US PATENT SUBCLASS 330 / 131
.~.~ Control of bias on separate gain control electrode


Current as of: June, 1999
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330 /   HD   AMPLIFIERS

127  DF  WITH CONTROL OF POWER SUPPLY OR BIAS VOLTAGE {2}
129  DF  .~ With control of input electrode or gain control electrode bias {13}
131.~.~ Control of bias on separate gain control electrode


DEFINITION

Classification: 330/131

(under subclass 129) Subject matter wherein the bias control voltage is applied to an electrode of the amplifying device separate and distinct from the electrodes to which the signal input is applied.

(1) Note. Subject matter as above in which the separate and distinct electrode to which the bias voltage is applied is

the screen grid or anode of a vacuum tube amplifying device is not classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

128, for subject matter as above in which the separate and distinct electrode to which the bias voltage is applied is the screen grid or anode of a vacuum tube amplifying device.