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●Description of operations

BA7657S/F

1) Analog SW block

Two channels of RGB signals can be switched.

I/O relations

IN1 can be selected when high-level voltage is applied to

the CTL pin, and IN2 can be selected when low level

voltage is applied.

2) Digital SW block

synchronization signals.

HD and VD synchronization signals are output for IN1 when

high-level voltage is applied to the CTL pin, and these signals

are output for IN2 when a low-level voltage is applied to the

CTL pin.

3) Synchronization signal separation block

This block separates composite signals (Sync on Green) and synchronization signals and outputs positive-electrode

composite synchronization signals.

separation circuit. A low-level output voltage is used for output.

The time at which the synchronization signal separation circuit will be stopped can be set using external time constants

for the circuit detection pin.

●Application circuit

BA7657S/F

Fig.2

Input

Output

HD

VD

Sync on Green

HD

VD

Composite Sync

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