the source circuit of the follower has one or more coils between source and supply

Full Title

Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00 > Indexing scheme relating to amplifiers in which input being applied to, or output being derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower > the source circuit of the follower has one or more coils between source and supply