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仪表运放 RF INTERFERENCE
发表于 2008-5-14 15:09:02
RF rectification is often a problem when amplifiers are used in
applications having strong RF signals. The disturbance can appear
as a small dc offset voltage. High frequency signals can be
filtered with a low-pass RC network placed at the input of the
instrumentation amplifier, as shown in Figure 47. The filter
limits the input signal bandwidth, according to the following
relationship:
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仪表运放输入偏置电流回路
发表于 2008-5-14 15:05:18

Input Bias Current Return Path
The input bias current of the AD8228 must have a return path
to common. When the source, such as a thermocouple, cannot
provide a return current path, one should be created, as shown
in Figure 46.

 

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