公开(公告)号：US06836234B1

公开(公告)日：2004-12-28

申请号：US10665618

申请日：2003-09-22

申请人： Hongwei Wang

发明人： Hongwei Wang

IPC分类号： H03M166

CPC分类号： H03K17/04106 ,  H03K17/04123

摘要： A system (e.g., a digital-to-analog converter (DAC)) includes a digital section and an analog section. The digital section has a driver portion that generates drive signals based on received respective digital input signals. The drive signals are received at respective switches in the analog section. The driver portion includes logic gates that are used to generate the drive signals, such that a rise and fall time of complementary pairs of drive signals are substantially equal. The driver portion can optionally include an acceleration system to accelerate the rise and fall times of the drive signals. The switches generate respective analog signals from the drive signals.

摘要翻译： 系统（例如，数模转换器（DAC））包括数字部分和模拟部分。 数字部分具有基于接收的相应数字输入信号产生驱动信号的驱动器部分。 在模拟部分的相应开关处接收驱动信号。 驱动器部分包括用于产生驱动信号的逻辑门，使得互补驱动信号对的上升和下降时间基本相等。 驱动器部分可以可选地包括加速系统以加速驱动信号的上升和下降时间。 开关从驱动信号产生相应的模拟信号。

公开(公告)号：US06836232B2

公开(公告)日：2004-12-28

申请号：US10335519

申请日：2002-12-31

申请人： Lin-Kai Bu

发明人： Lin-Kai Bu

IPC分类号： H03M166

CPC分类号： G09G3/3611 ,  G09G3/3685 ,  G09G3/3696 ,  G09G2310/027 ,  G09G2310/0297 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2330/021

摘要： A gamma correction apparatus for a liquid crystal display comprises a reference voltage generating circuit and a gamma correction circuit. The reference voltage generating circuit outputs a plurality of reference voltages according to the pixel data. The gamma correction circuit gamma-corrects the pixel data according to the reference voltages. The feature of the invention resides in that the reference voltage generating circuit outputs the corresponding reference voltages to gamma-correct the pixel data according to the positions of the pixels corresponding to the pixel data in the LCD monitor and the display colors of the pixels.

摘要翻译： 用于液晶显示器的伽马校正装置包括参考电压产生电路和伽马校正电路。 参考电压产生电路根据像素数据输出多个参考电压。 伽马校正电路根据参考电压伽玛校正像素数据。 本发明的特征在于，参考电压发生电路根据与LCD监视器中的像素数据对应的像素的位置和像素的显示颜色，输出​​相应的参考电压以对像素数据进行伽马校正。

公开(公告)号：US06833801B1

公开(公告)日：2004-12-21

申请号：US10724645

申请日：2003-12-01

申请人： Geir Sigurd Ostrem ,  Paul W. Kalthoff

发明人： Geir Sigurd Ostrem ,  Paul W. Kalthoff

IPC分类号： H03M166

CPC分类号： H03M1/0678 ,  H03K17/04106 ,  H03M1/742

摘要： Low distortion current switches for high speed current steering digital-to-analog converters. The current switches use a compensation method for improving the spurious peformance of a CMOS current steering DAC for high output frequencies caused by the capacitance of the common node of the switch transistors. For this purpose, a replica switch is provided, with the voltage change on the common node of the replica switch being used to provide a corresponding charge to the common node of the main switch in an amount equal to the charge needed to change the voltage on the common node of the main switch by the same amount as the voltage change on the common node of the replica switch. Multiple embodiments are disclosed.

摘要翻译： 低失真电流开关用于高速电流转向数模转换器。 电流开关使用补偿方法来改善由CMOS开关晶体管的公共节点的电容引起的高输出频率的CMOS电流转向DAC的杂散性能。 为此，提供了复制开关，其中副本开关的公共节点上的电压变化用于向主开关的公共节点提供相当于电荷变化所需的电荷量的相应电荷 主开关的公共节点与复制开关的公共节点上的电压变化相同。 公开了多个实施例。

公开(公告)号：US06819277B1

公开(公告)日：2004-11-16

申请号：US10604896

申请日：2003-08-25

申请人： Jen-Yi Hu ,  Wein-Town Sun

发明人： Jen-Yi Hu ,  Wein-Town Sun

IPC分类号： H03M166

CPC分类号： H03M1/682 ,  H03M1/765

摘要： A method is used for reducing spikes in a digital-to-analog converter (DAC), which includes a plurality of digit circuits for transforming a digital voltage signal into an analog voltage signal. The method includes receiving the digital voltage signal, setting the digit circuit corresponding to a predetermined bit of the digital voltage signal closest to an output module, and outputting an analog voltage signal corresponding to the digital voltage signal, wherein the predetermined bit of the digital voltage signal is the bit with least signal variation among the bits of the digital voltage signal.

摘要翻译： 一种用于减少数模转换器（DAC）中的尖峰的方法，数模转换器（DAC）包括用于将数字电压信号变换为模拟电压信号的多个数字电路。 该方法包括接收数字电压信号，设置与最接近输出模块的数字电压信号的预定位相对应的数字电路，并输出对应于数字电压信号的模拟电压信号，其中数字电压的预定位 信号是在数字电压信号的位之间具有最小信号变化的位。

公开(公告)号：US06812877B2

公开(公告)日：2004-11-02

申请号：US10410412

申请日：2003-04-09

申请人： Marco Bachhuber ,  Ralf-Rainer Schledz

发明人： Marco Bachhuber ,  Ralf-Rainer Schledz

IPC分类号： H03M166

CPC分类号： H03M1/687 ,  H03M1/765

摘要： An apparatus converts a digital value including “a” bits into an analog signal and has 2b D/A converters. Here, b is an integer number that is greater than 0. Each of the D/A converters is designed to convert a digital value having “a−b” bits. The digital value that is supplied (for i=1 . . . 2b) to the ith D/A converter for the purpose of D/A conversion corresponds to the “a−b” most significant bits in the sum of the digital value that will be converted by the apparatus and to i−1. The output signal for the apparatus is the mean value for the output signals from the D/A converters. Such an apparatus can be produced such that it can be accommodated easily and efficiently on a semiconductor chip and, irrespective of the details of protocol implementation, permits a completely linear conversion of the digital value being converted into an analog signal.

摘要翻译： 一种装置将包括“a”位的数字值转换为模拟信号并具有2×D / A转换器。 这里，b是大于0的整数.D / A转换器被设计成转换具有“a-b”位的数字值。 为了D / A转换，为第i个D / A转换器提供的数字值（对于i = 1 ... 2）对应于数字值之和中的“ab”最高有效位 将由设备和i-1转换。 该设备的输出信号是来自D / A转换器的输出信号的平均值。 可以制造这样的装置，使得其可以容易且有效地容纳在半导体芯片上，并且无论协议实现的细节如何，允许将被转换为模拟信号的数字值完全线性转换。

公开(公告)号：US06781536B1

公开(公告)日：2004-08-24

申请号：US10436408

申请日：2003-05-12

申请人： Marcus M. Martins

发明人： Marcus M. Martins

IPC分类号： H03M166

CPC分类号： H03M1/682 ,  H03M1/765

摘要： A dual-stage DAC system is provided that includes a coarse resistor network having a first portion and a second portion that provide a plurality of segment voltages. The coarse resistor network is coupled to a fine resistor network that provides a plurality of tap output voltages corresponding to a selected segment voltage. The output of the fine resistor network can be provided to an amplifier that sets a reference voltage in addition to buffering the output of the fine resistor network. A predetermined current is coupled to one of the first portion and the second portion of the coarse resistor network based on the segment voltage selected.

摘要翻译： 提供了一种双级DAC系统，其包括具有提供多个段电压的第一部分和第二部分的粗略电阻器网络。 粗电阻网络耦合到精细电阻器网络，其提供对应于所选择的段电压的多个抽头输出电压。 可以将精细电阻网络的输出提供给放大器，该放大器除了缓冲精细电阻网络的输出之外，还设置参考电压。 基于选择的段电压，预定电流耦合到粗电阻网络的第一部分和第二部分之一。

公开(公告)号：US06778118B2

公开(公告)日：2004-08-17

申请号：US10428620

申请日：2003-05-02

申请人： Friedrich Heizmann ,  Maximilian Erbar

发明人： Friedrich Heizmann ,  Maximilian Erbar

IPC分类号： H03M166

CPC分类号： H03M1/0665 ,  H03M1/747 ,  H03M3/502 ,  H03M7/165

摘要： The invention relates to a method for converting a digital signal an analogue signal and to a digital to analogue converter comprising means for converting a digital signal to a thermometer coded signal, means for randomizing the thermometer coded signal, means for controlling the means for randomizing based on the digital signal and means for converting the randomized signal to analogue.

摘要翻译： 本发明涉及一种将模拟信号的数字信号转换成数模转换器的方法，包括将数字信号转换为温度计编码信号的装置，用于随机化温度计编码信号的装置，用于控制用于随机化的装置的装置 对数字信号和用于将随机信号转换为模拟的装置。

公开(公告)号：US06771200B2

公开(公告)日：2004-08-03

申请号：US10407647

申请日：2003-04-03

申请人： Massimiliano Frulio ,  Stefano Sivero ,  Simone Bartozi ,  Sabina Mognoni

发明人： Massimiliano Frulio ,  Stefano Sivero ,  Simone Bartozi ,  Sabina Mognoni

IPC分类号： H03M166

CPC分类号： H02M3/073 ,  G11C5/145 ,  G11C16/30 ,  H02M2001/0025

摘要： A DAC-based voltage regulator system for a non-volatile memory device comprises a charge pump circuit having an enable input and a voltage output node. A voltage-to-current converter has an input coupled to the voltage output node and an output coupled to a virtual ground node. A current source is coupled to the virtual ground node and sinks one of a plurality of currents in response to states of a plurality of digital input signals. A transconductance amplifier has an inverting input at the virtual ground node, a non-inverting input coupled to a reference voltage potential, and an output. A comparator has a first input coupled to the output of the transconductance amplifier, a second input coupled to a reference voltage potential, and an output coupled to the enable input of said charge pump.

摘要翻译： 用于非易失性存储器件的基于DAC的电压调节器系统包括具有使能输入和电压输出节点的电荷泵电路。 电压 - 电流转换器具有耦合到电压输出节点的输入和耦合到虚拟接地节点的输出。 电流源耦合到虚拟接地节点并且响应于多个数字输入信号的状态而吸收多个电流中的一个电流。 跨导放大器在虚拟接地节点处具有反相输入，耦合到参考电压电位的非反相输入和输出。 比较器具有耦合到跨导放大器的输出的第一输入，耦合到参考电压电位的第二输入和耦合到所述电荷泵的使能输入的输出。

公开(公告)号：US06771199B2

公开(公告)日：2004-08-03

申请号：US10408446

申请日：2003-04-08

申请人： Todd L. Brooks ,  David S. P. Ho ,  Kevin L. Miller ,  Eric Fogleman

发明人： Todd L. Brooks ,  David S. P. Ho ,  Kevin L. Miller ,  Eric Fogleman

IPC分类号： H03M166

CPC分类号： H03M1/067 ,  H03M1/74 ,  H03M1/742 ,  H03M3/464 ,  H03M3/502

摘要： Methods and apparatuses for spectrally shaping mismatch errors in a multi-bit digital to analog converter (DAC). In an embodiment, the multi-bit DAC is constructed from K separate multi-element sub-DACs, where K and the number of elements in each sub-DAC are each preferably greater than two. A received digital input code is split into a set of K sub-codes corresponding to the digital input code. The set of K sub-codes can have one of at least N different sub-code orders that specify an order of each of the K sub-codes with respect to one another, where N>2. A sum of the K sub-codes equals the digital input code. One of the at least N different sub-code orders is selected using a shuffling algorithm. Then, each sub-code in the set of K sub-codes is output in accordance with the selected sub-code order.

摘要翻译： 用于在多位数模转换器（DAC）中频谱整形失配误差的方法和装置。 在一个实施例中，多位DAC由K个分离的多元件子DAC构成，其中K和每个子DAC中的元件数量优选大于2。 接收的数字输入码被分割成与数字输入码相对应的一组K个子码。 所述K个子代码集合可以具有至少N个不同的子代码顺序中的一个，其指定相对于彼此的K个子代码中的每一个的顺序，其中N≥2。 K个子码的总和等于数字输入码。 使用混洗算法来选择至少N个不同的子代码顺序之一。 然后，根据所选择的子代码顺序输出K个子代码集合中的每个子代码。

公开(公告)号：US06768440B1

公开(公告)日：2004-07-27

申请号：US10402401

申请日：2003-03-28

申请人： Bruce Troutman

发明人： Bruce Troutman

IPC分类号： H03M166

CPC分类号： H03M1/68 ,  H03M1/804

摘要： A digital-to-analog converter (DAC) converts a digital signal into an analog signal. The DAC comprises a first capacitor network, a second capacitor network, a first amplifier, and a second amplifier. The first capacitor network includes at least one capacitor that has a weighted capacitance value. Similarly, the second capacitor network includes at least one capacitor that has a weighted capacitance value. The first amplifier has an input that couples to the first capacitor network. The first amplifier also has an output that couples to, and drives, the second capacitor network. The second amplifier has an input that couples to the second capacitor network. The output of the second amplifier constitutes the analog signal.

摘要翻译： 数模转换器（DAC）将数字信号转换为模拟信号。 DAC包括第一电容器网络，第二电容器网络，第一放大器和第二放大器。 第一电容器网络包括具有加权电容值的至少一个电容器。 类似地，第二电容器网络包括具有加权电容值的至少一个电容器。 第一放大器具有耦合到第一电容器网络的输入。 第一放大器还具有耦合到第二电容器网络并驱动第二电容器网络的输出。 第二放大器具有耦合到第二电容器网络的输入。 第二放大器的输出构成模拟信号。