US PATENT SUBCLASS 330 / 72
.~.~ Amplifier devices in arms of a bridge

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

70  DF  ANODE ENERGIZED THROUGH DISCHARGE PATH OF CONTROLLED VACUUM TUBE {3}
71  DF  .~ Plural discharge paths traversed by anode supply {1}
72.~.~ Amplifier devices in arms of a bridge

DEFINITION

Classification: 330/72

(under subclass 71) Subject matter including two pairs of series energized tubes wherein one tube of each pair is supplied through its space discharge path with anode-cathode power supply current from the power supply source, and wherein each of the four vacuum tubes is arranged in the arms of a Wheatstone bridge.