Signal transfer apparatus, and imaging apparatus and radiation image pick-up system using it

摘要

A signal transfer apparatus of high S/N ratio and high read speed suitable for use in photoelectric conversion circuit units with a large pixel count and an imaging apparatus and radiation image pick-up system. The signal transfer apparatus, comprises a plurality of terminals connected to a plurality of signal sources, and a read circuit unit for converting signals received from the terminals into series signals and outputting the resulting series signals. The read circuit unit comprises first operational amplifiers connected to the terminals, and second operational amplifiers for receiving outputs of the first operational amplifiers. And each of the first operational amplifier comprises an inverting input terminal connected to each of the terminals, an output terminal with an integral capacitor and switch being connected in parallel between it and the inverting input terminal, and a non-inverting input terminal supplied with a reference voltage.