首页>
外国专利>
Bitline boost for fast settling with current source of adjustable bias
Bitline boost for fast settling with current source of adjustable bias
展开▼
机译:位线升压,可通过可调偏置电流源快速建立
展开▼
页面导航
摘要
著录项
相似文献
摘要
A photodiode is adapted to accumulate image charges in response to incident light. The accumulate image charges are transferred to a floating diffusion, amplified, row selected and the amplified row selected signal is output to a bitline. A bitline enable transistor is coupled to link between the bitline and a bitline source node. A current source is coupled to connect between the bitline source node and a ground. The current source generator sinks adjustable current from the bitline source node to the ground through a cascode transistor and a bias transistor. A cascode hold capacitor is coupled between the cascode control voltage and the ground. A bias hold capacitor is coupled between the bias control voltage and the ground. A bias boost driver is coupled to control the cascode control voltage and the bias control voltage.
展开▼