公开(公告)号：US20210258525A1

公开(公告)日：2021-08-19

申请号：US17174499

申请日：2021-02-12

Applicant: PROPHESEE

Inventor： DANIEL MATOLIN ,  THOMAS FINATEU ,  MASSIMILIANO GIULIONI ,  CHRISTOPH POSCH

IPC: H04N5/378 ,  H04N5/341

Abstract: A circuit includes a selection circuit electrically coupled to pixels of a line of an event vision sensor. The selection circuit is configured to receive an activation signal from an active pixel of the line, generate an acknowledge signal in response to receiving the activation signal, and send the acknowledge signal to the pixels of the line. The circuit also includes a control circuit that is electrically coupled to a pixel having a largest distance to the selection circuit among the pixels of the line. The control circuit is configured to receive the acknowledge signal from the selection circuit, and generate a process-reading signal in response to receiving the acknowledge signal. The circuit also includes an interface circuit electrically coupled to the pixels of the line and configured to cause a reset of the selection circuit, the control circuit, and the pixels of the line after receiving the process-reading signal.

公开(公告)号：US20210310861A1

公开(公告)日：2021-10-07

申请号：US17220761

申请日：2021-04-01

Applicant: PROPHESEE

Inventor： DANIEL MATOLIN ,  Denis BOURKE ,  Christian BOUVIER

IPC: G01J1/42 ,  G01J1/46

Abstract: A pixel circuit is provided for use in an image sensor. The pixel circuit includes a photosensitive element configured to generate a current signal in response to brightness of light impinging on the photosensitive element, and a converter configured to receive the current signal from the photosensitive element and generate a voltage signal based on the received current signal. The pixel circuit also includes a capacitor electrically coupled to the converter in series and configured to receive the voltage signal from the converter, and an amplifier electrically coupled, at an input, to the capacitor in series and configured to generate, at an output, an amplified signal based on an output signal from the capacitor, wherein there is no feedback between the output and the input of the amplifier. Further, the pixel circuit includes a reset device configured to reset the amplifier in response to a trigger signal being generated.