US PATENT SUBCLASS 330 / 191
.~ D.C. coupled

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

185  DF  INPUT NETWORKS {3}
191.~ D.C. coupled

DEFINITION

Classification: 330/191

(under subclass 185) Subject matter wherein the input coupling circuit has a D.C.. conductive path from the signal input source to the signal input electrode of the amplifying device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, for periodic switching for input-output comparison including drift corrected D.C.. amplifiers.

10, for modulator-demodulator amplifiers for amplifying D.C.. signals.

53+, for amplifiers having distributed parameter coupling means which may have a D.C.. conductive path.

125, for plural amplifier channels involving a D.C.. and an A.C. amplifier channel. 159, for interstage D.C.. coupling to cathode.

161, for interstage D.C.. coupling to screen grid or electrode other than control grid or cathode.

163, for D.C.. interstage coupling from grid or between grid and anode.

173, for D.C.. interstage coupling from cathode.

181+, for D.C.. interstage coupling.

187, for cathode input D.C.. coupling.

194, for D.C.. coupling from cathode.

198, for D.C.. output coupling.