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This paper proposes a compact DC-DC buck converter with low output power and very low quiescent current dissipation for use in an ultra-capacitor based wireless sensor networks (WSNs) nodes. This converter is controlled by a self-oscillation topology in order to achieve less silicon area and lower quiescent dissipation than the conventional designs. The work is implemented in the standard 0.35um CMOS...
Recently, we start to see Wireless Sensor Network (WSN) solutions on the market, which are mostly based on 802.15.4 standard or Zigbee equivalent. Most of these solutions integrate an 8-bit to 32-bit low power microcontroller, one or multiple sensors and run on batteries. However, business is not yet there massively. Does it mean we need additional innovation to boost market adoption? The aim of this...
This paper describes an ultra-low-power RF transceiver implemented as part of a system-on-chip. The transceiver operates in the 868/915 MHz frequency band using binary FSK modulation at a 45 kbit/s data rate. It achieves -89 dBm receiver sensitivity and -6 dBm transmitter output power while consuming 1.6 mA and 1.8 mA, respectively, from a 1.2 to 1.5 V supply. It is fabricated in 0.13 mum CMOS occupying...
This paper presents RF microsystems constituted by low-power devices for use in wireless sensors networks. As it is expected, the major emphasis is given to the fabrication of RF transceivers for integration in these microsystems. Features like low-power and low-voltage operations are discussed, at the same time are presented RF transceivers for the frequencies of 433 MHz, 2.4 GHz and 5.7 GHz, in...
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