TDA8214 데이터 시트보기 (PDF) - STMicroelectronics

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TDA8214

HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT

STMicroelectronics 

TDA8214B

GENERAL DESCRIPTION

The TDA8214B performs all the video and power

functions required to provide signals for the line

driver and frame yoke.

It contains:

- A synchronization separator

- An integrated frame separator without external

components

- A saw-tooth generator for the frame

- A power amplifier for direct drive of frame yoke

(short circuit protected)

- An open collector output for the line driver

Figure 1 : Synchronization Separator Circuit

- A line phase detector and a voltage control oscil-

lator

- A super sandcastle generator

- Video identification output.

The slice level of sync-separation is fixed by value

of the external resistors R1 and R2. VR is an

internally fixed voltage.

The sync-pulse allows the discharge of the capaci-

tor by a 2 x I current. A line sync-pulse is not able

to discharge the capacitor under VZ/2. A frame

sync-pulse permits the complete discharge of the

capacitor, so during the frame sync-pulse Q3 and

Q4 provide current for the other parts of the circuit.

Video

VR

20

R1

R2

SL1 SL2

Figure 2 : Frame Separator

I

SL1

3I

Vz

Q3

ST1

Vz /2

Q4

ST2

5/9

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