cxa1853aq Sony Electronics, cxa1853aq Datasheet - Page 31

• Manufacturer Part Number: cxa1853aq
• Description: Rgb Driver For Lcd
• Manufacturer: Sony Electronics

Gamma compensation
The gamma compensation curve establishes the gain change points (breakpoints) on both the black and white
sides from the reference level. The black and white side gains and the black and white side gain change points
can each be adjusted independently.
Sample-and-hold, gain control and pedestal clamp
Since sample-and-hold circuits are established in the R, G and B lines and each of these circuits is operated
by an independent pulse, the delay can be set freely. In addition, the pulse leak is canceled by establishing a
sample-and-hold circuit in the clamp loop and inputting the differential input of the gain control circuit.
Reference level
57, 58, 61
S/H pulse
Output
S/H
56
Gain adjustment
51 to 53
Clamp capacitance
Input
S/H
S/H
Clamp pulse
– 31 –
Error amplifier
Gain control amplifier
Reference level
Output
Clamp voltage
Breakpoint variation
To the
inversion
circuit
Input
45
CXA1853AQ