Overall, this work achieves 81-dB SNDR over 12.5 MHz with 3.7-mW power, leading to a Schreier FoM of 176 dB. This article presents a hybrid 4th-order delta–sigma modulator (DSM). It combines a continuous-time (CT) loop filter and a discrete-time (DT) passive 2nd-order noise-shaping SAR (NS-SAR).

10.4 A 3.7mW 12.5MHz 81dB-SNDR 4th-Order CTDSM with Single-OTA and 2nd-Order NS-SAR Abstract: A high-order CTDSM can provide high resolution with a small OSR, but its design suffers from a few challenges.

2013年9月24日 · Abstract: An 8b 1.2 GS/s single-channel Successive Approximation Register (SAR) ADC is implemented in 32 nm CMOS, achieving 39.3 dB SNDR and a Figure-of-Merit (FoM) of 34 fJ per conversion step. High-speed operation is achieved by converting each sample with two alternate comparators clocked asynchronously and a redundant capacitive DAC with ...

2022年6月29日 · SFDR 的定义是基本正弦波信号均方根 (RMS) 值与从 0Hz (DC) 到二分之一数据转换器采样速率(如 fs/2) 范围内测得的输出峰值杂散信号均方根值之比。峰值杂散分量可以是谐波关系，也可以是非谐波关系。SFDR 可以使用下列方程计算：SFDR(dBc)=20lg(Funfame_sndr

2022年1月1日 · Overall, this work achieves 81 dB SNDR over 12.5 MHz with 3.7 mW power, leading to a Schreier FoM of 176 dB.

Moreover, this work implements both excess loop delay (ELD) compensation and an input feedforward path inside the NS-SAR in the charge domain, further reducing the circuit complexity and the OTA...

sndr是用于衡量数据转换器的动态性能的关键参数之一，它包含奈奎斯特带宽上的所有噪声和杂散。sndr的表达式为： 其中，信号功率是有用信号、噪声和失真分量的平均功率。

In [2], a 3^rd-order DSM is built with only 1 OTA and a 2^nd-order NS-SAR. Since it is set by device ratios, the NTF of a NS-SAR is PVT-robust. Hence, the 3^rd order DSM stability is equivalent to that of a 1^storder CTDSM, which is easy to ensure.

2010年1月12日 · 關於量測ADC的SNR、SNDR以及thd的數據，我都是在hspice中輸入sin波利用暫態取點存成資料，再給matlab來做運算，我也看過利用hspice直接下fft的方式直接求出那些數值，因此兩種方法都可以，只是matlab功能比較多，因此我比較偏向使用matlab來算那些數值，而大 …

Fabricated in a $180-\mathrm{nm}$ CMOS process, the proposed IC achieves a peak signal-to-noise-and-distortion ratio (SNDR) of 80.8 dB with an OSR of 16 and a 2.5 kHz signal bandwidth (BW), while consuming $5.3 \mu \mathrm{~W}$ from a $1.2-\mathrm{V}$ supply. This results in a Schreier’s figure of merit (FOM) of 167.5 dB.