【摘要】 120路簇射计数读出电子学系统,主要由采样保持电路、多路模拟数字转换器及模拟总线组成。为了提高整个系统的装配密度和可靠性并减小环境温度变化的影响,专门设计了一种薄膜混合集成采样保持电路。采用了计算机在线校正方法,解决了放大器增益变化、积分非线性、模拟开关台阶和传输电缆干扰等引起的测量误差问题。系统的主要指标为:线性优于0.2％,σ噪音约为1.3BADC道,串扰优于1％,Z向位置分辨优于0.6％(SQS簇射计数器模型)。更多还原

【Abstract】 This system mainly consists of sample-hold circuit, multiplexer A/D converter and analog bus. A method of computer online correction is used as well. The problem of measuring error caused fay gain variation, integrated nonlinearity, pedestal of analog switch, influence of transmission cable and so on is solved, so good iinearity and stability have been obtained. The main specifications are as follows; nonlinearity<0.2%, a noise is about 1.3 BADC bit, cross influence<1%, resolution in Z direction<0.6% (SQS shower counter model) .更多还原