Voting method and apparatus of digital/analog signal in triple control system

PURPOSE: A method and an apparatus for voting digital and analog signals in a triple control system are provided to form various voting logics according to the purpose of a user. CONSTITUTION: A voting device includes a digital signal input unit(310), an FPGA(Field Programmable Gate Array) logic unit(320), a digital signal output unit(330) and a switch unit(340). The digital signal input unit transmits an integrity signal indicating the failure state of each digital output module, and a control signal from three digital output modules to the FPGA logic unit. The FPGA logic unit determines the failure of the each digital output module using the integrity signal. [Reference numerals] (310) Digital signal input unit; (320) FPGA logic unit; (330) Digital signal output unit; (340) Switch unit; (AA) First digital output module; (BB) Second digital output module; (CC) Third digital output module