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A 402–405 MHz MICS-band wake-up receiver is presented that achieves −63.8 dBm sensitivity at 4.5 nW. High sensitivity at 400 MHz is accomplished via an 18.5 dB passive voltage gain transformer filter loaded by a high input impedance (Rin > 30 kΩ), high scaling factor (kED > 300), 1.8 nW current re-use pseudo-balun envelope detector, while low power is achieved by operating all active circuits,...
This paper presents the design of a fully-integrated ultra-low-power temperature sensor applicable for use in wearable, environmental monitoring, and Internet-of-Things applications. Temperature is transduced in the proposed design by charging a pair of capacitors with proportional to or complementary to (proportional to absolute temperature or complementary to absolute temperature) current sources,...
Wake-up receivers (WuRXs) are low-power radios that continuously monitor the RF environment to wake up a higher-power radio upon detection of a predetermined RF signature. Prior-art WuRXs have 100s of kHz of bandwidth [1] with low signature-to-wake-up-signal latency to help synchronize communication amongst nominally asynchronous wireless devices. However, applications such as unattended ground sensors...
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