A 950-MHz IF second-order integrated LC bandpass delta-sigma modulator

被引：37

作者：

Gao, WN ^{[1
]}

Snelgrove, WM ^{[1
]}

机构：

[1] Carleton Univ, Dept Elect, Ottawa, ON K1S 5B6, Canada

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1998年 / 33卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

analog-to-digital converters; continuous-time circuits; delta-sigma modulators; LC resonators; monolithic inductors; wireless IC's;

D O I：

10.1109/4.668987

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A second-order integrated LC bandpass delta-sigma modulator is presented. This modulator is implemented in a 0.5-mu m bipolar process and can be used for digitizing radio frequency or high intermediate frequency signals. It employs an integrated LC resonator with active Q-enhancement and two nonreturn-to-zero digital-to-analog pulse-shaping feedback loops. The modulator test chip achieves a signal-to-noise ratio of 57 dB over a 200-kHz bandwidth for converting a 950-MHz signal, and dissipates 135 mW with a 5-V supply.

引用

页码：723 / 732

页数：10

共 18 条

[1]

CANDY JC, 1992, OVERSAMPLING DELTA S, P1

[2] Signal-dependent timing jitter in continuous-time ΣΔ modulators [J].