An 11-bit, power efficiency, two-stage SAR-voltage-controlled oscillator (VCO) hybrid ADC is proposed in this work. Taking full advantage of the voltage-to-phase and voltage-to-frequency characteristics, the reused ring-VCO circuit acts as not only a time-domain comparator with the phase ...
摘要 本发明涉及一种混合结构SAR‑VCO ADC,包括:粗量化单元、细量化单元和输出单元;其中,所述粗量化单元用于对输入信号进行量化,得到残差信号和第一量化结果;所述细量化单元用于对所述残差信号进行量化,得到第二量化结果;所述输出单元用于根据所述第一量化结果和所述第二量化结果计算最终量化结果。本发明采用两级量...
本发明采用两级量化结构,其第一级由粗量化的SAR ADC结构构成,第二级由细量化的VCO‑based ADC结构构成,即利用VCO‑based ADC的固有噪声整形特性对SAR ADC量化后的剩余量进行细量化。在整体上完成10位量化精度的功能,本发明实施例结合了SAR ADC和VCO‑based ADC的优点,在提升量化精度的同时大大减小了功耗和...
基于VCO比较器振荡数的自适应多旁路窗在SAR ADC中的应用 模数转换器(ADC)是模拟集成电路的核心问题之一,也是我国“卡脖子”的重大需求领域。近年来,逐次逼近(SAR)型ADC由于其高度数字化、功耗低、可并行等特点,在先进工艺下得到了长足的发展,并在高速领域逐步取得明显的优势。但受制于器件匹配,SAR ADC的高精度设计...
NS-SAR ADC将过采样技术和噪声整形技术引入到SAR ADC中,在SAR结构低功耗的基础上大大提高模数转换器的精度,是近年来国内外研究的热点。NS-SAR主要分为两种结构,一种是级联积分器前馈结构,采用FIR和IIR滤波器级联,可以实现较为理想的噪声整形效果[1-2]。2012 年,FREDENBURG J A等人首次将该结构用于传统的SAR ...
We present an OTA-free 1-1 multi-stage noise-shaping (MASH) analog-to-digital converter (ADC) utilizing a fully passive noise-shaping successive approximation register (NS-SAR) as the first stage and an open-loop ring voltage-controlled oscillator (VCO) as the second stage. The key ...
所述第二量化结果计算最终量化结果.本发明采用两级量化结构,其第一级由粗量化的SAR ADC结构构成,第二级由细量化的VCObased ADC结构构成,即利用VCObased ADC的固有噪声整形特性对SAR ADC量化后的剩余量进行细量化.在整体上完成10位量化精度的功能,本发明实施例结合了SAR ADC和VCObased ADC的优点,在提升量化精度的...
SAR-VCO ADCNoise-shapePhase noiseVoltage-controlled oscillator (VCO) quantizerA surface blasting model of rock with pre-existing randomly distributed defects, including voids, pores and small open joints, under blasting loads are established by using finite difference method. A shock equation of state...
SARVCOnonidealitiesbehavioralThis paper presents a novel Nyquist SAR-VCO ADC architecture. To improve the dynamic performance, a 4-phase counter is introduced to the proposed architecture. Thanks to the employed 4-phase counter, requirements on both the counting time error and the nonlinearity of ...
所述第二量化结果计算最终量化结果.本发明采用两级量化结构,其第一级由粗量化的SAR ADC结构构成,第二级由细量化的VCObased ADC结构构成,即利用VCObased ADC的固有噪声整形特性对SAR ADC量化后的剩余量进行细量化.在整体上完成10位量化精度的功能,本发明实施例结合了SAR ADC和VCObased ADC的优点,在提升量化精度的...