US PATENT SUBCLASS 318 / 601
.~.~ Digital comparison

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
600  DF  .~ Digital or numerical systems {3}
601.~.~ Digital comparison {1}
602  DF  .~.~.~> Commutating switch-type encoder

DEFINITION

Classification: 318/601

(under subclass 600) Subject matter in which the system error

signal is obtained by comparison of the digital command signal with a position feedback signal which is also in digital form. Included herein are systems in which the position feedback includes an analog to digital converter for generating the feedback in digital form.

SEE OR SEARCH CLASS

341, Coded Data Generation or Conversion, for code converters, generators or transmitters.