公开(公告)号：EP3440833B1

公开(公告)日：2019-08-21

申请号：EP17715701.3

申请日：2017-04-04

申请人： Chronocam ,  Consejo Superior De Investigaciones Científicas

发明人： FINATEU, Thomas ,  LINARES BARRANCO, Bernabe ,  SERRANO GOTARREDONA, Teresa ,  POSCH, Christoph

IPC分类号： H04N5/3745

公开(公告)号：EP3440833A1

公开(公告)日：2019-02-13

申请号：EP17715701.3

申请日：2017-04-04

申请人： Chronocam ,  Consejo Superior De Investigaciones Científicas

发明人： FINATEU, Thomas ,  LINARES BARRANCO, Bernabe ,  SERRANO GOTARREDONA, Teresa ,  POSCH, Christoph

IPC分类号： H04N5/3745

CPC分类号： H04N5/3559 ,  H04N5/3575 ,  H04N5/3745 ,  H04N5/37455 ,  H04N5/378

摘要： This invention relates to a pixel circuit comprising a photo-sensor stage (10) comprising a photodiode (1) delivering a photoreceptor current (Iph), a comparison stage (30) configured for detecting a change in a signal voltage (Vph) derived from said photoreceptor current, a sample-and-hold circuit (50) connected to the converting stage (20) and to the comparison stage (30), said comparison stage (30) configured to output an input signal for the sample-and-hold circuit (50), and for emitting a sampling signal to a control terminal of the sample-and-hold circuit (50) when a change is detected in the signal voltage (Vph).

公开(公告)号：EP3313064A1

公开(公告)日：2018-04-25

申请号：EP16306380.3

申请日：2016-10-20

申请人： Chronocam ,  Consejo Superior De Investigaciones Científicas

发明人： FINATEU, Thomas ,  LINARES BARRANCO, Bernabé ,  SERRANO GOTARREDONA, Teresa ,  POSCH, Christoph

IPC分类号： H04N5/3745 ,  H04N5/335

CPC分类号： H04N5/3745 ,  H04N5/335

摘要： A pixel circuit for detecting time-dependent visual data comprises a photo sensing device detecting a light intensity and generating a signal representing the detected light intensity.
The pixel circuit further comprises:
- a voltage amplifier (3) configured for amplifying the signal representing the detected light intensity (V ph ) and generating an amplified signal (V o ), the amplified signal being generated by taking into account a control signal (V qDC ) which shifts an input voltage offset of said voltage amplifier,
- a hysteresis comparing module (4) configured for comparing the amplified signal to at least one threshold value (θo+, θo- ) and to a reference value (V ref ) and for generating at least one output signal (V o +, V o -;Vo 1+ , V o1- ) based on said comparison, and
- a feedback control module configured for generating said control signal of said voltage amplifier based on said at least one output signal generated by said hysteresis comparing module.

摘要翻译： 一种用于检测时间相关的视觉数据的像素电路包括光电传感装置，用于检测光强度并产生表示检测到的光强度的信号。 所述像素电路进一步包括： - 电压放大器（3），其被配置用于放大表示检测到的光强度（Vph）的信号并且生成放大信号（Vo），所述放大信号通过考虑控制信号（VqDC） ，其偏移所述电压放大器的输入电压偏移;滞后比较模块（4），其被配置为将放大的信号与至少一个阈值（θo+，θo-）和参考值（Vref）进行比较，并且用于至少生成 基于所述比较产生一个输出信号（Vo +，Vo-; Vo1 +，Vo1-），以及 - 反馈控制模块，配置用于基于由所述滞后比较模块产生的所述至少一个输出信号产生所述电压放大器的所述控制信号。