Semiconductor color sensor having an identification of the object color capacity by three photodiodes PD1, PD2, PD3 and three color filters X-PHOTO, Y-PHOTO and Z-PHOTO constitution. Respectively mounted on each of the photo diode red (R), green (G), blue
(B) color filters, from the reflected object light decomposed into three colors. After the color signal op amps after enlarging processing, processing logic depending on the combination of the color obtained after the actual output. Figure 7-23 is a color sensor s amplification circuit, the X, Y, Z output colors. The practical application of color vision based on the circuit.