TSH344I(2006) 데이터 시트보기 (PDF) - STMicroelectronics

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TSH344I
(Rev.:2006)

340MHz Single-Supply Triple Video Buffer

STMicroelectronics 

Using the TSH344 to Drive RGB Video Components

TSH344

4

Using the TSH344 to Drive RGB Video Components

Figure 27. Shapes of video signals coming from DACs

DAC Outputs: RGB

100 IRE

White Level

Black Level 30 IRE

0Volt 0 IRE

Image Content

300mV

1Vp-p

Figure 28. Implementation of the video driver on output video DACs

(1) DAC output

(2) Amplifier output

(3) On the line

Content of the

video signal

300mV

0V

0.7Vp-p

2.6V

600mV

0V

+5V

Amplifier output rail

(3.7V min.)

1.4Vp-p

Amplifier output rail

(70mV max.)

300mV

0V

0.7Vp-p

R

Video

DAC

Reconstruction

Filtering

LPF

0.7Vpp

+6dB

75Ω

75Ω Cable

1.4Vpp

0.7Vpp

75Ω

Video

DAC

G

Reconstruction

Filtering

LPF

0.7Vpp

+6dB

75Ω

75Ω Cable

1.4Vpp

0.7Vpp

75Ω

Video

DAC

B

Reconstruction

Filtering

LPF

0.7Vpp

+6dB

TSH344

-5V

75Ω

1.4Vpp

75Ω Cable

0.7Vpp

75Ω

TV

10/14

Rev. 2

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