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HermesE: A 96-Channel Full Data Rate Direct Neural Interface in 0.13 \mu m CMOS

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7 Author(s)
Hua Gao ; Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA ; Walker, R.M. ; Nuyujukian, P. ; Makinwa, K.A.A.
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A power and area efficient sensor interface consumes 6.4 mW from 1.2 V while occupying 5 mm × 5 mm in 0.13 μm CMOS. The interface offers simultaneous access to 96 channels of broadband neural data acquired from cortical microelectrodes as part of a head-mounted wireless recording system, enabling basic neuroscience as well as neuroprosthetics research. Signals are conditioned with a front-end achieving 2.2 μVrms input-referred noise in a 10 kHz bandwidth before conversion at 31.25 kSa/s by 10-bit SAR ADCs with 60.3 dB SNDR and 42 fJ/conv-step. Switched-capacitor filtering provides a well-controlled frequency response and utilizes windowed integrator sampling to mitigate noise aliasing, enhancing noise/power efficiency.

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Solid-State Circuits, IEEE Journal of  (Volume:47 ,  Issue: 4 )