即时通讯使用spartan 3e套件，并使用前置放大器和adc进行模拟捕捉，但当我看到芯片上的输出时会产生很多噪音......前置放大器的输入只有大约60mvp-p ...
我增加它超过这个镜像对信号的较高值有一种影响（我已经处理了两个恭维问题）
..前置放大器（ltc 6912-1）配置为-1增益..并且我只使用一个adc通道......我也想知道前置放大器的有效输入范围...作为
ref已经是1.65v
......有人为此工作过吗？
以上来自于谷歌翻译
以下为原文
im using spartan 3e kit , and using the preamplifier and adc for analog capture, but when i see the output on chip scope there is a lot of noise... the input at the pre amp is only about 60mvp-p ... if i increase it beyond this there is a mirror image kind of effect on higher values of the signal ( i have taken care of two's compliment issue)
.. the pre-amp (ltc 6912-1)is configured for -1 gain .. and im using only one adc channel... also i would like to know the valid input range to the pre-amplifier...as the ref is already 1.65v
... has anybody worked on this ?
即时通讯使用spartan 3e套件，并使用前置放大器和adc进行模拟捕捉，但当我看到芯片上的输出时会产生很多噪音......前置放大器的输入只有大约60mvp-p ...
我增加它超过这个镜像对信号的较高值有一种影响（我已经处理了两个恭维问题）
..前置放大器（ltc 6912-1）配置为-1增益..并且我只使用一个adc通道......我也想知道前置放大器的有效输入范围...作为
ref已经是1.65v
......有人为此工作过吗？
以上来自于谷歌翻译
以下为原文
im using spartan 3e kit , and using the preamplifier and adc for analog capture, but when i see the output on chip scope there is a lot of noise... the input at the pre amp is only about 60mvp-p ... if i increase it beyond this there is a mirror image kind of effect on higher values of the signal ( i have taken care of two's compliment issue)
.. the pre-amp (ltc 6912-1)is configured for -1 gain .. and im using only one adc channel... also i would like to know the valid input range to the pre-amplifier...as the ref is already 1.65v
... has anybody worked on this ?
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