Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2006-07-25
2006-07-25
Natnael, Paulos M. (Department: 2614)
Television
Image signal processing circuitry specific to television
Gray scale transformation
Reexamination Certificate
active
07081926
ABSTRACT:
An automatic gain control apparatus for a video signal and adjusting method thereof, An RF(Radio Frequency) automatic gain control apparatus receives a reproduced video signal from a demodulator, controlling a gain of an RF amplifier according to the reproduced video signal. An IF(Intermediate Frequency) automatic gain control apparatus receives a reproduced video signal from a demodulator, controlling a gain of an IF amplifier according to the reproduced video signal. In the meantime, a RF automatic gain control compensating unit detects an input signal provided to the IF amplifier, checking whether the detected IF input signal meets a reference level, controlling for raising a voltage of the RF automatic gain control apparatus if the detected IF input signal is lower than the reference level, controlling for lowering a voltage of the RF automatic gain control apparatus if the detected IF input signal is higher than the reference level.
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Hwang Tae-don
Jeong Hong-seok
Natnael Paulos M.
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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