A Passive Wideband Noise-Canceling Mixer-First Architecture With Shared Antenna Interface for Interferer-Tolerant Wake-Up Receivers and Low-Noise Primary Receivers

Wake-up receivers (WuRXs) present an opportunity to reduce the average power consumption of Internet-of-Things (IoT) transceivers; however, achieving sensitivity and interferer tolerance, providing wideband matching, and sharing an antenna interface present a significant challenge for existing archi...

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Veröffentlicht in:IEEE journal of solid-state circuits 2022-09, Vol.57 (9), p.2611-2625
Hauptverfasser: Bialek, Hayden, Binaie, Ali, Ahasan, Sohail, Sadagopan, Kamala Raghavan, Johnston, Matthew L., Krishnaswamy, Harish, Natarajan, Arun
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Sprache:eng
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Zusammenfassung:Wake-up receivers (WuRXs) present an opportunity to reduce the average power consumption of Internet-of-Things (IoT) transceivers; however, achieving sensitivity and interferer tolerance, providing wideband matching, and sharing an antenna interface present a significant challenge for existing architectures. This article presents a primary/WuRX which utilizes a quadrature hybrid coupler-based N -path mixer first architecture to simultaneously achieve low noise, wideband matching, and a shared antenna interface. The passive-mixer first approach and a two-code modulated multi-tone signaling scheme provide interferer tolerance in the WuRX. This article analyzes gain/power tradeoffs in the proposed architecture in the context of noise impact with multi-tone WuRX signaling. The proposed architecture is implemented in 65-nm CMOS and occupies 2.25 \text {mm}^{2} . The primary RX achieves 3.8-dB NF and 0.75-dBm out-of-band P1dB with 440- \mu \text{W} power consumption. The WuRX achieves −86-dBm sensitivity for 10-kb/s data rate and up to −40-dB signal-to-interferer ratio (SIR) with 171- \mu \text{W} power consumption.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2022.3148088