US PATENT SUBCLASS 330 / 153
.~ Including a cathode follower stage


Current as of: June, 1999
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330 /   HD   AMPLIFIERS

152  DF  CASCADED DIFFERENTLY COUPLED BETWEEN STAGES {2}
153.~ Including a cathode follower stage


DEFINITION

Classification: 330/153

(under subclass 152) Subject matter wherein at least one of the interstage coupling means has a cathode follower signal output.

(1) Note. If only the coupling of the last stage is a cathode follower and none of the previous stages has a cathode follower output, classification is not in this subclass. For classification of cathode follower amplifiers and analogous subject matter see search notes immediately following.

SEE OR SEARCH THIS CLASS, SUBCLASS:

119, for push-pull vacuum tube amplifiers including cathode followers.

168, and 172+, for amplifiers having a cathode follower in the interstage coupling.

193+, for amplifiers with cathode follower output coupling.

310+, for cascaded semiconductor amplifiers which may have an emitter follower stage analogous to cathode follower in a cascaded vacuum tube amplifier.