STV0042 데이터 시트보기 (PDF) - STMicroelectronics

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STV0042

SATELLITE SOUND AND VIDEO PROCESSORS

STMicroelectronics 

STV0042A

PIN INTERNAL CIRCUITRY

S2 VID RTN, CLAMP IN

50µA source is active only when VIDIN < 2.7V.

Figure 1

50µA

VDD 9V

S2 VID RTN

CLAMP IN

10kΩ

1µA

1

VDD 5V

1

GND 0V

S1 VID OUT, S2 VID OUT

Same as above but with no black level adjustment.

Figure 3

60Ω

VCC 12V

VID MUX

4

2.3mA

GND 0V

10kΩ

20kΩ

S1 VID OUT

S2 VID OUT

VREF 2.4V

20kΩ

GND 0V

UNCL DEEM

Same as above but with no black level adjustment

and slightly different gain.

Figure 4

60Ω

VCC 12V

4

UNCL DEEM

IN

2.3mA

10kΩ

GND 0V

25kΩ

VREF 2.4V

16.7kΩ

GND 0V

VIDEEM1

Ron of the transistor gate is ≈10kΩ.

Figure 5

6µ/2µ

10µ/2µ

VIDEEM1

1

125µA

VIDEEM2 / 22kHz

Ron of the transistor gate is ≈10kΩ.

Figure 6

6µ/2µ

10µ/2µ

VIDEEM2/22kHz

1

125µA

VDD 5V

100µ/2µ

60µ/2µ

22kHz

VID IN

Figure 7

VID IN

VREF 2.4V

10kΩ

6.5kΩ

+

0.5pF

GND 0V

1

85µA

PK OUT

Figure 8

Audio

VDD 9V

1

3.4V

Peak Detector

1 5kΩ

Clamp

PK OUT

12/24

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