In the overflow drain mode of a PDS, both TXS and RST are both turned on to drain excess charge that overflows from PDL photodiodes into the PDS photodiode.

• 当PDS处于溢流排出模式，转移电晶体TXS与重置电晶体RST皆会被开启以将光电二极体PDL处溢出之过量电荷洩至光电二极体PDS处。