图2比较了ADC的奈奎斯特操作、过采样方案和Σ-Δ调制(也是过采样)方案。图2. Nyquist comparison 图2a...
这可能会影响到最终ADC/DAC的谐波失真、THD等参数。反观1bit DAC，虽说量化噪声大了点，但它可是绝对线...
低电压高分辨率二阶sigmadelta型ADC的研究、设计与实现
economic comparisonThis chapter discusses the design of the analog-to-digital converter (ADC) of a precision smart temperature sensor. This ADC converts the voltages V BE and Δ V BE(generated using the techniques...doi:10.1007/1-4020-5258-8_4Michiel A.P. Pertijs...
ADC can take on only a fi nite number of possible values, the amplitude of each sample can be represented by a digital code whose bit length determines the total number of possible converter outputs. T e fi nite number of output values in Continuous-Time Sigma-Delta A/D Converters — ...
Sigma-delta ADC converters are used almost exclusively in applications that require high-resolution output, such as high-fidelity audio or industrial measurements. To achieve the required high resolution, the analog signal must be sampled at rates much higher than the Nyquist ra...
Flg,4SNRComparisonbetweenSDADCarldASDAI)Catthemodulatorout口ut 图5所示为图4在输人满幅附近的放大,和二 阶sDADc相比,AsDADc克服了满幅附近由于过 载而引起的sNR值大幅下降(约48dB)的问题,使 输入动态范围扩大至满幅. 万方数据 第8期 段营.等:二阶sigm矿DeltaADc自适应量化算法及电路实现 1377 ∞...
Thoroughly revised and expanded to help readers systematically increase their knowledge and insight about Sigma-Delta Modulators Sigma-Delta Modulators...
“C1/C2times”. In other words, in comparison with other integrators, only the initial-stage integrator utilizes a large integration capacitor C2when configuring the filter. Namely, the load connected to the I/O terminals increases only in the initial-stage integrator, resulting in the need to ...
Although an exact comparison is difficult, the SC nature of a sampled-input ADC does necessi- tate higher-speed amplifiers than does a CT∑Δ implementation, leading to higher power dissipation for a pipeline or DT∑Δ ADC in general. The lack of a need for high-speed settling in CT∑Δ...