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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 60-mW 200-MHz continuous-time seventh-order linear phase filter with on-chip automatic tuning system
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A 60-mW 200-MHz continuous-time seventh-order linear phase filter with on-chip automatic tuning system

机译：具有片上自动调谐系统的60mW 200MHz连续时间七阶线性相位滤波器

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摘要

A full CMOS seventh-order linear phase filter based on gm-C biquads with a -3-dB frequency of 200 MHz is realized in 0.35-Μm CMOS process. The linear operational transconductance amplifier is based on complementary differential pairs in order to achieve both low-distortion figures and high-frequency operation. The common-mode feedback (CMFB) employed takes advantage of the filter architecture; incorporating the load capacitors into the CMFB loop improves further its phase margin. A very simple automatic tuning system corrects the filter deviations due to process parameter tolerances and temperature variations. The group delay ripple is less than 5% for frequencies up to 300 MHz, while the power consumption is 60 mW. The third-harmonic distortion is less than -44 dB for input signals up to 500 mVpp. The filter active area is only 900 × 200 Μm2. The supply voltages used are ±1.5 V.
机译：在0.35μmCMOS工艺中实现了基于gm-C双二阶，具有200MHz -3-dB频率的全CMOS七阶线性相位滤波器。线性运算跨导放大器基于互补差分对，以实现低失真度和高频工作。采用的共模反馈（CMFB）利用了滤波器架构。将负载电容器纳入CMFB环路可进一步改善其相位裕度。一个非常简单的自动调整系统可以校正由于工艺参数公差和温度变化引起的过滤器偏差。对于高达300 MHz的频率，群延迟纹波小于5％，而功耗为60 mW。对于高达500 mVpp的输入信号，三次谐波失真小于-44 dB。过滤器的有效面积仅为900×200μm2。使用的电源电压为±1.5V。

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