LA76070 查看數據表（PDF） - SANYO -> Panasonic

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LA76070

NTSC Color Television IC

SANYO -> Panasonic 

LA76070

Chrominance Block - Input Signals and Measurement Conditions

Unless otherwise indicated, set up the following conditions for each of the following measurements.

1. VIF and SIF blocks: No signal

2. Deflection block: Input a horizontal and vertical composite synchronizing signal, and assure that the deflection block

is locked to the synchronizing signal. (Refer to the “Deflection Block - Input Signals and Measurement Conditions”

section.)

3. Bus control conditions: All conditions set to the initial conditions unless otherwise specified.

4. Y input: No signal

5. C input: The C1IN input (pin 40) must be used.

6. The following describes the method for calculating the demodulation angle.

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

B-Y axis

G-Y axis

7. The following describes the method for calculating the AF angle.

BR ... The ratio between the B-Y and R-Y demodulator outputs.

θ ...... ANGBR: The B-Y/R-Y demodulation angle

[ ] R-Y/B-Y × BR-Cosθ

AFXXX = tan-1

Sinθ

8. Attach a TV crystal externally to pin 15.

No. 5844-14/27

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