Light Receiving Device

A light receiving device comprising a circuit pattern including a first light receiving part, a second light receiving part, a first output terminal, and a second output terminal, which are formed on a same substrate, each of the first light receiving part and the second light receiving part having:

• a semiconductor layered part forming a PN or PIN junction photodiode structure having a first conductivity type semiconductor layer and a second conductivity type semiconductor layer;
• a first electrode connected to the first conductivity type semiconductor layer;
• and
• a second electrode connected to the second conductivity type semiconductor layer,
• wherein the first electrode of the first light receiving part is connected to the first electrode of the second light receiving part,
• the second electrode of the first light receiving part is connected to the first output terminal,
• the second electrode of the second light receiving part is connected to the second output terminal, and
• wherein a difference between signals generated in the first light receiving part and the second light receiving part is output between the first output terminal and the second output terminal.