一种报警电路及应用该报警电路的电子设备，该报警电路包括一音频界面、一音频处理器、一发声单元及一控制单元，该控制单元的第一端与该音频界面相连，以接收一第一控制信号或一第二控制信号；该控制单元的第二端接收一报警打开信号；该控制单元的第三端与音频处理器相连，当该控制单元的第二端接收该报警打开信号，且该控制单元的第一端接收该第一控制信号时，该控制单元将该报警打开信号透过该第三端传递至该音频处理器，该音频处理器透过该发声单元发出该报警信号。

An alarm circuit applied in an electronic device includes an audio interface, an audio processor, a speaker, and a control unit. A first terminal of the control unit is coupled to the audio interface, to receive a first control signal or a second control signal. A second terminal of the control unit receives an alarm signal. A third terminal of the control unit is coupled to the audio processor. When the second terminal of the control unit receives the alarm signal, and the first terminal of control unit receives the first control signal in meanwhile, the alarm signal is controlled to transmit to the alarm processor through the third terminal of the control unit, and is output and amplified by the speaker.