CPC Subgroup Additional Only
H03F 2201/3218 the main amplifier or error amplifier being a feedforward amplifier
Full Title
Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00 > Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion > the main amplifier or error amplifier being a feedforward amplifier