公开(公告)号：US20170285579A1

公开(公告)日：2017-10-05

申请号：US15508195

申请日：2015-07-22

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Ken KITAZAWA ,  Mitsunori NISHIZAWA ,  Takashi ITO

IPC: G04F10/00 ,  G01N15/14 ,  G01N21/64 ,  H03L7/081

CPC classification number: G04F10/005 ,  G01N15/1431 ,  G01N21/64 ,  G01N21/6408 ,  G04F10/06 ,  H03L7/0818

Abstract: A time measurement device for calculating a time from an input of a first trigger signal to an input of a second trigger signal as a measured time includes a start gate configured to generate a start signal, a stop gate configured to generate a stop signal, a TDC circuit configured to generate a digital code corresponding to the time from an input of a start signal to an input of a stop signal, a delay circuit configured to delay an input of at least one of the start signal and the stop signal to the TDC circuit by a predetermined delay time, and a control unit configured to calculate a measured time on the basis of a plurality of digital codes generated by the TDC circuit, wherein the time delay unit selects at least two delay times.