多路小信号处理与QDC门信号产生逻辑插件的研究

介绍了一种最近研制成功的多路小幅度信号处理快电子学逻辑插件，它可接收≥40mV的小幅度输入信号而产生32路标准ECL互补输出逻辑信号。该插件的输出信号主要用作QDC的门控信号。该插件还具有多路触发鉴别功能。该插件的研制成功为重离子核物理实验高速、高密度、高稳定性多参数数据获取提供了良好的基础。

Multi-channel logical circuit module used for high-speed, low amplitude signals processing and QDC gate signals generation

In this paper a new kind of logical circuit will be introduced in brief. There are 16 independent channels in the module. The module receives low amplitude signals(≥40mV), and processes them to amplify, shape, delay, sum and etc. After the processing each channel produces 2 pairs of ECL logical signal to feed the gate of QDC as the gate signal of QDC. The module consists of high-speed preamplifier unit, high-speed discriminate unit, delaying and shaping unit, summing unit and trigger display unit. The module is developed for 64CH.12BIT Multi-event QDC. The impedance of QDC is 110Ω. Each gate signal of QDC requires a pair of differential ECL level, Min. Gate width 30ns and Max. Gate width 1μs. It has showed that the outputs of logical circuit module satisfy the QDC requirements in experiment. The module can be used on data acquisition system to acquire thousands of data at high-speed ,high-density and multi-parameter, in heavy particle nuclear physics experiment. It also can be used to discriminate multi-coincidence events.