【摘要】 文中就化学分析数据采集特点出发,提出一种使用隔离放大方案的前置放大电路,并就程控放大倍数切换、隔离放大滤波及差分转单端单极信号等方面给出详细的方案。这一隔离放大电路或调整形式也可用于具有类似特点的其他采集系统中。更多还原

【Abstract】 In the paper a design of isolation preamplifier for characteristics of chemical analyZing and sampling system is brought out. The designs of prograrmmable gain control, isolation amplifier post-filter and difference to unipolar transforma- tion are discussed in detail. The isolation amplifier or its modified circuit can be applied to sampling systems with similar char- acteristics.更多还原