Patent ID: 7023482
Filing Date: 2006-04-04
Classification: H04N

Abstract:
1. A solid state image pickup apparatus comprising a plurality of amplifying type photoelectric conversion elements each comprising photoelectric conversion means and amplifying means for converting a signal charge formed by the photoelectric conversion means into a signal voltage and amplifying the signal voltage, the photoelectric conversion elements being arranged two dimensionally, and being connected commonly by a plurality of signal output lines for outputting signals through the signal output lines, wherein each of the signal output lines has a constant current supply means for supplying a current, and the current supply means comprises a constant current circuit having a transistor; a sample hold means having switching means and capacitor means, wherein the switching means is disposed between one of main electrodes of the transistor and a control electrode of the transistor, the capacitor means is connected to the control electrode, thereby maintaining the current supplied from the constant current circuit; and a reference current source for supplying the voltage corresponding to the reference current to the capacitor of the sample hold means through the switching means.