US PATENT SUBCLASS 396 / 228
.~ Having log transformation circuit

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

213  DF  EXPOSURE CONTROL CIRCUIT {23}
228.~ Having log transformation circuit {2}
229  DF  .~.~> Digital
230  DF  .~.~> Antilog

DEFINITION

Classification: 396/228

Having log transformation circuit:

(under subclass 213) Subject matter in which the exposure control circuit includes means to convert a voltage or current to a voltage or current having a logarithmic function.

SEE OR SEARCH THIS CLASS, SUBCLASS:

, FOR 725+, for foreign art collections involving camera automatic exposure control having a logarithmic transformation.