title: A 540-[Formula: see text] Duty Controlled RSSI With Current Reusing Technique for Human Body Communication.
abstract: An ultra-low-power duty controlled received signal strength indicator (RSSI) is implemented for human body communication (HBC) in 180 nm CMOS technology under 1.5 V supply. The proposed RSSI adopted 3 following key features for low-power consumption; 1) current reusing technique (CR-RSSI) with replica bias circuit and calibration unit, 2) duty controller, and 3) reconfigurable gm-boosting LNA. The CR-RSSI utilizes stacked amplifier-rectifier-cell (AR-cell) to reuse the supply current of each blocks. As a result, the power consumption becomes 540 [Formula: see text] with +/-2 dB accuracy and 75 dB dynamic range. The replica bias circuit and calibration unit are adopted to increase the reliability of CR-RSSI. In addition, the duty controller turns off the RSSI when it is not required, and this function leads 70% power reduction. At last, the gm-boosting reconfigurable LNA can adaptively vary its noise and linearity performance with respect to input signal strength. Fro current reusing technique m this feature, we achieve 62% power reduction in the LNA. Thanks to these schemes, compared to the previous works, we can save 70% of power in RSSI and LNA.
authors.forename: Jaeeun
authors.initials: J
authors.lastname: Jang
authors.forename: Yongsu
authors.initials: Y
authors.lastname: Lee
authors.forename: Hyunwoo
authors.initials: H
authors.lastname: Cho
authors.forename: Hoi-Jun
authors.initials: HJ
authors.lastname: Yoo
mesh_terms: D003195:Computer Communication Networks; D004867:Equipment Design; D018594:Human Body; D006801:Humans; D012666:Semiconductors; D059015:Wireless Technology