大家好，
我需要一些建议，因为我不能使差动放大器工作。
我有两个方波在100kHz左右，0到50MV。
方波之一是参考，是“纯”100kHz方波。
另一个是用传感器移动，在0到50MV之间。
我想放大这两个信号之间的差异。
我尝试了两个或三个AMPS的SAMSP，这2个信号被声明为模拟输入，参考是VSS。
iSAMP的输出是一个类似的输出
我能看到的输出只有噪声…它的最大移动量只有2MV。
它应该在0到50MV×16＝800毫伏之间移动。
有些东西我错过了，我真的想知道什么
有一个附加说明MPX压力传感器连接到PSoC，但它似乎不在柏树网站上？
这个附注看起来真的像我想做的措施。
有人能帮我吗？指向我使用iSAMP验证的东西，我可能错过了吗？
多谢。
以上来自于百度翻译
以下为原文
hello everybody,
I need some advice(s) because I am not able to make the differen
tial amplifier to work ...
I have two square waves around 100KHz, 0 to 50mV
one of the square wave is the reference and is a "pure" 100KHz square wave
the other is moving with a sensor, between 0 and 50mV too
I want to amplify the difference between the two signals.
I tried the insamp, with two or three amps, the 2 signals are declared as analoginput, the reference is vss
the output of the insamp is an analogoutbuf
the output I can see is only made of noise... it moves a very little 2mV maximum
it should move between 0 and 50mV * 16 = 800mV
There is something i miss, and I really want to know what
there was an appnote for interfacing a mpx pressure sensor to a psoc, but it doesnt seems to be on the cypress site ?
this appnote seems really to be like the measures I want to make
can someone help me ? point me the things to verify when using the insamp and that I could have missed ?
many thanks.
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