16

CPC classification number: H03M1/685 ,  H03M1/765

Abstract: For high resolution resistor string DACs, a resistor string is placed in an array of columns and rows, each resistor tap is connected to a switch network, and a decoder is used to select switches to be closed such that sub-DAC voltage comes from the resistor taps connected to the selected switches. The voltages from each row of the resistor string are fed into a multiplexer, wherein the multiplexer produces an output voltage. A method and apparatus are disclosed for implementing the reflective nature of Gray code to design a DAC such that all the switches in a column of the resistor string may be controlled with only one control signal, thereby reducing extra routing costs, surface area, and dynamic power consumed by the circuit.

Abstract translation: 对于高分辨率电阻串DAC，电阻串被放置在列和行的阵列中，每个电阻抽头连接到开关网络，并且解码器用于选择要闭合的开关，使得子DAC电压来自 电阻抽头连接到选定的开关。 电阻串的每行的电压被馈送到多路复用器中，其中多路复用器产生输出电压。 公开了一种用于实现格雷码的反射特性以设计DAC的方法和装置，使得可以仅使用一个控制信号来控制电阻串的列中的所有开关，从而降低额外的布线成本，表面积和动态 电路消耗的功率。

公开(公告)号：US20110018510A1

公开(公告)日：2011-01-27

申请号：US12823101

申请日：2010-06-24

Applicant: Sarah Gao ,  David Peng

Inventor： Sarah Gao ,  David Peng

IPC: G05F1/575

CPC classification number: G05F1/575

Abstract: A linear voltage regulator includes a Miller frequency compensation having a movable zero, which tracks the frequency of the load pole as the load condition changes. The compensated voltage regulator maintains stability under variable load conditions. Because of the Miller effect, DC open-loop gain and bandwidth are not sacrificed for stability. The compensated voltage regulator can therefore maintain high power supply rejection ratio (PSRR).

Abstract translation: 线性电压调节器包括具有可移动零点的米勒频率补偿，其随着负载条件改变而跟踪负载极的频率。 补偿电压调节器在可变负载条件下保持稳定。 由于米勒效应，DC稳定性不会牺牲直流开环增益和带宽。 因此，补偿电压调节器可以保持高电源抑制比（PSRR）。