摘要
本文提出一种新型电压频率转换电路用于提高基于LM33压频电路的频率输出精度。在实际应用中,由于环境变化和元件参数的差异,频率输出的精度很难满足设计要求。所提出的方法通过输出反馈控制实现了精确的频率输出。并且作为某新型瓦斯监控系统的一部分,实现了200Hz～1000Hz,1‰精度的频率输出。
This paper presents a new voltage frequency convert circuit based on LM331 with an improved accuracy. In practical applicability the precision of frequency cannot satisfy the design request. The precise frequency output is achieved by feedback control. As a part of the gas supervisory system, it realizes the 200Hz-1000Hz, 1‰ precision frequency output.
出处
《自动化技术与应用》
2009年第6期63-64,67,共3页
Techniques of Automation and Applications
关键词
煤矿
频率输出
LM331
colliery
voltage frequency convert
LM331
