Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1980-01-03
1981-10-06
Bookbinder, Marc E.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
330263, 330268, 330267, H04N 514
Patent
active
042938759
ABSTRACT:
The video amplifier circuit comprises a complementary symmetrical arrangement of a first and second solid state transistor element with the video input source coupled through a level shifting circuit to the first element and through a DC level shifting circuit to the second element and with means provided for operating each element in a clamped mode approaching saturation. Additional circuit modifications include means for modulating the video input signal with a high frequency signal to cause continuous gray scale variation.
REFERENCES:
patent: 3499104 (1970-03-01), Austin
patent: 4035840 (1977-07-01), Teuling
patent: 4197558 (1980-04-01), Rutishauser
Bookbinder Marc E.
Lieberstein Eugene
Masinick Michael A.
Telegram Communications Corp.
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