To provide the signal multiplication circuit of a neural circuit network, which can realize the neural circuit network realizing a self-systematic function into an electronic circuit, and to provide the application circuit.

Two analog voltage V1 V2 are impressed on a first voltage- frequency converter (V/F-1) 1 and a second voltage frequency converter (V/F-2), which convert voltage into corresponding frequencies. The outputs of V/F-1 and V/F-2 are impressed on a first monostable multi-vibrator (MM-1) and a second monostable multi-vibrator (MM-2) 4. The outputs of MM-1 and MM-2 are impressed on an AND circuit 5 and the output is impressed on a frequency-voltage converter (F/V) 6 so as to obtain final output voltage V3.