A 75 MHz BW 68dB DR CT-ΣΔ Modulator with Single Amplifier Biquad Filter and A Broadband Low-power Common-gate Summing Technique

被引：0

作者：

Briseno-Vidrios, Carlos ^{[1
]}

Edward, Alexander ^{[1
]}

Shafik, Ayman ^{[1
]}

Palermo, Samuel ^{[1
]}

Silva-Martinez, Jose ^{[1
]}

机构：

[1] Texas A&M Univ, Analog & Mixed Signal Ctr, College Stn, TX USA

来源：

2015 SYMPOSIUM ON VLSI CIRCUITS (VLSI CIRCUITS) | 2015年

关键词：

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

A wide bandwidth, power efficient continuous-time Sigma Delta modulator (CT Sigma Delta M) is presented. The modulator introduces a 3rd order filter implemented with a lossless integrator and a multiple-feedback (MFB) single-amplifier biquad (SAB) with embedded loop stability compensation. An active summing block is implemented with a common-gate amplifier followed by a transimpedance amplifier (TIA) that achieves optimum bandwidth (BW) vs power consumption tradeoff, making it suitable for over GHz operation. Fabricated in 40 nm CMOS, and clocked at 3.2 GHz, the CT Sigma Delta M achieves a signal-to-noise and distortion ratio (SNDR) of 64.9 dB over 75 MHz BW while consuming 22.8 mW of power. The obtained Walden's Figure of Merit (FoM) is 106 fJ/conv-step.

引用

页数：2