Output power adjusting device and method of mobile terminal

Abstract

The invention discloses an output power adjusting device and method of a mobile terminal. The device comprises a baseband chip, a detecting module and an earphone amplifier. The baseband chip controls the work state of the detecting module according to the plug state of an earphone. When the earphone is plugged in, the detecting module outputs corresponding feedback voltages to the baseband chip according to earphone impedance. The baseband chip adjusts the gain of the earphone amplifier according to the feedback voltages to adjust the output power of the mobile terminal. Thus, the output power of the mobile terminal can be automatically adjusted according to the impedance of the earphone plugged in so as to guarantee that volumes output by earphones are the same under the condition that earphones with different impedances are connected. The problems that existing default loads are different from the load of the earphone plugged in, but output voltages are fixed, and consequently, the volume output by the earphone is too large or too small are solved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an output power adjustment device and method of a mobile terminal. Background technique [0002] In mobile terminals, the commonly used earphone impedance is 32 ohms. Existing manufacturers usually tune and set the output power for an impedance of 32 ohms. When the mobile terminal is connected to headphones with other impedances, because the load of the connected headphones is different from the default load (32 ohms), but the output voltage is fixed, the output volume of the headphones is too large or too small, which affects the audio listening effect. [0003] In view of this, the present invention provides a device for adjusting output power of a mobile terminal and a method thereof. Contents of the invention [0004] In view of the deficiencies of the prior art above, the purpose of the present invention is to provide an output power adjustment device and method f...

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Problems solved by technology

[0004] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide an output power adjustment device and method for a mobile terminal to solve the problem that the existing default load is different from the load of the inserted earphone, but the fixed output voltage causes the output of the earphone. Loud or soft volume issues

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