NJU7181

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Version 5.1E

APPLICATION NOTE

•

DC Output Waveform Scenario

Scenario 1:

Power-ON

– Output will be high initially when NJU7181 is first powered up even if there is no input signal detected.

Power

DC Output

(NJU7181)

LOW

LOW

High

No Input Signal detected

Power On

POWERONwith no signal detected

Trigger

No Signal detected (Low)

Audio Signal Input

– Output will be or maintain high when either an input signal or trigger signal is detected. The

delay circuit will only be activated when both signals is not present. NJU7181 will then hold the

output level for a delay time which can be adjusted by the Capacitor value @ pin 5.

Power

LOW

LOW

High

Power On

Audio signal present

Trigger

No Signal detected (Low)

Signal Detected

Audio Signal Input