(under subclass 144) Subject matter wherein particular magnetic components or components used at very low temperatures near absolute zero form an essential part of a digital to analog conversion.
(1) Note. Excluded from this subclass are ordinary transformers used in power supplies or for signal coupling or inductances use for filtering or decoupling.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15, for a digital pattern reading type converter having a magnetically read pattern.
171, for an analog to digital or analog to digital combined with a digital to analog converter having magnetic or cryogenic components.
SEE OR SEARCH CLASS
235, Registers, 499+, for magnetic coded record sensors.
307, Electrical Transmission or Interconnection Systems,
401+, for nonlinear saturable reactor systems.
360, Dynamic Magnetic Information Storage or Retrieval,
39+, for magnetic recording or reproduction of a digital signal.
