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TEA2031A Datenblatt(PDF) 2 Page - STMicroelectronics

Teilenummer TEA2031A
Bauteilbeschribung  COLOR TV EAST-WEST CORRECTION
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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TEA2031A Datenblatt(HTML) 2 Page - STMicroelectronics

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TEA2031A
2/11
Figure 2. Pin Connections
Figure 3. Block Diagram
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
1
2
3
4
8
7
6
5
MULTIPLIER INPUT 1
CURRENT REFERENCE
GROUND
MULTIPLIER INPUT 2
COMPARATOR INPUT 2
MULTIPLIER OUTPUT AND COMPARATOR INPUT 1
OUTPUT
CC
1 AND 2 CAN BE INVERTED
V
POWER SUPPLY
65
87
6.8mH
To DIODE
MODULATOR
123
4
VCC +24V
Multiplier
DC
6.3V
i1
VREF
K . (I1 - I2)
2
VCC
50
µA
Comparator
100
Ω
Line SAW-TOOTH
TEA2031A
120
µA
i2
Frame
SAW-TOOTH


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