Title :
An Ultralow-Power Receiver for Wireless Sensor Networks
Author :
Ayers, James ; Mayaram, Kartikeya ; Fiez, Terri S.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR, USA
Abstract :
An ultralow-power super-regenerative receiver for BFSK modulated signals has been designed and fabricated in a standard 0.18-μm CMOS process. The use of BFSK modulation allows the receiver to operate at higher data rates and also gives an approximate 3-dB SNR performance increase over the more traditional OOK modulation. A fast calibration scheme and the absence of an external inductor make it ideal for ultralow-power sensor networks. A power consumption of 215 μW from a 0.65-V supply and an area of 0.55 mm2 make it ideal for highly integrated energy harvesting sensor nodes. At 2 Mb/s, the receiver consumes 0.18 nJ/b, making it the lowest energy integrated super-regenerative receiver to date.
Keywords :
CMOS integrated circuits; energy harvesting; frequency shift keying; radio receivers; wireless sensor networks; BFSK modulated signals; CMOS process; OOK traditional calibration scheme; SNR performance; external inductor; integrated energy harvesting sensor nodes; integrated super-regenerative receiver; power 215 muW; power consumption; size 0.18 mum; ultralow-power super regenerative receiver; voltage 0.65 V; wireless sensor networks; Impedance matching; Inductors; Oscillators; Receivers; Varactors; Wireless sensor networks; Binary frequency-shift keying; RF; digitally-controlled oscillator; low power; low voltage; super-regenerative receiver; wireless sensor networks;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2010.2056850
