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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A -80 dB THD, 4 V/sub pp/ switched capacitor filter for 1.5 V battery-operated systems
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A -80 dB THD, 4 V/sub pp/ switched capacitor filter for 1.5 V battery-operated systems

机译:适用于1.5 V电池供电系统的-80 dB THD,4 V / sub pp /开关电容滤波器

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摘要

A fully differential fifth-order SC filter that can operate from power supplies as low as 1.5 V featuring a -80 dB THD up to 4 V/sub pp/ output voltage is presented. A measured p-weighted noise of 120 /spl mu/V/sub rms/ leads to a dynamic range of 81.5 dB. This circuit is used as reconstruction filter for a low voltage 14-b DAC. The very low voltage operation has been possible by integrating a regulated voltage-multiplier on the same chip. The filter active area is 0.54 mm/sup 2/ in a 0.8 /spl mu/m CMOS technology. Typical power consumption is 0.8 mW at 1.5 V supply.
机译:提出了一种全差分五阶SC滤波器,该滤波器可以使用低至1.5 V的电源供电,具有-80 dB的THD,最高可达4 V / sub pp /输出电压。测得的p加权噪声为120 / spl mu / V / sub rms /,动态范围为81.5 dB。该电路用作低压14-b DAC的重建滤波器。通过在同一芯片上集成稳压倍压器,可以实现非常低的电压。在0.8 / spl mu / m CMOS技术中,滤波器的有效面积为0.54 mm / sup 2 /。 1.5 V电源时的典型功耗为0.8 mW。

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