Sound channel detection circuit

Details Sound channel detection circuit Sound channel detection circuit

2008-03-21

2011-11-01

Tran, Minh-Loan T (Department: 2826)

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

C381S059000, C381S077000, C381S306000

Reexamination Certificate

active

08050416

ABSTRACT:
A sound channel detection circuit includes a amplifier circuit and a LED. The amplifier circuit has an input connected to a connector for receiving an AC voltage signal and an output. The LED has an anode connected to the output of the amplifier circuit and a cathode connected to ground, when a sound channel circuit to be tested works normally, the AC voltage is amplified by the amplifier circuit and drives the LED to flash, when the sound channel circuit to be tested is not working, the LED doesn't emit light. The sound channel detection circuit with the amplifier circuit and the LED can improve the accuracy and efficiency of detection in a situation of a batch production in a noisy environment.

REFERENCES:
patent: 6370252 (2002-04-01), Lunter
patent: 2009/0086985 (2009-04-01), Zhang et al.
patent: 85108672 (1986-07-01), None

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