Bulk Switching Instrumentation Amplifier for a High-Impedance Source in Neural Signal Recording

2015 ◽  
Vol 62 (2) ◽  
pp. 194-198 ◽  
Author(s):  
Myungjin Han ◽  
Boram Kim ◽  
Yi-An Chen ◽  
Hyojung Lee ◽  
Seung-Han Park ◽  
...  
Keyword(s):  
Instrumentation Amplifier ◽  
Neural Signal ◽  
High Impedance ◽  
Signal Recording ◽  
Neural Signal Recording

CMOS Amplifier for Neural Signal Recording Applications

2015 ◽  
Vol 645-646 ◽  
pp. 1279-1284
Author(s):  
Zhang Zhang ◽  
Zheng Xi Cheng ◽  
Yi Wei Zhuang
Keyword(s):  
Low Noise ◽  
Cmos Process ◽  
Differential Mode ◽  
Neural Signal ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Voltage Range ◽  
Cmos Amplifier ◽  
Signal Recording ◽  
Neural Signal Recording

A low power low noise CMOS amplifier with integrated filter for neural signal recording is designed and fabricated with CSMC 0.5 μm CMOS process. DC offsets introduced by electrode-tissue interface are rejected through a feedback low-pass filter. The bandwidth of the amplifier is in 3.5Hz-5.5KHz range, and the gain is about 48dB in the midband. AC input differential mode voltage range is 10mV, and DC input differential mode voltage range is 180mV. The amplifier can accommodate 180mV DC offsets drift and 10mV neural spikes. The neural probe array is integrated directly on the surface of the amplifier array chip, and is tested in saline solution, and also is implanted in rats in vivo , the results of the experiments show that the amplifier is suitable for neural signal recording. The power dissipation is about 14μW while consuming 0.16 mm2 of chip area, which satisfies implantable devices requirements.

Soft implantable microelectrodes for future medicine: prosthetics, neural signal recording and neuromodulation

Lab on a Chip ◽  
2016 ◽  
Vol 16 (6) ◽  
pp. 959-976 ◽  
Author(s):  
Joong Hoon Lee ◽  
Hanseop Kim ◽  
Jeong Hun Kim ◽  
Sang-Hoon Lee
Keyword(s):  
Implantable Devices ◽  
Neural Signal ◽  
Signal Recording ◽  
Neural Signal Recording

Soft based implantable devices have provided various potential diagnostic options and therapeutic methods in diverse medical fields.

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