模拟输入线路接法能够影响数据采集测量的完整性。地电流、共模电压、输入偏置电流和噪声都能对信号起破坏作用,特别是对那些要求分辨力在12位以上的应用项目影响更为严重。许多数据采集系统提供3种输入线路接法的选择:单端、真差动和伪差动。单端操作为每块板提供最多的通道数目并具有最少数量的连线。例如一个典型的数据采集板的系统具有16个通道输 Analog input wiring can affect the integrity of data acquisition measurements. Ground current, common-mode voltage, input bias currents, and noise can all contribute to damaging the signal, especially for those applications requiring resolution above 12 bits. Many data acquisition systems provide three options for input line connections: single-ended, true differential, and pseudo-differential. Single-ended operation provides the maximum number of channels per board and has the fewest number of connections. For example, a typical data acquisition board system has 16 channel inputs