Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume 69, Issue 7, Pages 2794-2804Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2022.3163801
Keywords
Sensitivity; Voltage; Baseband; Signal processing; Receivers; Radio frequency; Power demand; Differential; ultra-low-power wake-up receiver; envelope detector; time-domain; offset cancellation technology
Categories
Funding
- National Natural Science Foundation of China [62131010]
- Natural Science Basic Research Program of Shaanxi [2022JC-39]
- Chongqing Talents Program [CQYC20210301367]
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This paper presents a fully differential wake-up receiver (WuRX) with ultra-low power and high sensitivity. The proposed receiver achieves differential signal processing without an off-chip balun, resulting in noise suppression and sensitivity improvement. Low voltage baseband signal processing and periodic offset cancellation technique are used to reduce power consumption and mitigate offset and low-frequency noise impacts.
This paper presents a fully differential wake-up receiver (WuRX) with ultra-low power and high sensitivity. Implementing the fully differential framework achieves differential signal processing without an off-chip balun, which achieves noise suppression and sensitivity improvement. The low voltage baseband signal processing (LVBSP) is proposed to cut down the power consumption, which is achieved by the low-voltage fast-response differential amplifier (LFDA) and the time-domain signal processing circuit. Moreover, the periodic offset cancellation technique (POCT) in the baseband circuit is proposed to alleviate the offset and low-frequency noise impacts. This WuRX is implemented in the TSMC 65-nm CMOS process occupying an active area of 0.18 mm(2). When operating at 434 MHz, the proposed WuRX has a -75-dBm sensitivity at 250 bps while consuming 6.4 nW from 0.4 V supply voltage.
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