US PATENT SUBCLASS 235 / 462.27
.~.~.~.~.~ Analog to square wave converter (e.g., digitizer, binarizer, slicer)

Current as of: June, 1999
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235 /   HD   REGISTERS

435  DF  CODED RECORD SENSORS {9}
439  DF  .~ Particular sensor structure {8}
454  DF  .~.~ Optical {10}
462.01  DF  .~.~.~ Bar code {20}
462.25  DF  .~.~.~.~ Reader processing circuitry {4}
462.27.~.~.~.~.~ Analog to square wave converter (e.g., digitizer, binarizer, slicer)

DEFINITION

Classification: 235/462.27

Analog to square wave converter (e.g., digitizer, binarizer, slicer):

(under subclass 462.25) Subject matter including means for changing a continuously variable voltage signal from the photo-detector into a signal having only two discrete levels, one representing the bars and the other, the spaces.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

100+, for signal converting, shaping or generating.

341, Coded Data Generation or Conversion,

200, for a quantizer.

358, Facsimile, 465+, for thresholding an image signal to determine the level (black or white) of the image.

382, Image Analysis,

270+, for image restoration using variable threshold, gain, or slice level of an image signal.