发明名称 |
Zero DC current readout circuit for CMOS image sensor using a discharge capacitor |
摘要 |
A method of reading out a light signal from a pixel is disclosed. The method comprises first charging a capacitor to a predetermined voltage during a precharge stage. Next, during a readout stage, discharging the capacitor for a predetermined length of time through a pixel output transistor. The pixel output transistor is modulated by the light signal by applying the light signal to the gate of the pixel output transistor. Finally, the output signal is determined to be the voltage held by the capacitor.
|
申请公布号 |
US6864476(B2) |
申请公布日期 |
2005.03.08 |
申请号 |
US20040769339 |
申请日期 |
2004.01.30 |
申请人 |
OMNIVISION TECHNOLOGIES, INC. |
发明人 |
DAI TIE JUN |
分类号 |
H04N3/15;(IPC1-7):H01L27/00 |
主分类号 |
H04N3/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|