FIELD: television engineering. SUBSTANCE: device designed for use in television sets of SECAM, NTSC, and PAL systems, in particular for automatic color control functions to maintain constant level of color subcarrier in case signal-to-noise ratio drops in color subcarrier signal of SECAM system by multiplying mentioned signal by sine- and cosine-wave signals of local subcarrier signal and separating only low component of base frequency band from output signal beat components. Automatic color control is effected by maintaining constant amplitude of color subcarrier signal even in case signal-to-noise ration of color subcarrier drops when using color signal reproduction circuit generally in three basic world television systems. EFFECT: enlarged functional capabilities. 7 cl, 27 dwg
