← 返回 JSSC 论文列表JSSC 2009第8期RF & Wireless0.18μm CMOS
A Highly Linear SAW-Less CMOS Receiver Using a Mixer With Embedded Tx Filtering
使用嵌入式滤波无源混频器的高线性度SAW-less CMOS接收器
Rx IIP3 >60 dBm, 噪声系数2.4 dB, Tx抑制比15 dB, 功耗18 mA@2.1V
SAW-less接收器嵌入式滤波CMOS高线性度Tx抑制
▸创新点1：嵌入式滤波无源混频器（电路创新）。该混频器通过在无源混频器中嵌入滤波功能，实现了对发射信号的高效抑制，无需使用SAW滤波器，显著提升了接收器的线性度和Tx抑制比。
▸创新点2：高Tx抑制比（系统创新）。通过嵌入式滤波无源混频器，接收器在900 MHz频率下实现了15 dB的额外Tx抑制，显著改善了IIP3和三次谐波失真（TB）性能，分别提升了10 dB和30 dB。
▸创新点3：低功耗设计（系统创新）。接收器在2.1 V电源下仅消耗18 mA电流，结合高效的电路设计，实现了低功耗运行，适用于移动通信设备等对功耗敏感的应用场景。
▸创新点4：差分LNA与主动后失真技术（电路创新）。采用差分低噪声放大器（LNA）并结合主动后失真（APD）技术，进一步提升了接收器的线性度和噪声性能，噪声系数低至2.4 dB。
Abstract
An embedded filtering passive (EFP) mixer is used to
overcome transmitter power leakage in a receiver without the use
of a SA W filter. The receiver IC exhibits more than
/4360 dBm of
Rx IIP/50, 2.4 dB Rx noise figure, and /4377 dB of Triple Beat (TB)
with 45 MHz offset transmit leakage at 900 MHz Rx frequency
while consuming only 18 mA from a 2.1 V supply. Thanks to the
embedded filtering passive mixer , the proposed receiver IC shows
an additional 15 dB Tx rejection compared to a conventional re-