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A prototype of hybrid neural recording interface has been developed for extracellular neural recording.It consists of a silicon-based plane microelectrode array and a CMOS low noise neural amplifier chip.The neural amplifier chip is designed and implemented in 0.18 m N-well CMOS 1P6M technology.The area of the neural preamplifier is only 0.042 mm2with a gain of 48.3 dB.The input equivalent noise is 4.73μ Vrms within pass bands of 4 kHz.To avoid cable tethering for high dense multichannel neural recording interface and make it compact,flip-chip bonding is used to integrate the preamplifier chip and the microelectrode together.The hybrid device measures 3 mm×5.5 mm×330μm,which is convenient for implant or in-vivo neural recording.The hybrid device was testified in in-vivo experiment.Neural signals were recorded from hippocampus region of anesthetized Sprague Dawley rats successfully.
A prototype of hybrid neural recording interface has been developed for extracellular neural recording. It consists of a silicon-based plane microelectrode array and a CMOS low noise neural amplifier chip. The neural amplifier chip is designed and implemented in 0.18 m N-well CMOS 1P6M technology. The area of the neural preamplifier is only 0.042 mm2 with a gain of 48.3 dB. The input equivalent noise is 4.73 μ Vrms within pass bands of 4 kHz. To avoid cable tethering for high dense multichannel neural recording interface and make it compact, flip -chip bonding is used to integrate the preamplifier chip and the microelectrode together. The hybrid device measures 3 mm × 5.5 mm × 330 μm, which is convenient for implant or in-vivo neural recording. The hybrid device was testified in-vivo experiment. Neural signals were recorded from hippocampus region of anesthetized Sprague Dawley rats successfully.