US PATENT SUBCLASS 330 / 161
.~.~ D.C. coupling

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

157  DF  INTERSTAGE COUPLING {11}
160  DF  .~ Coupling to plate or auxiliary grid {1}
161.~.~ D.C. coupling

DEFINITION

Classification: 330/161

(under subclass 160) Subject matter wherein the coupling has a D.C.. conductive path for signal current from the output electrode of the preceding amplifying device to the input, electrode of the following of the two cascaded vacuum tube amplifying devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

191, for a D.C.. amplifier input coupling which may be to an electrode of a vacuum tube amplifying device other than the control grid or cathode.