A 500-NA 6TH-ORDER BANDPASS SC FILTER

被引：28

作者：

CASTELLO, R ^{[1
]}

GRASSI, AG ^{[1
]}

DONATI, S ^{[1
]}

机构：

[1] SGS THOMSON MICROELECTR,I-20041 AGRATE BRIANZA,ITALY

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1990年 / 25卷 / 03期

关键词：

D O I：

10.1109/4.102659

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 sixth-order bandpass switched-capacitor (SC) filter that requires only 500 nA of total supply current has been designed and fabricated in a 2-pm CMOS technology. The filter is part of an implantable device powered by a ± 1.2-V battery; it can drive up to 30 pF of capacitive load and uses a 2-kHz sampling frequency. A substantial reduction in the power consumption has been achieved by using a novel amplifier time-sharing technique that allows the realization of an arbitrary number of biquadratic cells with only two amplifiers. Further power saving was obtained with the use of positive feedback in the amplifier input stage to enhance its transconductance. The prototype chip requires, an area of 2200 mils2. © 1990 IEEE

引用

页码：669 / 676

页数：8

共 16 条

[1] SIMPLIFIED MOS SWITCHED CAPACITOR LADDER FILTER STRUCTURES [J].