CXA2050 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA2050

Y/C/RGB/D for PAL/NTSC Color TVs

Sony Semiconductor 

Pin

No.

Symbol

23 R2IN

24 G2IN

25 B2IN

26 SVCC2

27 RSH

29 GSH

31 BSH

CXA2050S

Equivalent circuit

Description

Analog/digital (dual-purpose) RGB signal

inputs.

The input signals are input via capacitors.

100µA When using analog input, input a 0.7Vp-p

200

signal (no sync, 100 IRE); when using

23

digital input, input a signal of at least

24

1.5Vp-p (Vth = 1.2V).

The display level is 78 IRE. When using

25

digital input, digital input is selected

30k

regardless of the YS2 setting.

In addition, the VM output is turned off.

These pins are clamped to 5.7V at the

burst timing of the signal input to the

HSIN input (Pin 53).

Power supply for RGB block.

200

Sample-and-hold for R, G and B AKB.

27

Connect to GND via a capacitor.

When not using AKB (manual CUTOFF

29

mode), R, G and B cut-off voltage can be

31

controlled by applying a control voltage to

each pin. The control voltage is 4.5 ± 1V.

28 ROUT

30 GOUT

32 BOUT

33 IKIN

200

28

R, G and B signal outputs.

2.5Vp-p is output during 100% white

30

32

12k

input.

1.1mA

Input the signal converted from the CRT

beam current (cathode current Ik) to a

voltage via a capacitor. The V blanking

part is clamped to 2.7V at the V retrace

1k

timing.

The input for this pin is the reference

33

pulse return, and the loop operates so

50µA

that the Rch is 1Vp-p and the G and Bch

are 0.81Vp-p. The G and Bch can be

varied by ±0.5V by the bus CUTOFF

control. When not using AKB, this pin

should be open.

–7–

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