Invention Grant
US08009212B2 Image processing system with a 4-T pixel and method thereof capable of reducing fixed pattern noise
有权
具有4-T像素的图像处理系统及其能够降低固定图案噪声的方法
- Patent Title: Image processing system with a 4-T pixel and method thereof capable of reducing fixed pattern noise
- Patent Title (中): 具有4-T像素的图像处理系统及其能够降低固定图案噪声的方法
-
Application No.: US12237403Application Date: 2008-09-25
-
Publication No.: US08009212B2Publication Date: 2011-08-30
- Inventor: Yuan-Che Lee , Jhy-Jyi Sze , Chiao-Fu Chang
- Applicant: Yuan-Che Lee , Jhy-Jyi Sze , Chiao-Fu Chang
- Applicant Address: TW Science-Based Industrial Park, Hsin-Chu
- Assignee: United Microelectronics Corp.
- Current Assignee: United Microelectronics Corp.
- Current Assignee Address: TW Science-Based Industrial Park, Hsin-Chu
- Agent Winston Hsu; Scott Margo
- Main IPC: H04N3/14
- IPC: H04N3/14 ; H04N5/335
Abstract:
Circuitry for reducing fixed pattern noise in an image processing system with a 4-T (4 transistors) pixel and a method thereof is proposed. The image processing system includes two voltage sources, two current sources, a 4-T pixel, a second portion of a linearized source follower, a ping pong memory, a PGA, and auto-zero circuitry. By coupling the auto-zero circuitry to the PGA, an open loop is formed to clamp the output of an op amp of the PGA to a stable reference when resetting the PGA so as to remove DC offsets at the output terminal of the op amp.
Public/Granted literature
- US20100073525A1 IMAGE PROCESSING SYSTEM WITH A 4-T PIXEL AND METHOD THEREOF CAPABLE OF REDUCING FIXED PATTERN NOISE Public/Granted day:2010-03-25
Information query
