Analog/digital converter having input signal gain control functi

Details Analog/digital converter having input signal gain control functi Analog/digital converter having input signal gain control functi

1991-08-13

1994-01-25

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358464, H04N 138

Patent

active

052820602

ABSTRACT:
A gain control signal is produced according to the difference in level between the signal obtained by scanning the white reference plate and the previously stored standard signal. Based on the gain control signal, the amplification level of the signal obtained by scanning the document is adjusted by a gain controller, and then the resulting signal is converted into a digital signal and supplied outside.

REFERENCES:
patent: 4841374 (1989-06-01), Kotani et al.
patent: 5038225 (1991-08-01), Maeshima
patent: 5105286 (1992-04-01), Sakurai
patent: 5119211 (1992-06-01), Sakurai
patent: 5146351 (1992-09-01), Maehara

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