By performing buffering and data storage in parallel, propagation delays in the SAR logic circuit may advantageously be reduced, and thus, conversion time of a successive-approximation-register (SAR) analog-to-digital converter (ADC) may be advantageously reduced.Pedro W. Neto...
根据ADC的使用方式,选择电压基准电路的使用方式,可以在保证性能的前提下,兼具电源电压低、功耗低、应用灵活的优点。 1 SAR ADC基本原理 图1所示为电荷型SAR ADC的基本架构[1]。SAR ADC的基本结构包含一个比较器、一个数字模拟转换器(Digital-Analog Convertor,DAC)和一个逐次逼近控制器(SAR Logic)。DAC采用电荷按...
SAR ADC(逐次逼近型模数转换器)是一种常用的模数转换器电路,具有高精度和低功耗的特点。它通过逐次逼近的方式,将模拟信号转换为数字信号。 SAR ADC的典型电路结构如下: 1.采样保持电路(Sample and Hold Circuit):用于将输入的模拟信号进行采样并保持,在转换过程中保持信号的稳定性。采样过程发生在采样脉冲的上升沿,...
若Logic Expression仅需要两个Mode Indication 1与Mode Indication 2的逻辑组合,当然理论上可支持n个单一表达式的逻辑组合,取决于实际情况的需要。 Mode Condition 1: X == 3; Mode Condition 2: Y == 4; Logic Expression A = (Mode Condition 1 (OR或AND或XOR或NAND)Mode Condition 2 ); 模式规则(ModeRu...
e Reference Voltage Successive Approximation Register (SAR) Analog to Digital Converter (ADC) with Switchable Reference VoltageSuccessive Approximation Register (SAR) Analog to Digital Converter (ADC) with Switchable Reference VoltageAn ADC is disclosed. The ADC includes a SAR logic circuit, a DAC, a...
上述的处理器1001可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤...
andlowpowerconsumptioninNoise-shapingSARADC.TheSARADCcircuit consistsofbootstrappedswitch,comparator,digital-to-analogconverter(DAC) capacitorarrayandsuccessiveapproximationregister(SAR)logiccircuit.Noise shapingmethodisaddedtotheSARADC.Thestepsofnoiseshapingincludesampling, shapingandsummingoftheresidualvoltage.Theshapi...
1.2 NS-SAR ADC 的发展历程 逐次逼近型(SAR)ADC 电路结构由比较器, DAC,采样开关和 SAR Logic 构成,大部分是数字电 路,具有结构简单和低功耗的优势.但是由于受到比 较器噪声和电容阵列失配等非理想因素的影响,SAR 2.1 NS-SAR ADC 的理论基础 噪声整形技术源于 Sigma-Delta ADC,利用负反馈的 原理,通过在 ...
circuit design.Successivelyalarge-scalelogicdesign oftheinterfaceboardbasedon FPGAis investigated,including theworkflowofthe systemhardware,thechip configuration anduse,thedata exchangebetweenthesystemboardsandtheazimuth pre-processordesign.Finallysomeconclusionsaredrawn. Keyword:FPGA ADCDACDSPUSBFLASH 西安电子科技...
input signal Vin, if Vin>Vdac, the MSB bit is set (logic 1 or high logic), if not, the MSB bit is set to 0 (zero or low logic), the next highest (MSB-1) bit is then set and the process repeats until the LSB bit is tested. The SAR logic circuit102then outputs digital output...