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An 18-MSs 76-dB SNDR Continuous-Time 16 Modulator Incorporating an Input V oltag
提出一种高线性度连续时间16调制器，采用输入电压跟踪技术消除非线性。
18-MS/s, 76.5-dB SNDR, 93-dB SFDR, 3.21 mW
连续时间调制器高线性度GmC积分器电压跟踪FIR滤波器
▸采用输入电压跟踪技术实现高线性度
▸共享单反馈DAC优化架构
▸集成一阶FIR滤波器的源串联终止DAC
Abstract
This article presents a highly linear continuous-
time (CT) 16 modulator incorporating energy-efficient open-
loop GmC integrators with 1-V ppd full-scale (FS) voltage. The
second-order loop filter is inherently linearized using an input
voltage tracking technique. Here, the modulator input and digital
to analog converter (DAC) feedback signal have the same linear
and non-linear voltage to current conversion. Subtracted in the
current domain in the Gm-stage, the non-linear contributors
are elimi