US PATENT SUBCLASS 250 / 208.5
.~.~.~ With photodetector output ratioing other than by bridge or push-pull circuits

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
206  DF  .~ Photocell controlled circuit {9}
208.2  DF  .~.~ Plural photosensitive nonimage detecting elements {4}
208.5.~.~.~ With photodetector output ratioing other than by bridge or push-pull circuits

DEFINITION

Classification: 250/208.5

With photodetector output ratioing other than by bridge or push-pull circuits:

(under subclass 208.2) Subject matter in which circuit means

are provided for forming a ratio of the outputs of two or more photodetectors other than by using bridge or push-pull circuits.

(1) Note. This subclass provides for many circuits which form ratios digitally rather than by older bridge or push-pull circuits. The latter are classified in Class 250, subclass 210.

SEE OR SEARCH THIS CLASS, SUBCLASS:

210, for circuits which form ratios by using bridge or push-pull circuits.