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修改时间 10-28-2008 08:58 AM
修改时间 10-28-2008 09:35 AM
用LF355进行信号调理放大,原理很简单的,应用电路IC资料的应该有,放大后1uA输出的电压为1V,然后任选一种USB数据采集卡采集电压就可以了,如USB-6009
ronke@163.com
修改时间 10-28-2008 09:45 AM
当然,还有一种简单的方法,在光电二极管两端用1K电阻作为负载测量两端的电压,一般信号强的话可输出几百mV.
如BPW21等光电管,测量灯的光信号时,这种方法是在光源与光电管距离很近才能够输出足够强的信号.
做过不少这样的项目,有用IC放大的,有用1K电阻作为负载测量两端的电压,
修改时间 10-28-2008 11:24 PM
谢谢你的解答,我还有疑问---我信号频率很高,采样频率不是要大于我信号频率的两倍以上吗?看你说的意思好像不用考虑频率因素,是这个意思吗?
修改时间 09-14-2015 04:07 AM
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