TDA8214 ST Microelectronics, TDA8214 Datasheet - Page 7

• Manufacturer Part Number: TDA8214
• Description: HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT
• Manufacturer: ST Microelectronics

Figure 6 : Frame Oscillator
Frame output amplifier
This amplifier is able to drive directly the frame
yoke. Its output is short circuit and overload pro-
tected; it contains also a thermal protection.
The frame blanking is detected by the frame fly-
back generator. When the output voltage of the
frame amplifier exceeds V
detected. The line flyback detection is provided by
a comparator which compares the input line flyback
pulse to an internal reference. The burst gate pulse
position is fixed by the external RC network
(Pin 14). It is referenced to the middle of the line
Figure 7 : Super Sandcastle Generator
Network
RC
INPUT CURRENT
COMPENSATION
Vcc1
2
CC
2-2V
YOKE
Flyback
Output
Frame
BE
Input
Line
10
18
, the pulse is
14
Detection
Detection
To frame amplifier
Blanking
Flyback
Frame
Line
flyback.
This stage will detect the coincidence between the
line sync pulse (if present) and a 2 s sampling
pulse. This 2 s pulse is positionned at the center
of line sync pulse when the phase loop is locked.
This sampled detection is stored by an external
capacitor Pin 8.
The identification output level is high when video
signal is present.
Important remark : minimum saw-tooth amplitude
on Pin 13 has to be 2V
Burst gate
generator
pulse
400 µ A
RC
Vcc1
PP
19
(typ. : 2.5V
Vcc1
sync pulse
Frame
Output
SSC
PP
TDA8214B
).
7/9