(under subclass 75) Subject matter involving plural amplifier channels combined in addition, for one or more channels, with signal feedback means above.
(1) Note. Subject matter wherein the signal feedback is derived from the signal output of one amplifier signal channel and applied to the signal input of another amplifier signal channel, is classified in this subclass.
(2) Note. For the definition of plural amplifier channels see subclass 124 below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
124+, for amplifiers with plural amplifier channels. See the notes and search notes thereunder.
