发明名称 |
Pixel analog-to-digital converter using a ramped transfer gate clock |
摘要 |
An image sensor includes a photosensitive region that accumulates charge corresponding to received incident light; a transfer gate for transferring charge from the photosensitive region; a voltage supply having an increasing voltage over time; a floating diffusion for receiving the charge from the photosensitive region and converting the charge to a voltage; an amplifier for receiving and amplifying a signal from the floating diffusion; a comparator for comparing a voltage from the amplifier to a reference voltage; and a counter for counting clock cycles between initiation of the increasing voltage until a signal is received from the comparator indicating charge transfer from the photosensitive region to the floating diffusion; wherein a digital signal is generated that represents an unfilled capacity of the photosensitive region.
|
申请公布号 |
US2007188640(A1) |
申请公布日期 |
2007.08.16 |
申请号 |
US20060354444 |
申请日期 |
2006.02.15 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
XU WEIZE |
分类号 |
H04N3/14;H04N5/357;H04N5/374;H04N5/378 |
主分类号 |
H04N3/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|