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引用次数: 3
摘要
本文提出了一种低功率轨对轨温度补偿电压频率转换器(VFC)，它构成了针对便携式应用(如无线传感器网络)的传感器读出接口的最后阶段。对0.18 μ m - 1.2 V CMOS VFC ASIC实现的结果表明，输入范围为(0 - 1.2 V)，输出频率范围为(0.1 - 1.0 MHz)，足以在传感器节点微控制器中使用直接计数方法对信号进行数字化。该VFC在正常工作时功耗为60 μ W，在休眠模式下功耗为35 nW，并且在温度范围(- 40、120°C)内对温度不敏感。
Voltage-to-frequency converter for low-power sensor interfaces
This paper presents a low-power rail-to-rail temperature compensated voltage-to-frequency converter (VFC) which constitutes the last stage of a sensor read-out interface targeting portable applications, such as wireless sensor networks. Results for a 0.18 µm – 1.2 V CMOS VFC ASIC implementation show for an input range of (0 – 1.2 V) an output frequency range of (0.1 – 1.0 MHz), adequate to digitize the signal with the direct counting method in the sensor node microcontroller. The proposed VFC has a power consumption of 60 µW in normal operation, 35 nW in sleep mode, and it is temperature insensitive for a temperature range of (−40, 120 °C).
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