Dataset Information

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

ABSTRACT: Wake-up receivers (WuRX) present an opportunity to reduce average power consumption of IoT transceivers, however achieving sensitivity and interferer tolerance while providing wideband matching and sharing an antenna interface present a significant challenge for existing architectures. This paper 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. The paper analyzes gain/power trade-offs 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 mm ². The primary RX achieves 3.8 dB NF and 0.75 dBm out-of-band P1dB with 440μW power consumption. The WuRX achieves -86 dBm sensitivity for 10kb/s data rate and up to -40 dB signal-to-interferer ratio (SIR) with 171μW power consumption.

SUBMITTER: Bialek H

PROVIDER: S-EPMC10022418 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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

Bialek Hayden H Binaie Ali A Ahasan Sohail S Sadagopan Kamala Raghavan KR Johnston Matthew L ML Krishnaswamy Harish H Natarajan Arun A

IEEE journal of solid-state circuits 20220301 9

Wake-up receivers (WuRX) present an opportunity to reduce average power consumption of IoT transceivers, however achieving sensitivity and interferer tolerance while providing wideband matching and sharing an antenna interface present a significant challenge for existing architectures. This paper 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 passiv ...[more]

PMID: 36937788

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Project description:PurposeWide-awake local anesthesia no-tourniquet (WALANT) hand surgery has gained popularity because of its cost savings, safety, favorable outcomes, and high patient satisfaction. However, the wide-awake nature of the technique causes many patients to experience anxiety during the procedure. Nonorthopedic studies have reported the anxiolytic effects of intraprocedural music in a variety of wide-awake medical procedures. This prospective randomized controlled trial investigated the effects of wearing noise-canceling headphones and listening to music on patient anxiety during WALANT hand surgery.MethodsInstitutional review board approval was obtained. Patients were randomized to one of the following groups: (1) a headphones group that wore noise-canceling headphones and listened to music (genre of their choice) during the surgery, or (2) a control group that neither wore noise-canceling headphones nor listened to music during surgery. Patient anxiety was assessed on a 10-point visual analog scale before, during, and after surgery. All patients completed an overall experience questionnaire after surgery.ResultsFifty patients were enrolled, with 25 in each group. Both the groups were similar in terms of patient characteristics, diagnosed anxiety, and preoperative level of anxiety. The headphones group was found to have significantly less intraoperative anxiety (1.02 vs 2.32, respectively; P = .017) and a significantly greater net decrease in anxiety from the preoperative to intraoperative level (-1.78 vs -0.56, respectively; P = .033) than the control group. In the headphones group, 92% (23/25) of patients stated that they would recommend wearing noise-canceling headphones and listening to music to other WALANT hand surgery patients. All (50/50) patients in both groups reported that they would choose to undergo WALANT hand surgery again if needed for the same problem.ConclusionsThe use of noise-canceling headphones with music during WALANT hand surgery significantly decreases intraoperative patient anxiety. This intervention represents an effective, safe, and inexpensive nonpharmacologic measure to improve patient anxiety and overall experience with WALANT hand surgery.Type of study/level of evidenceTherapeutic I.

Dataset Information

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

Publications

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

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