← 返回 JSSC 论文列表JSSC 2009第10期Analog Circuits0.18μm
A 0.6-V Dynamic Biasing Filter With 89-dB Dynamic Range in 0.18- /22m CMOS
提出一种动态偏置技术，实现0.6V低电压下89dB动态范围的五阶切比雪夫低通滤波器。
0.18μm CMOS, 0.6V, 443μW, 89dB动态范围, 575pV输出噪声
动态偏置低通滤波器低电压动态范围自动频率调谐
▸动态偏置（DB）技术扩展低电压下的动态范围
▸新型简化方案校正内部节点状态变量变化
▸基于电压控制滤波器（VCF）架构的自动频率调谐系统
Abstract
This paper presents a 100-kHz fifth-order Chebychev low-pass filter (LPF) using the proposed dynamic biasing (DB) technique which enables wide dynamic range under a low-supply voltage. The change of state variables in the internal nodes of the filter can be corrected by using a novel simplified scheme, avoiding the output transient owing to dynamic biasing. The filter, including an automatic frequency tuning system based on the voltage-controlled-filter (VCF) architecture and voltage reference circuit, is fabricated in a 0.18- m standard CMOS technology with a 0.5-V threshold voltage and consumes 443 Wf r o ma power supply of 0.6 V. The output noise and the in-band /73/73/80/51 are 575 p /65/114/109/115and 219 A, respectively. The filter achieves a dynamic range of 89 dB.