Patent ID: 7667272

Claim:
A semiconductor device comprising: a current mirror circuit; and a photoelectric conversion device electrically connected to the current mirror circuit, wherein the current mirror circuit comprises: a first transistor having a first gate electrode, a first source electrode, and a first drain electrode; a second transistor having a second gate electrode, a second source electrode, and a second drain electrode; a first terminal electrically connected to the first drain electrode and the second drain electrode; a second terminal electrically connected to the first source electrode and the second source electrode; a first resistor in a first path from the first terminal to the second terminal through the first drain electrode and the first source electrode; and a second resistor in a second path from the first gate electrode to a contact point, wherein the first gate electrode is electrically connected to the second gate electrode through the contact point, wherein the first gate electrode is electrically connected to the first drain electrode, and wherein each of the first gate electrode, the first source electrode, the first drain electrode, the second gate electrode, the second source electrode, and the second drain electrode have a parasitic resistor.