32通道高精度时间数字转换电路设计
Design of 32-channel and High-resolution TDC Circuit
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摘要: 介绍了一种在FPGA中基于Wave Union技术而实现的32通道高精度时间数字转换器（time-to-digital convertor，TDC）电路.利用加法器进位链的进位延迟，输入击中前沿产生wave union送到进位链-寄存器阵列结构中做多次测量，有效地细分了进位链中的超宽码（ultra-wide bins），提高了时间间隔测量精度.经过初步的时序仿真和硬件测试，验证结果表明该T DC电路基本满足设计要求.Abstract: A 32-channel and high-resolution Wave Union time-to-digital converter (TDC) implemented in FPGA is presented.Utilizing time delay in carry chain of adders,leading edge of input hit launches a “wave union” into the carry chain-register array structure,in which multiple measurements are made to effectively subdivide the ultra-wide bins and improve measurement resolution.Timing simulation and hardware testing results show that the TDC circuit basically fulfills the design requirements.
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