同样的原因，不用的放大器应当成单位增益跟随器(驱动端和感测端接到一起)，且其输入端应接地。
In such cases, the unused amplifier should be connected as a unity-gain follower (force and sense pins tied together) and the input should be connected to ground.
‘所有技术服务的发布测试必须包含被测服务所依赖的所有服务的端到端的测试。’
The release testing of all technical services must be performed as an end-to-end testing including all services the tested service depends on.
如果输入端的交流电压很大，其一部分信号被整流，于是在被测的直流信号中产生了误差。
If the AC voltage at the input is large, part of this signal is rectified, producing an error in the DC signal being measured.
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