US PATENT SUBCLASS 330 / 81
.~ At least one push-pull signal stage


Current as of: June, 1999
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330 /   HD   AMPLIFIERS

75  DF  SIGNAL FEEDBACK {20}
81.~ At least one push-pull signal stage {2}
82  DF  .~.~> Positive and negative feedback
83  DF  .~.~> Including D.C. path for signal feedback


DEFINITION

Classification: 330/81

(under subclass 75) Subject matter including at least one stage of push-pull signal amplification.

(1) Note. For the definition of a stage of push-pull amplification see the class definition, Glossary.

SEE OR SEARCH THIS CLASS, SUBCLASS:

77, for amplifiers having at least one push-pull stage and including feedback means to compensate for inter-electrode impedances.

118, for amplifiers having at least one push-pull stage. See the search notes thereunder. See also (1) Note above.