Patent ID: 8153946

Claim:
A semiconductor device comprising: a light-receiving element which is connected to a negative power supply and generates conductive carriers by receiving light; an amplifier transistor which is a depletion transistor and amplifies an electrical signal obtained by the conductive carriers; a transfer gate transistor which is a depletion transistor and is controlled by a negative potential applied to a gate to electrically connect or disconnect the light-receiving element and the amplifier transistor; an address transistor having a current path having one end connected to a source of the amplifier transistor and the other end connected to a ground terminal; a reset transistor which has a current path having one end connected to a ground terminal and the other end connected to a gate of the amplifier transistor, and controls a gate potential of the amplifier transistor; and a load transistor having a current path having one end connected to a drain of the amplifier transistor and the other end connected to a power supply terminal, wherein at least one of the address transistor and the load transistor is a depletion transistor.