TEA2031A Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

TEA2031A

COLOR TV EAST-WEST CORRECTION

STMicroelectronics 

TEA2031A

Figure 2. Pin Connections

MULTIPLIER INPUT 1

1

1 AND 2 CAN BE INVERTED

MULTIPLIER INPUT 2

2

CURRENT REFERENCE

3

GROUND

4

8

COMPARATOR INPUT 2

7

MULTIPLIER OUTPUT AND COMPARATOR INPUT 1

6

VCC POWER SUPPLY

5

OUTPUT

Figure 3. Block Diagram

Line SAW-TOOTH

VCC +24V

8

7

6

100Ω

50µA

VCC

Comparator

120µA

K . (I1 - I2) 2

6.8mH

5

To DIODE

MODULATOR

Multiplier

i1

1

VREF

i2

2

6.3V

34

TEA2031A

DC

Frame

SAW-TOOTH

GENERAL DESCRIPTION

The TEA2031A is intended to provide to 110° color

TV sets a parabolic and keystone frame rate mod-

ulated correction in addition to the main horizontal

scanning.

A stable 6.3V internal reference provides current

and voltage references to the whole IC.

Pins 1 and 2 are two symmetrical inputs of an on-

chip multiplier circuit and are internally held at

6.3V reference potential level. Current inputs to

these pins are drawn from external sources via ap-

propriate resistors. The frame saw-tooth wave-

form which has a peak-to-peak value of around 3

volts and a mean value of about 2.5 volts, supplies

2/11

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