期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 44, 期 3, 页码 995-1005出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2008.2010997
关键词
Multi-channel recording; microelectrodes; extracellular recording; electrode array; implantable; brain; hippocampus; delta compression; neural amplifier
A 3D microsystem for multi-site penetrating extracellular neural recording from the brain is presented. A 16 x 16-channel neural recording interface integrated prototype fabricated in 0.35 mu m CMOS occupies 3.5 mm x 4.5 mm area. Each recording channel dissipates 15 mu W of power with input-referred noise of 7 mu V-rms over 5 kHz bandwidth. A switched-capacitor delta read-out data compression circuit trades recording accuracy for the output data rate. An array of 1.5 mm platinum-coated microelectrodes is bonded directly onto the die. Results of in vitro experimental recordings from intact mouse hippocampus validate the circuit design and the on-chip electrode bonding technology.
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