| 摘要 |
PURPOSE:To enable long-term continuous measurement by forming a counter circuit into the two-stage constitution of the 1st counter circuit which operates at a high speed and the 2nd counter circuit consisting of plural sets of counter circuits to which the contents of the 1st counter circuit are transferred. CONSTITUTION:The 1st counter circuit 5 which can operate at a high speed counts the generation rates of input data. When the count content of the circuit 5 attain 2<n>, said content is accumulated in one of plural pieces of cumulation circuits 69 selected by an input distribution part 20. The other circuits 69 except the circuit 69 under cumulation output the frequency distributions 57 selected successively according to the sequence predetermined by an output change-over part 26. The circuits 69 are constituted of RAMs and counters. |
