| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation measuring circuit which can perform correction on counting the loss of a pulse system detector and linear processing on a prescribed current range.SOLUTION: A radiation measuring circuit includes a logarithmic transformation circuit 3 which performs logarithmic transformation of a current signal Iin after a pulse signal from a pulse system detector 1 is converted into a current value in accordance with the pulse number to output it as a logarithmic voltage signal Vlog, and a monitor circuit 4 which obtains a linear voltage signal Vlin based on the current signal Iin before logarithmic transformation in the logarithmic transformation circuit 3. The monitor circuit 4 consists of a current mirror circuit 5 which outputs a current with the same value as the current signal Iin without affecting a logarithmic transformation operation of the logarithmic transformation circuit 3 at all and a linear output circuit 6 which outputs a linear voltage signal Vlin corresponding to the output current Iin of the current mirror circuit 5. |
