An Electronic Analog Multiplier Using Carriers

An electronic analog multiplier is described, which is based on a modulation technique. No dc amplifiers are used, which makes the output entirely free of drifts. All distortions up to the fourth order are eliminated. The experimental model that has been built handles inputs from dc to 7 kc and gives an output from dc to 14 kc. The amplitude range of the output is 50 db.