An Analog-Digital Merged Neural Circuit Using Pulse Width Modulation Technique

被引：0
作者：
Takashi Morie
Jun Funakoshi
Makoto Nagata
Atsushi Iwata
机构：
[1] Hiroshima University,Faculty of Engineering
[2] Fujitsu Limited,undefined
来源：
Analog Integrated Circuits and Signal Processing | 2000年 / 25卷
关键词：
LSI implementation; neural networks; pulse-width modulation; PWM;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper presents a neural circuit using PWM technique based on an analog-digital merged circuit architecture. Some new PWM circuit techniques are proposed. A bipolar-weighted summation circuit is described which attains 8-bit precision in SPICE simulation at 5 V supply voltage by compensating parasitic capacitance effects. A high performance differential-type latch comparator which can discriminate 1 mV difference at 100 MHz in SPICE simulation is also described. Next, we present a prototype chip fabricated using a 0.6 μm CMOS process. The measurement results demonstrate that the overall precision in the weighted summation and the sigmoidal transformation is 5 bits. A neural network has been constructed using the prototype chips, and the experimental results for realizing the XOR function have successfully verified the basic neural operation.
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页码：319 / 328
页数：9
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