Normalizing circuit for color printing system

Details Normalizing circuit for color printing system Normalizing circuit for color printing system

1980-06-16

1982-06-15

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, G03F 300

Patent

active

043353991

ABSTRACT:
A normalizing circuit for conducting sensitivity correction and gamma correction by a coded signal from a computer. The coded sensitivity signal from a computer is D-A converted to an analog signal and put into an operational amplifier to be added to or subtracted from a density signal. The sensitivity corrected signal thus obtained is sent to a gamma correcting circuit. The gamma correcting circuit is composed of a plurality of analog switches, and a plurality of resistors connected in series or parallel with each other to be changed over by the analog switches. The analog switches are operated by the gamma correcting signal. An operational amplifier is controlled as to its gain by the resistance of the resistors connected with the input or the feed-back thereof.

REFERENCES:
patent: 4189742 (1980-02-01), Klopsch
patent: 4204223 (1980-05-01), Gast

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