US PATENT SUBCLASS 330 / 173
.~.~ D.C. coupling

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330 /   HD   AMPLIFIERS

157  DF  INTERSTAGE COUPLING {11}
172  DF  .~ Coupling from cathode {1}
173.~.~ D.C. coupling

DEFINITION

Classification: 330/173

(under subclass 172) Subject matter wherein the coupling between the two cascaded amplifying devices is a D.C.. conductive path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194, for vacuum tube amplifier device output coupling circuits with D.C.. coupling from the cathode.