公开(公告)号：US20020109098A1

公开(公告)日：2002-08-15

申请号：US09994622

申请日：2001-11-28

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE

Inventor： Philippe Pantigny ,  Arnaud LaFlaquiere ,  Frederic Rothan

IPC: G01T001/24

CPC classification number: H04N5/374 ,  H04N5/357

Abstract: The invention relates to a circuit for reading charges comprising a capacitive means (C1, C2) with capacitance Ca to store charges and means of reading a voltage sampled at the terminals of the capacitive means. The capacitive means is built up from a first capacitive means (C1) and a second capacitive means (C2) with a capacitance Cb less than Ca. The read circuit comprises means of comparing the voltage read at the terminals of the capacitive means with a threshold value (Vthreshold) and means of controlling the transfer of charges stored in the first capacitive means to the second capacitive means when the voltage read at the terminals of the capacitive means exceeds the threshold value (Vthreshold). The invention is applicable to detection of radiation in the imagery field.

Abstract translation: 本发明涉及一种用于读取电荷的电路，包括具有电容Ca的电容装置（C1，C2）以存储电荷，以及读取在电容装置的端子处采样的电压的装置。 电容装置由电容Cb小于Ca.的第一电容装置（C1）和第二电容装置（C2）构成。 读取电路包括将在电容性装置的端子处读取的电压与阈值（Vthreshold）进行比较的装置，以及当在端子处读取电压时，将存储在第一电容装置中的电荷转移到第二电容装置的装置 的电容式装置超过阈值（Vth阈值）。 本发明适用于图像场中的辐射检测。