TDA9106 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA9106

LOW COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS

STMicroelectronics 

TDA9106

OPERATING DESCRIPTION (continued)

Figure 18

Horizontal Flyback

Internal Trigged

Horizontal Flyback

Horizontal Focus

Cap Sawtooth

Horizontal Dynamic

Focus Parabola

Output

400ns

Moire Output

4.7V

2V

2V

II.7 - Moire Output

The moire output is intented to correct a beat

between horizontal video pixel period and actual

CRT pixel width.

The moire signal is a combinationof Horizontal and

Vertical frequency signals.

To achieve a moire cancellation, it has to be con-

nected to any point on the chassis controlling the

horizontalposition.We recommend to introducethis

“ Horizontal Controlled Jitter” on the relative ground

Figure 19 : Moire Function Block Diagram

of PLL2 capacitor where this “controlled jitter” fre-

quency type will directly affect the horizontal posi-

tion.The amplitude of the signal is I2C adjustable.

One point to notice is :

- in case H-Moire is not necessary in the applica-

tion, H-Moire output (Pin 2) can be turned to as a

5 bits digital to analog converter output (0.3V to

2.2V V output voltage),

- in case of no use in application, this pin must be

left high impedance(or resistor to ground).

H-SYNC

Ck

Q

D Rst Q

23

V-SYNC

Monostable

Ck

Q

D

Q

Figure 20 : Moire Output Waveform

EVEN FRAME

H

V

MOIRE

ODD FRAME

H

V

MOIRE

23/30

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