← 返回 JSSC 论文列表JSSC 2013第5期RF & Wireless
A Wideband Receiver With Resonant Multi-Phase LO and Current Reuse Harmonic Reje
提出一种采用谐振多相LO和电流复用谐波抑制技术的宽带低功耗SDR接收机
0.7-3.2GHz, 1.3V, 10-12mW, NF=7dB
软件定义无线电多相本振谐波抑制电流复用宽带接收机
▸创新点1：谐振非重叠LO驱动技术（系统创新） - 采用互补LC-tank VCO直接驱动8相位12.5%占空比LO，通过谐振消除混频器栅电容影响，显著降低功耗（1.8mW）同时实现0.7-3.2GHz宽调谐范围
▸创新点2：电容共享技术扩展接收频率范围（电路创新） - 在混频器基带侧采用电容共享架构，在不增加功耗前提下将8相位时钟的接收频率范围扩展2倍，噪声系数低至7dB
▸创新点3：四通道基带放大器电流复用设计（电路创新） - 通过多路径基带放大器共享偏置电流，在1.3V电源下仅消耗1.8mW功耗，同时实现>34dB的3/5次谐波抑制能力
▸创新点4：噪声-功率联合优化方法（方法创新） - 通过谐振LO驱动与电流复用放大器协同设计，在10-12mW总功耗下实现宽频带（2.5GHz）覆盖，达成能效与噪声系数（7dB）的帕累托优化
Abstract
In this work we present an architecture for a low
power SDR which draws on techniques from both narrowband
low power radios and recent wor k in SDRs. The receiver con-
sists of a wide tuning-range pass ive mixer, driven with resonant
non-overlapping LO drive combined with a noise-power optimized
multi-path baseband ampli fier. LO generation circuitry drives the
mixer with an 8-phase, 12.5% duty cycle LO, but does so directly
from complementary LC-tank VCOs in order to resonate out the
gate capaci