A Tunable CMOS Resistor with Wide Tuning Range for Low Pass Filter Application

被引：0
|
作者：
Ma, Desheng [1 ]
Wilamowski, Bogdan M. [1 ]
Dai, Foster Fa [1 ]
机构：
[1] Auburn Univ, Auburn, AL 36849 USA
来源：
2009 TOPICAL MEETING ON SILICON MONOLITHIC INTEGRATED CIRCUTS IN RF SYSTEMS, DIGEST OF PAPERS | 2009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：
In this paper, a new tunable CMOS resistor is proposed. The resistance is inversely proportional to bias current, to provide the resistor with a wider tuning range. And transistors, composing the active resistor, work at saturation region to achieve very large resistance within a small area. As an example, a low pass RC filter using tunable CMOS resistor realized in 0.5-mu m CMOS technology is reported. The measured result shows that the cutoff frequency of low pass filter can be widely tuned from 5 kHz to 1.9 MHz. The total harmonic distortion (THD) stays lower than 40 dB for an input signal up to 100mV Vp-p at 500-kHz input frequency. The die area of the low-pass filter is 0.254.13 mm(2) and the maximum power consumption (at fc=1.9 MHZ) is 5.7mW with single 3.3-V power supply.
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页码：116 / 119
页数：4
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