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參數(shù)資料
| 型號： | TDA9112A |
| 廠商： | 意法半導體 |
| 英文描述： | HIGH-END I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
| 中文描述： | 高端的I2C可控撓度多同步顯示器處理器 |
| 文件頁數(shù)： | 41/60頁 |
| 文件大?。?/td> | 781K |
| 代理商： | TDA9112A |
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TDA9112A
41/60
9.4.5
To blur potential moiré patterns due to interaction
of deflection lines with CRT mask grid, the picture
position is to be slightly alternated at frame fre-
quency. For this purpose, a square waveform at
half-frame frequency is superimposed on the out-
put waveform. Its amplitude is adjustable through
VMOIRE
I2C-bus control.
Figure 12. Vertical section block diagram
Vertical moiré
9.4.6
The biasing voltage for external DC-coupled verti-
cal power amplifier is to be derived from
VRefO
voltage provided on pin
RefOut
, using a resistor di-
vider, this to ensure the same temperature drift of
mean (DC) levels on both differential inputs and to
compensate for spread of
VRefO
value (and so
mean output value) between particular devices.
Biasing of vertical booster
Synchro
Polarity
Controller
Discharge
Sampling
Sampling
Capacitance
C-correction
Charge current
Trans-conductance amplifier
VOscF
VOut
VCap
22
VSyn
OSC
Cap.
Q1
VEHTIn
VAGCCap
VSIZE
(I2C)
SCOR
(
I2C)
CCOR
(I2C)
VMOIRE
(I2C)
VPOF
(I2C)
VPOS
(I2C)
VSAG
(I2C)
S-correction
VVOB
Internal
V-ramp
20
18
23
19
2
VPOS
(I2C)
sawtooth
discharge
VVOTref
Vmidref
To geometry processing
VEHTG
(I2C)
VVEHTnull
R
R
Vmidref
Vmidref
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| TDA9116 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
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