Provided is a multiplexing signal processing device based on a passive element including a plurality of signal converters that respectively process a plurality of input signals and are arranged in a matrix consisting of N rows and M columns and include N signal converter blocks respectively connected to N row unit output terminals; and M signal converter blocks respectively connected to M column unit output terminals. The signal converters each include a first diode having an input terminal connected to an input signal node, a second diode having an input terminal connected to the input signal node, and a ground resistor coupled to the input signal node.