CIRCUIT FOR READING SIGNALS FROM CELLS OF PHOTO DETECTOR MATRIX Russian patent published in 2009 - IPC H04N3/14 

FIELD: physics, processing of images.

SUBSTANCE: invention is related to computer vision equipment and may find application in optical high-speed mice, video cameras and photo cameras. Specified result is achieved by the fact that in available device of circuit for signals reading from active cells of photo detectors, it is suggested to arrange the first electrode of active transistor as source, and the second one - as drain, and to connect feedback capacitor between its drain and gate. Elements that serve signal line and bus of constant recovery potential are the first and second generators of inward and outward current connected accordingly to signal line and constant potential bus, and feedback transistor of the same conductivity type as in active transistor, source of which is connected to constant potential bus, drain - to common lead, gate - to signal line that is amplifier outlet. Additionally it is suggested to connect transistor of the same type of conductivity in cascade manner between drain of cell active transistor and addressing key. And it is also suggested to connect serially one or more transistors of the same type of conductivity in diode connection between feedback transistor source and constant potential bus. The first additional criterion improves accuracy of potential setup on integrating capacitor, the second one expands swing of outlet signal.

EFFECT: increased sensitivity and reduced number of components in column circuit of reading.

3 cl, 2 dwg