A bio-physically inspired silicon neuron

被引:107
作者
Farquhar, E [1 ]
Hasler, P [1 ]
机构
[1] Georgia Inst Technol, Atlanta, GA 30332 USA
来源
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2005年 / 52卷 / 03期
关键词
analog circuits; bioelectric potentials; biological cells; nervous system;
D O I
10.1109/TCSI.2004.842871
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The physical principles governing ion flow. in biological neurons share interesting similarities to electron flow through the channels of MOSFET transistors. Here, is described a circuit which exploits the similarities better than previous approaches to build an elegant circuit with electrical properties similar to real biological. neurons. A two-channel model is discussed including sodium (Na+) and potassium (K+). The Na+ channel uses four transistors and two capacitors. The K+ channel uses two transistors and one capacitor. One more capacitor simulates the neuron membrane capacitance yielding a total circuit of four capacitors and six transistors. This circuit operates in real-time, is fabricated on standard CMOS processes, runs in subthreshold, and has a power supply similar to that of real biology. Voltage and current responses of this circuit correspond well with biology in terms of shape, magnitude, and time.
引用
收藏
页码:477 / 488
页数:12
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