The analog input circuitry contains the analog multiplexer, the instrumentation amplifier, and the sample-and-hold circuitry. 模拟输入电路包含模拟多路复用器,仪表放大器,以及采样保持电路。
You must carefully choose insulation and apply guarding potentials, and you must use an amplifier with picoampere input-bias currents. 提取传感器信号的一个方法是使用仪表放大器,它只放大传感器所产生的电位。