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      A battery-free multichannel digital neural/EMG telemetry system for flying insects.

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          Abstract

          This paper presents a digital neural/EMG telemetry system small enough and lightweight enough to permit recording from insects in flight. It has a measured flight package mass of only 38 mg. This system includes a single-chip telemetry integrated circuit (IC) employing RF power harvesting for battery-free operation, with communication via modulated backscatter in the UHF (902-928 MHz) band. An on-chip 11-bit ADC digitizes 10 neural channels with a sampling rate of 26.1 kSps and 4 EMG channels at 1.63 kSps, and telemeters this data wirelessly to a base station. The companion base station transceiver includes an RF transmitter of +36 dBm (4 W) output power to wirelessly power the telemetry IC, and a digital receiver with a sensitivity of -70 dBm for 10⁻⁵ BER at 5.0 Mbps to receive the data stream from the telemetry IC. The telemetry chip was fabricated in a commercial 0.35 μ m 4M1P (4 metal, 1 poly) CMOS process. The die measures 2.36 × 1.88 mm, is 250 μm thick, and is wire bonded into a flex circuit assembly measuring 4.6 × 6.8 mm.

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          Author and article information

          Journal
          IEEE Trans Biomed Circuits Syst
          IEEE transactions on biomedical circuits and systems
          Institute of Electrical and Electronics Engineers (IEEE)
          1940-9990
          1932-4545
          Oct 2012
          : 6
          : 5
          Affiliations
          [1 ] Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA. stewart.t@gmail.com
          Article
          10.1109/TBCAS.2012.2222881
          23853229

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