Transfer function of contact-modulated amplifiers

MOST, IF NOT ALL, of the theory of carrier systems for d-c amplification has been based on the use of sinusoidal modulators. In general, this approach has been adequate for showing the equivalence of such systems to direct-coupled systems in many steady-state and transient characteristics. Such analyses are only applicable to contact-modulated systems in the broadest sense, however, and completely fail to indicate special types of transfer functions arising from the unique properties of the contact modulators.