In a photoelectric converting apparatus including a sensor unit, a transfer unit, and a memory unit, noise can be minimized. The sensor unit includes a plurality of pixels each having at least a photoelectric converter and a first amplifier for amplifying a signal derived from the photoelectric converter, and a memory unit including a plurality of storage elements, for storing the signal derived from the sensor unit, each storage element having a second amplifier for amplifying a signal derived from the storage element to output an amplified signal, wherein the gain of the first amplifier is made different from a gain of the second amplifier.

 
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