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Nmos comparator for image sensor pixel

A comparator, optical sensor technology, applied in image communication, components of color TV, components of TV systems, etc., can solve the problems of limited battery capacity and processing capacity.

Pending Publication Date: 2021-12-17
ソニーアドバンストビジュアルセンシングエージー
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Optical sensors of the DVS type are therefore well-suited, especially for solar- or battery-powered compressive sensing or mobile machine vision applications, where the position of the system must be estimated and where processing power is limited due to limited battery capacity

Method used

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  • Nmos comparator for image sensor pixel
  • Nmos comparator for image sensor pixel
  • Nmos comparator for image sensor pixel

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Embodiment Construction

[0038]The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey to those skilled in the art convey the scope of the invention.

[0039] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In addition, the singular forms and the terms "a", "an" and "the" include the plural forms unless expressly stated otherwise. It should be further understood that the terms: includes, comprises, including and / or comprising, when used in this specification, specify features, integers, steps, operations, elements and / or The presence of a component does not preclude the pre...

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Abstract

An NMOS-only operational transconductance amplifier (OTA) replaces the PMOS transistors with switched capacitor pseudo-resistors in the pixels of an optical sensor such as a dynamic vision sensor or event- based vision sensor. Thus, if a stacked CMOS image sensor (CIS) process is employed, then the upper wafer can be kept free from N- wells, while still having the complete OTA on the upper wafer. Thus, it is possible to have only one wafer-to-wafer connection per pixel. Moreover, by operating the switched capacitor pseudo-resistors as three terminal devices, the gain can further be increased.

Description

[0001] related application [0002] This application claims the benefit under 35 USC 119(e) of US Provisional Application No. 62 / 846,282, filed May 10, 2019, which is hereby incorporated by reference in its entirety. Background technique [0003] Today, machine vision is largely based on conventional cameras and their associated frame-based spatially resolved optical sensors. For certain machine vision tasks, such as object recognition, these traditional frame-based cameras and their image-based optical sensors are well suited. However, for other tasks, such as surveillance, tracking, or position and motion estimation, conventional image sensors have shortcomings. [0004] The main disadvantage is that traditional cameras generate a lot of redundant and unnecessary data, which must be captured, communicated and processed. This high data load slows reaction time by reducing temporal resolution, leads to increased power consumption, and increases the size and cost of the machi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/3745H04N5/369H01L27/146
CPCH04N25/79H04N25/47H04N25/707H04N25/7795H04N25/771H04N25/745H04N25/75
Inventor 拉斐尔·伯纳克里斯蒂安·布伦德利
Owner ソニーアドバンストビジュアルセンシングエージー