LA76835 Просмотр технического описания (PDF) - SANYO -> Panasonic

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производитель

LA76835

Monolithic Linear IC For PAL/NTSC Color Television Sets VIF/SIF/Y/C/Deflection Implemented in a Single Chip

SANYO -> Panasonic 

LA76835NM

Chroma Block Input Signals and Test Conditions

Unless otherwise specified, the following conditions apply when each measurement is made.

1. VIF, SIF blocks: No signal

2. Y input to pin 52:

Unless otherwise specified, the deflector must be locked to the synchronous signal when the 0 (IRE) signal and the

horizontal/vertical composite signal are entered.

3. C input: C IN (pin 54) input

4. Bus control conditions:

Set red and blue drives to DAC at which the Y-signal level of pins 18, 19 and 20 becomes as close to R = G = B as

possible. Assume here that Gamma Def. is 1 (default), Video SW=”1”, and C.Ext=”1”. Set the following conditions

unless otherwise specified.

5. Adjust an external X-tal of pin 46 so that the series capacity and resistor impedance (Z) become as follows:

Z=0deg @3.579545MHz±10Hz

-40±1deg@3.579545MHz

6. How to calculate the demodulation ratio and angle as follows:

B-Y axis angle = tan-1(B(0)/B(270))+270°

R-Y axis angle = tan-1(R(180)/R( 90))+90°

G-Y axis angle = tan-1(G(270)/G(180))+180°

R-Y axis

90°

180°

G(180)

R(90)

G(270)

R(180)

B(270)

B(0)

0°

B-Y axis

G-Y axis

270°

No.7962-15/50

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