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參數(shù)資料
| 型號： | TDA9116 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
| 中文描述： | 低費(fèi)用的I2C可控?fù)隙榷嗤斤@示器處理器 |
| 文件頁數(shù)： | 32/47頁 |
| 文件大?。?/td> | 725K |
| 代理商： | TDA9116 |
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TDA9116
32/47
f
VO(0)
=
The frequency range in which the AGC loop can
regulate the amplitude also depends on this ca-
pacitor.
The C- and S-corrections of shape serve to com-
pensate for the vertical deflection system non-line-
arity. They are controlled via CCORand SCOR
I
2
C bus controls.
Shape-corrected sawtooth with regulated ampli-
tude is lead to amplitude control stage. The dis-
charge exponential is replaced by
V
level,
which, under control of the CONTROLLER, cre-
ates a rapid falling edge and a flat part before be-
ginning of new ramp. Mean value of the waveform
output on pin VOut is adjusted by means of VPOS
Figure 11. Vertical section block diagram
I
2
C bus control, its amplitude through VSIZEI
2
C
bus control. Vertical moiré is superimposed.
The biasing voltage for external DC-coupled verti-
cal power amplifier is to be derived from V
RefO
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 V
RefO
value (and so
mean output value) between particular devices.
10.4.2 - Vertical moiré
To blur the interaction of deflection lines with CRT
mask grid pitch that can generate moiré pattern,
the picture position is to be alternated at half-frame
frequency. For this purpose, a square waveform at
half-frame frequency is superimposed on the out-
put waveform’s DC value. Its amplitude is adjusta-
ble through VMOIREI
2
C bus control.
C
(VCap)
.100Hz
150nF
2
Synchro
Polarity
Controller
Discharge
22
Sampling
Sampling
Capacitance
S-correction
CCOR
C-correction
18
23
V
VOB
sawtooth
discharge
REF
Charge current
Transconductance amplifier
(I
2
C)
SCOR
(I
2
C)
20VAGCCap
VSIZE
(I
2
C)
VMOIRE
(I
2
C)
VPOS
(I
2
C)
19
VOscF
VOut
VEHTIn
VCap
VSyn
OSC
Cap.
Q1
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