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Publication of BE555973ApublicationCriticalpatent/BE555973A/xx
H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
H03F3/14—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only with amplifying devices having more than three electrodes or more than two PN junctions
