| 摘要 |
Disclosed is a loudspeaker driving signal abnormality detection circuit, comprising: a first detection circuit, a second detection circuit, an electronic switch, and an output circuit; both positive output ends of an amplifier first sound channel and an amplifier second sound channel are connected to the first detection circuit; both negative output ends of the amplifier first sound channel and the amplifier second sound channel are connected to the second detection circuit; a first end of the electronic switch is connected to the first detection circuit and the second detection circuit respectively, and a second end of the electronic switch is connected to the output circuit; when an amplifier voltage signal outputted to the loudspeaker is detected to be higher than a preset voltage value by at least one of the first detection circuit and the second detection circuit, the electronic switch is triggered to control the output circuit to output an abnormal signal. Also disclosed is a loudspeaker protection circuit. The present invention detects an abnormal voltage signal outputted to the loudspeaker, thus avoiding loudspeaker damage due to a higher amplifier output. |
