| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pulse noise filtering method which enables speed-up of a photon detector without specifically-adjusting features such as APD to be used, and a photon detector circuit using it. <P>SOLUTION: In this method, a timing generator circuit 71 generates timing signal which applies reverse bias pulse voltage to a photodetector 2, a power supply circuit 1 applies reverse bias pulse voltage to the photodetector 2 in accordance with the timing signal, and then a subtractor 63 subtracts output current signal of the photodetector 2 previously-fetched from the latest output current signal of the photodetector 2 to filter out noise. <P>COPYRIGHT: (C)2011,JPO&INPIT |
