參數(shù)資料
型號: TDA935X
廠商: NXP Semiconductors N.V.
英文描述: TV signal processor-Teletext decoder with embedded m-Controller
中文描述: 電視信號處理器與嵌入式米圖文電視解碼器控制器
文件頁數(shù): 133/140頁
文件大?。?/td> 570K
代理商: TDA935X
1999 Sep 28
133
Philips Semiconductors
Preliminary Device Specification
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA935X/6X/8X series
TEST AND APPLICATION INFORMATION
East-West output stage
In order to obtain correct tracking of the vertical and
horizontal EHT-correction, the EW output stage should be
dimensioned as illustrated in Fig.55.
Resistor R
EW
determines the gain of the EW output stage.
Resistor R
c
determines the reference current for both the
vertical sawtooth generator and the geometry processor.
The preferred value of R
c
is 39 k
which results in a
reference current of 100
μ
A (V
ref
= 3.9 V).
The value of R
EW
must be:
Example: With V
ref
= 3.9 V; R
c
= 39 k
and V
scan
= 120 V
then R
EW
= 68 k
.
R
EW
R
c
V
18
×
V
ref
----------------------
×
=
handbook, full pagewidth
MLA744 - 1
HORIZONTAL
DEFLECTION
STAGE
DIODE
MODULATOR
VDD
Vscan
VEW
Rew
EW output
stage
EWD
Csaw
100 nF
(5%)
Vref
Rc
39 k
(2%)
Iref
43
21
20
49
27
28
25
Fig. 55 East-West output stage.
TDA8366
935X
TDA 935X/6X/8X
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