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Model No.: 14LAANZACDC
Version: 1.0
IC DATA AND SERVICE DATA
LA76818A SMALL SIGNAL PROCESSING CIRCUIT
1. Features
LA76818A is a multi system color TV specific monolithic IC developed by SANYO Co. in 2002,
which is controlled by the I
2
C bus. LA76818 comprises a tuning circuit and all small signal
processing circuit including a PIF /SIF /luminance and chroma signal processing circuit, PAL
/NTSC processing circuit, RGB signal processing and controlling circuit, horizontal /vertical
small signal processing, SIF processing and demodulating circuit and volume controlling circuit.
It has following features.
Multi system IF processing, high-gain IF amplifier and AGC without adjustment
needed except IF phase-locked VCO coil. A buss eliminator is also built-in the IC.
Video PLL detector improves video detection characteristic and picture /sound
quality greatly.
Video /audio switchover switch built-in.
Built-in luminance delay line, aperture correcting circuit, coring circuit and black
level stretching circuit improve picture quality greatly.
Color signal trap and band pass filter, skin tone control circuit and white balance
auto adjusting circuit built in.
Analog OSD and RGB switchover control circuit built-in with fast RGB blanking.
The horizontal /vertical scanning circuit uses dual auto frequency adjustment,
50/60Hz auto decision with constant vertical picture when no signal received.
SECAM signal decoding offers together with LA7642N
In addition, LA76818 features also sandcastle pulse generation, SECAM control clock output, PWM
pulse width modulation and control.
