Patent ID: 7876483

Claim:
An optically reconfigurable logic circuit, comprising: a configuration information input circuit that includes a photoconductive device for causing continuity/interruption in response to light irradiation input, and converts and outputs an optical signal that contains logic circuit configuration information with use of the photoconductive device into an electric circuit configuration signal; and a logic configuration variable circuit for performing logic configuration of an internal circuit on the basis of the circuit configuration signal, the optically reconfigurable logic circuit being characterized in that a control is performed in such a manner that the logic circuit configuration information input from the optical signal is held at a parasitic capacitance (hereinafter referred to as “input capacitor”) between the terminals of the photoconductive device in a non-continuity state as the circuit configuration signal, and as the input capacitor is preset and a next optical signal is input before the held circuit configuration signal disappears due to leak discharge, the logic circuit configuration information is dynamically held at the input capacitor.