TDA9550 PHILIPS [NXP Semiconductors], TDA9550 Datasheet - Page 119

• Manufacturer Part Number: TDA9550
• Description: TV signal processor-Teletext decoder with embedded m-Controller
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
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.49.
Resistor R
Resistor R
vertical sawtooth generator and the geometry processor.
The preferred value of R
reference current of 100 A (V
2000 Jun 22
handbook, full pagewidth
TV signal processor-Teletext decoder with
embedded -Controller
EW
c
determines the reference current for both the
determines the gain of the EW output stage.
c
is 39 k which results in a
UOC series
39 k
(2%)
ref
R c
I ref
= 3.9 V).
TDA
TDA8366
28
20
50
V ref
935X
27
21
49
21
15
43
C saw
100 nF
(5%)
Fig. 49 East-West output stage.
EWD
EW output
119
stage
R ew
The value of R
Example: With V
then R
R
EW
=
EW
R
TDA955X/6X/8X PS/N1 series
HORIZONTAL
DEFLECTION
MODULATOR
= 68 k .
c
DIODE
STAGE
V DD
---------------------- -
18 V
EW
V
MLA744 - 1
scan
ref
must be:
= 3.9 V; R
ref
V scan
V EW
Tentative Device Specification
c
= 39 k and V
scan
= 120 V