Optical receiver circuit

An optical receiver circuit comprising:

• a preamplifier to receive, as an input, a current signal outputted by a photoelectric conversion circuit that receives an optical signal and converts the optical signal into a current signal, and to output a first voltage signal by converting the current signal into the voltage signal;
• a reference voltage generating circuit to generate and output a second voltage signal, a direct current voltage used as a reference voltage in single-to-differential conversion;
• and
• a main amplifier to receive, as inputs, the first and second voltage signals and to output a voltage signal or a differential voltage signal by amplifying the differential component between the first and second voltage signals,
• wherein the preamplifier and the reference voltage generating circuit are connected with a first ground potential wiring and a first power supply wiring, which are used in common, and are formed in a first region where elements are formed on a semiconductor substrate to which the potential of the first ground potential wiring is supplied,
• wherein the main amplifier is connected with a second ground potential wiring and a second power supply wiring, which are separated from the first ground potential wiring and the first power supply wiring, and is formed in a second region where elements are formed on the semiconductor substrate to which the potential of the second ground potential wiring is supplied, and
• wherein a substrate supply interval where a first substrate supply position at which the potential of the first ground potential wiring is supplied and a second substrate supply position at which the potential of the second ground potential wiring is supplied are closest to each other is large to an extent where a substrate permeability characteristic, in which noise is fully attenuated in an alternating current (AC) manner, is obtained.