TDA935x Philips, TDA935x Datasheet - Page 111

• Manufacturer Part Number: TDA935x
• Description: TV Signal Processor-Teletext Decoder with Embedded u-Controller
• Manufacturer: Philips

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.45.
Resistor R
Resistor R
vertical sawtooth generator and the geometry processor.
The preferred value of R
reference current of 100 A (V
2001 Jan 18
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.
UOC series
c
39 k
(2%)
is 39 k which results in a
R c
I ref
TDA
TDA8366
50
ref
28
20
V ref
= 3.9 V).
935X
49
27
21
43
21
C saw
15
100 nF
(5%)
EWD
Fig.45 East-West output stage
EW output
stage
R ew
111
The value of R
Example: With V
then R
R
EW
HORIZONTAL
DEFLECTION
MODULATOR
=
EW
DIODE
STAGE
R
V DD
TDA935X/6X/8X PS/N2 series
= 68 k .
c
MLA744 - 1
---------------------- -
18 V
EW
V
scan
ref
must be:
= 3.9 V; R
V scan
V EW
ref
Tentative Device Specification
c
= 39 k and V
scan
= 120 V