Calibration method and device for intelligent audio power amplifier

Abstract

The invention discloses a smart audio power amplifier calibration device. The device comprises a reset detection module, which is used for detecting whether a calibration identification bit of a smart audio power amplifier in a mobile terminal is in a reset state; a temperature detection module, which is used for detecting whether the current temperature of the mobile terminal is larger than a preset temperature threshold value when the calibration identification bit is in the reset state; and a calibration control module, which is used for starting a calibration function of the smart audio power amplifier for calibration when the current temperature of the mobile terminal is smaller than the preset temperature threshold value. The invention also discloses a smart audio power amplifier calibration method. The smart audio power amplifier calibration method and device prevent the smart audio power amplifier from being calibrated when the temperature is over high, thereby reducing probability of calibration abnormity of the smart audio power amplifier due to influence of the temperature.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and device for calibrating an intelligent audio power amplifier. Background technique [0002] With the increasing development of science and technology, mobile terminals have become the most popular electronic devices used by users, and the mobile terminals have more and more functions, and the competition in the industry is becoming more and more fierce. In order to meet the various needs of various end users, avoid homogeneous competition, and form differentiated advantages, various terminal manufacturers are constantly trying to use new technologies and new devices and other black technologies, such as audio function-related HIFI sound effects and The introduction of intelligent audio power amplifier devices. Smart audio power amplifiers can effectively improve the sound loudness and sound effects of mobile terminals. Almost without exception, flagship ...

AI Technical Summary

Problems solved by technology

[0003] However, the manufacturing process and algorithm of intelligent audio power amplifier devices are relatively complicated. The initialization process, especially the calibration process for speaker impedance, is sensitive to the temperature of the environment and the device itself (generally not exceeding 40 degrees Celsius). It meets the requirements, and it is easy to appear that although the initial calibration passes, it cannot work normally

Specifically, in order to be able to measure the temperature of the induction coil of the speaker, the smart audio power amplifier needs to know the precise value of the speaker impedance. Therefore, when the smart audio power amplifier is first started, a calibration process needs to be performed, and the speaker enhancement algorithm used by the smart audio power amplifier is based on The impedance value of the speaker at the standard temperature (generally 25 degrees Celsius) can be used as the reference input of the algorithm to work normally, and usually the speaker enhancement protection algorithm estimates the speaker impedance value at the standard temperature by calculating the instantaneous impedance value of the speaker at the current ambient temperature , the ambient temperature range for speaker impedance calibration is generally 15 degrees Celsius to 40 degrees Celsius. If there is a deviation in the calibration of the reference impedance value, it may appear that although the initialization calibration is passed, it cannot work normally.

At the same time, due to the large-capacity battery power supply of mobile terminals and the application of fast charging technology, the temperature rise of mobile terminals can easily exceed 40 degrees Celsius in many scenarios, which further magnifies the probability of errors in the calibration of smart audio power amplifiers

When the calibration is abnormal, the problem of the mobile terminal is generally that the external sound is small, it is almost inaudible in a noisy environment, or the external sound is suddenly loud and small, or there is a certain probability that the external sound is silent, or there is a certain probability that the call is silent, etc. Serious problems, such problems are generally subjective and uncertain, so neither the test nor the production process can be fully controlled, especially the assembly line of terminal mass production, due to the noisy environment and numerous processes, relying on subjective control Mechanism, it is easy for some problematic prototypes to flow out of the market, causing after-sales complaints from users, or even withdrawing the machine, which will affect the reputation of the terminal product and reduce the reputation of the brand terminal

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