A Gm-C bump equalizer for low-voltage low-power applications

被引：0
作者：
Galembeck, R [1 ]
de Lima, JA [1 ]
Schneider, MC [1 ]
机构：
[1] Univ Fed Santa Catarina, Florianopolis, SC, Brazil
来源：
2004 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL 1, PROCEEDINGS | 2004年
关键词：
D O I：
暂无
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 low-voltage low-power 2nd-order CMOS pseudodifferential bump-equalizer is presented. Its topology comprises a bandpass section with adjustable center frequency and quality factor, together with a programmable current amplifier. The basic building blocks are triode-operating transconductors, tunable by means of either a DC voltage or a digitally controlled current divider. The bump-equalizer as part of a battery-operated hearing aid device is designed for a 1.4Vsupply and a 0.35mum CMOS fabrication process. The circuit performance is supported by a set of simulation results, which indicates a center frequency from 600Hz to 2.4kHz, 1less than or equal toQless than or equal to5, and an adjustable gain within +/-6dB at center frequency. The filter dynamic range lies around 40dB. Quiescent consumption is kept below 12muW for any configuration of the filter.
引用
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页码：797 / 800
页数：4
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