JSSC 2012第11期Data Converters0.13μm CMOS

A 190- W zero-IF GFSK Demodulator With a 4-b Phase-Domain ADC Jens Masuch Studen

本文提出了一种基于相位域ADC的低功耗零中频GFSK解调器，适用于BLE标准。

190μW功耗, 0.14mm²面积, 74dB动态范围, 1Mbps数据速率

零中频GFSK解调器相位域ADC蓝牙低功耗电流域处理

▸采用相位域ADC直接量化信号相位

▸无电阻电流域相位旋转方案

▸集成可编程增益放大器和符号判决模块

Abstract

This paper presents a zero-IF Gaussian fre- quency-shift keying (GFSK) de modulator based on a phase-do- main analog-to-digital converter (Ph-ADC) which directly quantizes the phase information of the received complex baseband signal. The Ph-ADC linearly comb ines the in-phase and quadra- ture parts of the incoming signal, and the generated phase-shifted versions are fed to comparators t o detect the zero-crossings and build a 4-b digital representation of the signal phase. Seeking for a low-are