A Very Linear Low-Pass Filter with Automatic Frequency Tuning

被引：14

作者：

Galan, J. ^{[1
]}

Pedro, M. ^{[1
]}

Sanchez-Rodriguez, T. ^{[1
]}

Munoz, F. ^{[2
]}

Carvajal, R. G. ^{[2
]}

Lopez-Martin, A. ^{[3
]}

机构：

[1] Univ Huelva, Dept Elect Engn, E-21071 Huelva, Spain

[2] Univ Seville, Escuela Super Ingn, E-41092 Seville, Spain

[3] Univ Publ Navarra, Dept Ingn Elect & Elect, E-31006 Pamplona, Spain

来源：

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS | 2013年 / 21卷 / 01期

关键词：

Analog CMOS circuits; direct-conversion receivers; frequency tuning; Gm-C filters; linear transconductors; CMOS; TRANSCONDUCTOR; RANGE;

D O I：

10.1109/TVLSI.2011.2181880

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

A Gm-C third-order Chebyshev low-pass filter with a novel switched capacitor frequency tuning technique for a zero-IF Bluetooth receiver has been designed. The frequency tuning scheme is simpler and has more relaxed specifications than conventional ones. Furthermore, a highly linear pseudo-differential transconductor with a compact feedback loop able to operate with low supply voltage has been used. This control loop holds the input transistors in triode region and provides high output resistance, keeping high linearity in a wide range of transconductance. The filter bandwidth is 0.5 MHz and the overall scheme consumes 1.1 mA from a 1.8-V supply. The measured third-order intermodulation (IM3) distortion of the filter for a 1 Vpp two-tone signal centered at 300 kHz is -65 dB.

引用

页码：182 / 187

页数：6

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