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參數(shù)資料
| 型號： | TDA9112A |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 偏轉(zhuǎn) |
| 英文描述： | HORIZ/VERT DEFLECTION IC, PDIP32 |
| 封裝： | PLASTIC, SDIP-32 |
| 文件頁數(shù)： | 41/60頁 |
| 文件大小： | 831K |
| 代理商： | TDA9112A |
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TDA9112A
46/60
9.6
Dynamic correction outputs section
9.6.1
Composite horizontal and vertical
dynamic correction output HVDyCor
A composite waveform is output on pin HVDyCor. It
consists of a parabola of vertical deflection fre-
quency, on which a parabola of horizontal deflec-
tion frequency is superimposed. The two parabolic
components can independently be adjusted via
IC-bus, the vertical parabola in amplitude (
HVDC-
VAMP IC-bus control), the horizontal parabola in
amplitude,
phase
and
shape
(
HVDC-HAMP,
HVDC-HPH and HVDC-HSHAP IC-bus controls).
See also Chapter 8 - page 27 chapter. The influence
of the vertical component can be nullified by ad-
justing its control to minimum. For horizontal
waveform component, refer to Figure 16 and Figure
17
. The minimum value in
HVDC-HAMP IC-bus
control does not correspond to null horizontal am-
plitude. The phase of the horizontal parabola can
roughly be adjusted via HDyCorPh IC-bus bit for
the waveform’s start to coincide either with the be-
ginning or the middle of the H-flyback pulse. More-
over, its centre can be offset via
HVDC-HPH IC-
bus control. The shape of the horizontal parabola
can be adjusted via
HVDC-HSHAP IC-bus control
from a power-of-two to about a power-of-four. Be-
tween the waves of two subsequent lines, a flat is
inserted at level corresponding to the beginning of
the new wave. Putting HDCFlatEn and HDyCorPh
to “1” will cause the flat part to begin at start of H-
flyback and end a delay after its middle. Only this
delay (its duration is quasi-constant) is applied
when HDCFlatEn is at “0”. Refer to electrical spec-
ifications for values.
The horizontal parabola component tracks with
value in
HSIZE control provided that HDyCorTr IC
bit is set to 1 (0 by default).
As the vertical parabola component is generated
from the output vertical deflection drive waveform,
it tracks with real vertical amplitude and position. It
is not affected by C- and S-corrections or vertical
breathing compensation. It does not track with
Vertical size after-gain (Sad1Dh) nor with Vertical
position offset (Sad1Eh) adjustments.
The polarity of the HVDyCor output can be adjusted
via HVDyCorPol IC-bus bit.
9.6.2
Vertical dynamic correction output
VDyCor
A parabola at vertical deflection frequency is avail-
able on pin VDyCor. Its amplitude is adjustable via
VDC-AMP IC-bus control and polarity controlled
via VDyCorPol IC-bus bit. It tracks with real verti-
cal amplitude and position. It is not affected by C-
and S-corrections or breathing compensation. It
does not track with
Vertical size after-gain
(Sad1Dh)
nor
with
Vertical
position
offset
(Sad1Eh) adjustments.
The use of both correction waveforms is up to the
application (e.g. dynamic focus, dynamic bright-
ness control).
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