Design and analysis of a low-noise saw-less receiver front-end resistant to strong out-of-band blocker

被引：3

作者：

Mohammadpour, Amin ^{[1
]}

Nabavi, Abdolreza ^{[1
]}

机构：

[1] Tarbiat Modares Univ, Fac Elect & Comp Engn, Tehran 1411713116, Iran

来源：

ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING | 2017年 / 93卷 / 02期

关键词：

Noise cancellation; Blocker resistant; Direct conversion; N-path filter; SAW-less front-end; CMOS; CMOS; LNA;

D O I：

10.1007/s10470-017-1035-y

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Design and analysis of a SAW-less front-end resistant to strong out-of-band blocker is presented which utilizes a main-path containing an LNA along with a 12.5% mixer and a baseband amplifier. Also, it employs an auxiliary-path using a 12.5% mixer and a baseband amplifier. Multiple N-path filtering technique is employed to improve the NF and gain of the front-end in the presence of strong out-of-band blocker. The linearity of LNA, enhanced by series resistors in the LNA inputs, is analyzed by Volterra series analysis. Using noise cancellation technique on this structure relaxes the concern of series resistor noise contribution. Furthermore, new analyses are given for N-pathswitching clock non-idealities, considering overlap and its effect on input matching. Analysis and simulation results, using 0.18 mu m CMOS technology, show about 6 and 5 dB improvement in LNA IIP3 and front-end NF, respectively, when series resistor is added to the LNA and the auxiliarypath is ON.

引用

页码：217 / 235

页数：19

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