Method and apparatus for indicating speaker faults

Details Method and apparatus for indicating speaker faults Method and apparatus for indicating speaker faults

1997-10-06

1999-08-17

Lee, Ping

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

381 86, 4552264, H04R 2900

Patent

active

059405180

ABSTRACT:
In an automotive radio system an amplifier is capable of detecting speaker faults. A fault signal from the amplifier is received by a microprocessor which sends a fault message to a radio display and/or stores fault data which can be accessed via a serial data link by a diagnostic tool. One embodiment of the amplifier has an output pin for outputting distortion signal, and that pin is used when distortion is not likely to also output a fault signal which reveals the presence of a fault. Another embodiment of the amplifier has a data storage register which receives data on the type of fault and the affected channel, and a data bus to send the data to the microprocessor.

REFERENCES:
patent: 5361305 (1994-11-01), Easley et al.
patent: 5450624 (1995-09-01), Porambo et al.

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