高技术通讯2012，Vol.22Issue(7)：752-757,6.DOI:10.3772/j.issn.1002-0470.2012.07.013
用于植入式神经信号再生系统的轨到轨运算放大器的设计
Design of a rail-to-rail operational amplifier for implantable neural signal regeneration systems
摘要
Abstract
According to the low-voltage low-power requirement of the body implatation application of an implantable neural signal regeneration system for treatment of central nerve damages, a constant gm rail-to-rail operational amplifier (op amp) was designed to meet the the need of the intermediate and stimulation stage of the micrcoelectronic neural signal regeneration system. A current switch transconductance control circuit working in the weak inversion region was used as the input stage while a improved feedforward class AB amplifer was used as the output stage. The chip was implemented in the SMIC 0.18 μm 1P6M CMOS process. The simulation and test results show that the circuit can realize the rail-to-rail dynamic range and the constant transconductance. It is suitable for body implantation because the power consumption and the chip area are very small. It can be used for the amplification of weak neural signal in the neural signal regeneration system.关键词
运算放大器/满摆幅/恒跨导/低功耗Key words
operational amplifier/full dynamic range/constant transconductance/low power引用本文复制引用
张翼,孟桥,王志功,唐凯..用于植入式神经信号再生系统的轨到轨运算放大器的设计[J].高技术通讯,2012,22(7):752-757,6.基金项目
国家自然科学基金90307013,90707005)和江苏省自然科学基金(BK2008032)资助项目. （BK2008032）
