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1.5 V Sub‐mW CMOS Interface Circuit for Capacitive Sensor Applications in Ubiquitous Sensor Networks
Sungsik Lee Ahra Lee Chang‐Han Je Myung‐Lae Lee Gunn Hwang Chang‐Auck Choi 《ETRI Journal》2008,30(5):644-652
In this paper, a low‐power CMOS interface circuit is designed and demonstrated for capacitive sensor applications, which is implemented using a standard 0.35‐μm CMOS logic technology. To achieve low‐power performance, the low‐voltage capacitance‐to‐pulse‐width converter based on a self‐reset operation at a supply voltage of 1.5 V is designed and incorporated into a new interface circuit. Moreover, the external pulse signal for the reset operation is made unnecessary by the employment of the self‐reset operation. At a low supply voltage of 1.5 V, the new circuit requires a total power consumption of 0.47 mW with ultra‐low power dissipation of 157 μW of the interface‐circuit core. These results demonstrate that the new interface circuit with self‐reset operation successfully reduces power consumption. In addition, a prototype wireless sensor‐module with the proposed circuit is successfully implemented for practical applications. Consequently, the new CMOS interface circuit can be used for the sensor applications in ubiquitous sensor networks, where low‐power performance is essential. 相似文献
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CMOS图像传感器研究 总被引:4,自引:0,他引:4
结合CMOS图像传感感器的研究背景,从5个方面对CMOS图像传感器与CCD图像传感器的优缺点进行了比较,重点分析了CMOS图像传感器的结构、工作原理以及影响传感器性能的主要因素,并给出了相应的解决方法。最后,预测CMOS图像传感器的技术发展趋势。 相似文献