PC104总线电路中的信号滤波处理  

Signal Filter Processing in PC104 Bus Circuit

作　　者：朱松柏[1] 彭乡琳 朱莹[1] 

机构地区：[1]中国兵器工业第五八研究所军品部,四川绵阳621000

出　　处：《兵工自动化》2006年第6期72-72,74,共2页Ordnance Industry Automation

摘　　要：在PC104总线电路中的信号滤波中,使用硬软件方法过滤杂波信号。硬件处理方法是在RC滤波电路的输出端加施密特触发器,对滤波电路的输出整形,取得前沿很陡的输出信号,并在CPLD中对信号作反相处理。软件处理则设置一小于信号脉冲宽度且大于现场噪声最大脉宽的时间常数,并在时间常数设定的时间段内循环检测,对不能检测到的信号则作杂波信号处理。The hardware and software method was used to filter noise signal in signal filer of PC104 bus. The hardware processing method includes adding Smiter trigger in RC filter circuit to plastic the output wave of filter circuit, acquiring front steep output signal of and making reverse operation in CPLD. The software processing needs detect circularly in a time enacted by a time constant, whose length less than the signal width and more than the widest width of locale noise, and treat the signal that cannot be detected as noise signal.

关 键 词：PC104 总线电路 信号滤波 

分 类 号：TN911.7[电子电信—通信与信息系统]