TEA2037 ST Microelectronics, TEA2037 Datasheet - Page 5

• Manufacturer Part Number: TEA2037
• Description: HORIZONTAL AND VERTICAL DEFLECTION MONITOR
• Manufacturer: ST Microelectronics

Figure 3 : Line Oscillator
Figure 4 : Phase Comparator
The sync-pulse drives the current in the compara-
tor. The line flyback integrated by the external
network gives on pin 11 a saw tooth, the DC offset
of this saw tooth is fixed by VC. The comparator
output provides a positive current for the part of the
signal on pin 11 greater than to VC and a negative
Line
Flyback
Integrated
Flyback
Sync Pulse
Output
Current
Comparator
Output
Phase
R5
9
R4
V
C
current for the other part. When the line flyback and
the video signal are synchronized, the output of the
comparatoris an alternativelynegative and positive
current. The frame sync-pulse inhibits the compa-
rator to prevent frequency drift of the line oscillator
on the frame beginning.
Figure 5
ST1
10
ST2
V
CC1
11
TEA2037A
V
C
V
CC1
5/9