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Circuit Operating Descriptions
13-5-3 Amplifier (MM1623)
VIC1 is 6dB amplifier.
Based on CVBS signal, the final output level must be 2Vpp without 75ohm terminal resistance.
Because the level of video encoder output is only 1Vpp, the level is adjusted with the special amplifier.
When mute of pin 3 is high active, if the pin is floating and connect to power, the output signal is never out
putted.
CVBS, Y, C, Y(R), Cb(B), Cr(R) outputted from video encoder are inputted to VIC1 [Pin4, 6, 2, 10, 12, 14] respec
tively.
The signal to which gain is adjusted by amplifier is outputted from jack via 75ohm Resistance
(VR30,31,32,33,34,60).
13-12
Samsung Electronics
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