-
公开(公告)号：US10721423B2
公开(公告)日：2020-07-21
申请号：US16343720
申请日：2017-10-19
IPC分类号： H04N5/374 , H04N5/335 , H04N5/3745
摘要： A pixel circuit for detecting time-dependent visual data includes a photo sensing device detecting a light intensity and generating a signal representing the detected light intensity. The pixel circuit further includes: a voltage amplifier configured for amplifying the signal representing the detected light intensity and generating an amplified signal, the amplified signal being generated by taking into account a control signal which shifts an input voltage offset of the voltage amplifier; a hysteresis comparing module configured for comparing the amplified signal to at least one threshold value and to a reference value and for generating at least one output signal based on the comparison; and a feedback control module configured for generating the control signal of the voltage amplifier based on the at least one output signal generated by the hysteresis comparing module.
-
公开(公告)号：US10469776B2
公开(公告)日：2019-11-05
申请号：US16090979
申请日：2017-04-04
IPC分类号： H04N5/355 , H04N5/3745 , H04N5/357 , H04N5/378
摘要： This invention relates to a pixel circuit comprising a photo-sensor stage comprising a photodiode delivering a photoreceptor current, a comparison stage configured for detecting a change in a signal voltage derived from said photoreceptor current, a sample-and-hold circuit connected to the converting stage and to the comparison stage, said comparison stage configured to output an input signal for the sample-and-hold circuit, and for emitting a sampling signal to a control terminal of the sample-and-hold circuit when a change is detected in the signal voltage.
-
公开(公告)号：US10904465B2
公开(公告)日：2021-01-26
申请号：US16666387
申请日：2019-10-28
IPC分类号： H04N5/355 , H04N5/3745 , H04N5/357 , 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).
-
-
搜索结果
3 条记录 (耗时 0.015 秒)
