A CMOS 140-mW fourth-order continuous-time low-pass filter stabilized with a class AB common-mode feedback operating at 550 MHz

被引：33

作者：

Pandey, P ^{[1
]}

Silva-Martinez, J ^{[1
]}

Liu, XM ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Elect Engn, Analog & Mixed Signal Ctr, College Stn, TX 77843 USA

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2006年 / 53卷 / 04期

关键词：

common-mode feedback (CMIFB); continuous-time filters; low-distortion circuits; operational transconductance amplifiers (OTAs); OTA-C filters;

D O I：

10.1109/TCSI.2005.859621

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A 550-MHz linear-phase low-pass continuous-time filter is described. The operational transconductance amplifier (OTA) is based on complementary differential pairs in order to achieve high-frequency operation. A common-mode feedback (CMFB) based on a Class AB amplifier with improved stability at high frequencies is introduced. Results for the stand alone OTA show a unity gain frequency of 1 GHz while the excess phase is less than 5 degrees. The filter is based on G(m)-C biquads and achieves IM3 < -40 dB for a two-tone input signal of -10 dBm each. The power consumption of the fourth-order filter is 140 mW from supply voltages of +/- 1.65 V. The chip was fabricated in a standard 0.35-mu m CMOS technology.

引用

页码：811 / 820

页数：10

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