Title :
A study of the transfer function of contact-modulated amplifiers
Author :
Krantz, F. H. ; Salati, O. M. ; Berkowitz, R. S.
Author_Institution :
Burroughs Corporation, Paoli, Pa.
fDate :
3/1/1957 12:00:00 AM
Abstract :
CONTACT MODULATORS, or ¿choppers,¿ are frequently used in modern circuit design where modulation (or demodulation) at a fixed frequency is required. Their advantages for this service include extremely high ratios of open-circuit to closed-circuit resistance, almost negligible internal noise, and excellent stability and reproducibility. These properties make the contact modulator particularly suitable for use in several types of d-c and a-c amplifiers as well as in d-c servomechanisms employing a-c control elements.
Keywords :
Attenuation; Contacts; Equations; Frequency modulation; Phase modulation; Transfer functions;
Journal_Title :
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the
DOI :
10.1109/TAI.1957.6367197
