PSOC 5功率监视器问题

你好，
我有一个PSoC 5的设计，用于监控电路板电源电压水平。
我们有大约10个电源，其中9个正在读取确切的电压，但我有一个问题是3.3V的阅读，这是连接到PSoClinux使用分压电阻网络（50K+50K）。
当我测量一个吸尘器上的电压时，我读到1.65 V，这是可以的，因为1.65×2＝3.3V。但是SoC报告了更高的电压，大约3.45伏。
我已经把一个示波器连接到模拟输入上，看到标称为1.65 V以上，在大约500赫兹的频率下，只有在电压分配器之后出现的一个小的重复斜坡，并且不在电源输出端。这个斜坡解释了PSoC在平均后报告更高电压的原因。
为了确保干扰与SOC相关，IE编译了一个版本，将这个感测信号与功率监视器断开，实际上干扰消失了。
我的理论是，我看到的斜坡是因为内部的A/D在我的其他输入之间，而副电容是“记住”旧电压，然后采样一个更高的电压（因为我的感应线通过50K电阻连接，电流不足以使过渡。透明的）。
我试图找到一个修复，而不改变电压DEVIDER到较低的电阻值，我想使采样率慢得多，所以电压可以稳定之前，samplingis作出，但我不能找到这个配置GUI上的选择。
有什么想法吗？
谢谢！



     以下为原文
  Hi ,
    I have a design with the PSOC 5 , that is used to monitor the board power supply voltage levels.
    we have about 10 power supplies ,  9 of them are reading the exact voltage but i have an issue with the 3.3V reading that is connected to the PSOC using a voltage divider resistor network ( 50K + 50K ) .
    when i measure the voltage on the PSOC using a fluke i read ~1.65V which is OK since 1.65*2=3.3V . but the SOC reports a higher voltage , around 3.45V.
    I have connected an osciloscope to the analog input and saw that above the nominal 1.65V , at a frequency of about 500hz there is a small repetitive ramp in the voltage that appear only after the voltage divider and is not seen  at the power supply output. this ramp explains why the psoc reports a higher voltage after averaging
    to make sure that the interference is related to the SOC , ive compiled a version disconnecting this sense signal from the power monitor and indeed the interference disappeared.
    My theory is that the ramp i saw is caused because the internal A/D is muxed between my other inputs and the parazitic capacitance "Remembers" the old voltage and then samples a higher voltage ( since my sense line is connected through 50K resistor , the current is not sufficient to make the transition transparent ) .
    I am trying to find a fix without changing the voltage devider to lower resistive values , i was thinking to make the sample rate much slower so the voltage can be stable before the sampling is made but i cant find this option on the configuration GUI .
    Any Ideas?
     
    Thanks!