Method for locking mobile phone earphone audio output sound volume
A technology of audio output and volume, applied in the direction of telephone communication, advanced technology, electrical components, etc., can solve the problems of uncertain voltage, external electronic equipment cannot work normally, and the output process cannot be stable, etc., and achieve an easy-to-achieve effect
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[0007] A method for locking the audio output volume of the earphone of a mobile phone, the mobile phone includes a software for adjusting the audio output, the software includes a volume setting module and a volume monitoring module, and during initial work, the volume setting module sets the volume target value of the mobile phone , and store this target value as a target value variable, and output a regular sine wave to the headphone jack at the same time. After the regular sine wave reaches the receiving device, it is rectified and filtered by the rectifier and filter circuit to obtain a stable DC voltage; , the volume monitoring module real-time monitors the volume, the output sine wave pattern, frequency and amplitude, and compares the real-time volume value with the stored target value variable, when the volume is changed, the volume monitoring module then This operation is prohibited, and the volume is automatically adjusted to the target value to ensure the stability of...
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