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中国科学院微电子研究所专利：一种Sigma-Delta调制器及模数转换器
Quantitative Study of High Dynamic Range Sigma Delta-based Focal Plane Array Architectures
IR focal plane array ROIC high dynamic range vertical integration sigma-delta extended counting
2015/8/17
The paper investigates the suitability of Σ∆ modulation based FPA readout schemes for use in Vertically Interconnected Sensor Arrays requiring ultra high dynamic range and frame rate. It is show...
On Incremental Sigma-Delta Modulation with Optimal Filtering
Sigma-Delta (Σ∆ ) incremental A/D converter optimal filter Σ∆ transfer function time-domain analysis
2015/8/12
The paper presents a quantization-theoretic framework for studying incremental Σ∆ data conversion systems. The framework makes it possible to efficiently compute the quantization intervals and h...
Sigma-Delta微加速度计非理想因素建模与系统级设计
微加速度计 Sigma-Delta 系统级建模 非理想因素
2014/4/28
为了简化Sigma-Delta(ΣΔ)微加速度计接口电路晶体管级的仿真和优化，建立了系统中的非理想因素模型，并在此基础上完成了一种单环结构的ΣΔ微加速度计的系统级设计。分析了敏感结构中固定极板运动、时钟抖动、开关热噪声、运算放大器噪声等非理想因素对系统的影响，并分别建立了Simulink模型。基于所建模型，设计了一种ΣΔ微加速度计的精确的Simulink模型。系统级仿真结果表明：二阶系统的信号-噪...
In this report we describe the design and simulation of a Sigma Delta ADC in Matlan/Simulink
数字滤波器在sigma-delta ADC芯片中占据了大部分芯片面积，该文提出了一种数字滤波器结构，这种结构滤波器采用一个控制单元和一个加法器取代了Hogenauer结构滤波器中差分器的多个加法器，从而减小数字电路的面积。一个采用这种结构的4阶的数字滤波器在CYCLONE II FPGA芯片中被实现，耗费的硬件资源比Hogenauer结构的滤波器减少近29%。
高精度音频多位sigma-delta调制器设计
sigma-delta调制器 开关电容积分器 高精度 多位
2011/1/20
设计一个内部采用4位量化器的二阶单环多位sigma-delta调制器。为解决反馈回路中多位DAC元件失配导致的信号谐波失真问题，该sigma-delta调制器采用CLA(Clocked averaging algorithm)技术提高多位DAC的线性度，同时采用动态频率补偿技术增加积分器的稳定性。调制器信号频率带宽为24 kHz，过采样率(OSR)为128，采用尺寸为0.5 µm的CM...
Sigma-Delta Voltage to Frequency Converter With Phase Modulation Possibility
Sigma-Delta Voltage Frequency Converter Phase Modulation Possibility
2009/7/28
Voltage to frequency converter (VFC) is an oscillator whose frequency is linearly proportional to control voltage. There are two common VFC architectures: the current steering multivibrator and the ch...
A New Approach to Design Low Power Continues-Time Sigma-Delta Modulators
Sigma-delta modulator Current-mode Nonlinear Transconductance
2010/2/2
This paper presents the design of a low power
second-order continuous-time sigma-delta modulator for low power
applications. The loop filter of this modulator has been implemented
based on the nonl...