This paper has proved, by using Weinreich relation, that a carrier depletion effect is a main cause for power saturation phenomena in the acoustic bulk-wave (BAW) amplifiers formerly reported. By using this proof, a standard of the saturation power in several kinds of acoustic surface-wave (SAW) amplifiers is derived in a general form, and it is indicated that monolithic SAW amplifiers are better suited for obtaining high saturation power than compound-medium ones. The large signal amplification characteristics of the monolithic SAW amplifier are studied theoretically by using a simple analytical nonlinear theory as well as computer calculations and also experimentally by using CdS SAW amplifiers. Finally, it is proposed that the acoustic wave amplifier could have a higher saturation power under constant current drive than under constant field drive.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.