The paper introduces a adjust voltage integration regulator LM317 in common use, this kind of utilitycircuit emphasize the sides of high voltage output circuit.
本文介绍目前常用的电压可调集成稳压器LM 317实用电路，着重在高压输出电路方面。
2
In the paper, the calculating method of signal extraction filter pass-band according to the paper-counting speed and the utilitycircuit of separating strong interference in pass-band are given.
并针对点钞速度给出了信号提取滤波器通频带的计算方法，以及在带内分离强干扰的实用电路。
3
The circuit has a characteristic of high accuracy of voltage transfer and current transfer, simple structure, easy realization, low cost, and good utility.