LA7696 查看數據表（PDF） - SANYO -> Panasonic
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LA7696 Datasheet PDF : 6 Pages
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Block Diagram
LA7696
Auto Green Function
Basic Operation
When a standard NTSC demodulator is used to demodulate green color, an original green color turns bluish green. The
auto green function works to reduce the B-Y component for green color correction so that the original green color can
be reproduced faithfully. This corrention can be provided in the range shown in Fig. 1.
Fig. 1. Auto Green Correction Range
The auto green function compares each color difference signal of R-Y, G-Y, B-Y and if the G-Y component is larger
than the R-Y, B-Y components the B-Y component is reduced in proportion to the difference between them.
The auto green function is also capable of providing your desired correction by setting the control voltage on pin 12.
When the control voltage on pin 12 is changed as 0V → 12V, the input signals are changed equivalently as shown in
Example 1. Actually, 5.2V offset given to R-Y, G-Y, B-Y with -Y=4V causes the B output (pin 14 of LA7696) to
change as 4.83V → 4.64V.
No.2921–3/6
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