When the P89LPC90x is in programming mode all pins that are not used for programming are tri-stated.
When the P89LPC90x is in programming mode all pins that are not used for programming are tri-stated....
When the P89LPC90x is in programming mode all pins that are not used for programming are tri-stated....
This book has been written to support a practically oriented course in programming language transla...
本系统采用电动机电枢供电回路串接采样电阻的方式来实现对小型直流有刷电动机的转速测量。该系统主要由二阶低通滤波电路,小信号放大电路、单片机测量显示电路、开关稳压电源电路等组成。同时自制电机测速装置,用高...
微弱信号检测的目的是从噪声中提取有用信号,或用一些新技术和新方法来提高检测系统输出信号的信噪比。本文简要分析了常用的微弱信号检测理论,对小波变换的微弱信号检测原理进行了进一步的分析。然后提出了微弱信号...