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Ultra Low Power Wake-Up Radio Using Envelope Detector and Transmission Line Voltage Transformer

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2 Author(s)
Emil Nilsson ; CERES and MPE-lab at the Halmstad University, Halmstad, Sweden ; Christer Svensson

An ultra-low power wake-up radio receiver using no oscillators is described. The radio utilizes an envelope detector followed by a baseband amplifier and is fabricated in a 130-nm complementary metal-oxide-semiconductor process. The receiver is preceded by a passive radio-frequency voltage transformer, also providing 50 Ω antenna matching, fabricated as transmission lines on the FR4 chip carrier. A sensitivity of -47 dBm with 200 kb/s on-off keying modulation is measured at a current consumption of 2.3 μ A from a 1 V supply. No trimming is used. The receiver accepts a -13 dBm continuous wave blocking signal, or modulated blockers 6 dB below the sensitivity limit, with no loss of sensitivity.

Published in:

IEEE Journal on Emerging and Selected Topics in Circuits and Systems  (Volume:3 ,  Issue: 1 )