CN-121985247-A - Signal noise reduction and power supply optimization method for earphone internal circuit

CN121985247ACN 121985247 ACN121985247 ACN 121985247ACN-121985247-A

Abstract

The invention discloses a signal noise reduction and power supply optimization method for an earphone internal circuit, which comprises the core steps of acquiring real-time power supply voltage, real-time interference signal frequency, real-time circuit temperature and real-time load resistance based on synchronous acquisition time sequence control logic, correcting a reference noise reduction coefficient based on the parameter coupling effect to obtain a dynamic noise reduction coefficient, adjusting the reference power supply current based on the dynamic noise reduction coefficient and the real-time load resistance to obtain self-adaptive power supply current, and calculating noise reduction-power supply comprehensive performance index based on the dynamic noise reduction coefficient and the self-adaptive power supply efficiency. According to the method, through synchronous acquisition and multi-parameter coupling linkage adjustment, the core problem of independent optimization of noise reduction and power supply in the prior art is solved, cooperative adaptation of noise reduction and power supply is realized, and the running stability of an earphone circuit is improved.

Inventors

YUE ZHILIANG

Assignees

深圳市猎声电子科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (10)

1. The signal noise reduction and power supply optimization method for the earphone internal circuit is characterized by comprising the following steps of: s1, acquiring real-time power supply voltage, real-time interference signal frequency, real-time circuit temperature and real-time load resistance of an internal circuit of an earphone based on synchronous acquisition time sequence control logic; S2, correcting a reference noise reduction coefficient based on the coupling effect of the real-time power supply voltage, the real-time interference signal frequency and the real-time circuit temperature to obtain a dynamic noise reduction coefficient; S3, adjusting a reference power supply current based on the dynamic noise reduction coefficient and the real-time load resistor to obtain a self-adaptive power supply current; And S4, calculating a noise reduction-power supply comprehensive performance index based on the dynamic noise reduction coefficient and the power supply efficiency corresponding to the self-adaptive power supply.
2. The method for optimizing signal noise reduction and power supply of the earphone internal circuit according to claim 1, wherein the synchronous acquisition time sequence control logic in the step S1 is characterized in that acquisition trigger time stamps of a voltage acquisition unit, a frequency acquisition unit, a temperature acquisition unit and a resistance acquisition unit are set, the acquisition units trigger acquisition actions at the same time stamp, and data are transmitted to a main control unit after acquisition is completed.
3. The method for noise reduction and power supply optimization of the signal of the earphone internal circuit according to claim 1 is characterized in that in the step S2, the reference noise reduction coefficient is corrected based on the coupling action of the real-time power supply voltage, the real-time interference signal frequency and the real-time circuit temperature to obtain the dynamic noise reduction coefficient, specifically, the rated power supply voltage, the reference interference signal frequency, the reference circuit temperature, the voltage sensitivity coefficient, the frequency sensitivity coefficient and the temperature sensitivity coefficient are set, the power supply voltage correction factor is obtained by combining the ratio relation of the real-time power supply voltage and the rated power supply voltage with the voltage sensitivity coefficient, the interference frequency correction factor is obtained by combining the ratio relation of the real-time interference signal frequency and the reference interference signal frequency with the frequency sensitivity coefficient, the circuit temperature correction factor is obtained by combining the difference relation of the real-time circuit temperature and the reference circuit temperature, and the dynamic noise reduction coefficient is obtained by the product operation of the power supply voltage correction factor, the interference frequency correction factor and the reference noise reduction coefficient.
4. The method for noise reduction and power supply optimization of signals of an earphone internal circuit according to claim 1, wherein in step S3, the reference power supply current is adjusted based on the dynamic noise reduction coefficient and the real-time load resistor to obtain the self-adaptive power supply current, specifically, the reference load resistor and the load sensitivity coefficient are set, the load correction factor is obtained by combining the ratio relation of the real-time load resistor and the reference load resistor with the load sensitivity coefficient, and the self-adaptive power supply current is obtained by the product operation of the ratio relation of the dynamic noise reduction coefficient and the reference noise reduction coefficient, the load correction factor and the reference power supply current.
5. The method for optimizing signal noise reduction and power supply of an earphone internal circuit according to claim 3, wherein the dynamic noise reduction coefficient is calculated by a dynamic noise reduction coefficient correction formula, and the dynamic noise reduction coefficient correction formula is associated with a power supply voltage correction factor, an interference frequency correction factor, a circuit temperature correction factor and a reference noise reduction coefficient, so that the dynamic noise reduction coefficient correction under multi-parameter coupling is realized.
6. The method for signal noise reduction and power supply optimization of an earphone internal circuit according to claim 4, wherein the adaptive power supply current is calculated by a power supply current adaptive adjustment formula, and the power supply current adaptive adjustment formula is used for associating a ratio relation between a dynamic noise reduction coefficient and a reference noise reduction coefficient, a load correction factor and a reference power supply current to realize power supply current adaptive adjustment based on noise reduction requirements.
7. The method for signal noise reduction and power supply optimization of an earphone internal circuit according to claim 1, wherein the noise reduction-power supply comprehensive performance index is calculated by a noise reduction-power supply comprehensive performance quantization formula, and the noise reduction-power supply comprehensive performance quantization formula correlates a ratio of a dynamic noise reduction coefficient to an adaptive power supply efficiency to a reference power supply efficiency, so as to realize cooperative quantization of noise reduction effect and power supply efficiency.
8. The method for optimizing signal noise reduction and power supply of the earphone internal circuit according to claim 5 is characterized in that the values of the voltage sensitivity coefficient, the frequency sensitivity coefficient and the temperature sensitivity coefficient are obtained through experimental calibration, and the specific calibration mode is that under the combined working conditions of different power supply voltages, different interference signal frequencies and different circuit temperatures, corresponding noise reduction coefficient variation is obtained through testing, and the calibration values of the voltage sensitivity coefficient, the frequency sensitivity coefficient and the temperature sensitivity coefficient are determined based on the ratio relation between the noise reduction coefficient variation and the power supply voltage variation rate, the interference signal frequency variation rate and the circuit temperature variation value.
9. The method for noise reduction and power supply optimization of the internal circuit of the earphone according to claim 6 is characterized in that the value of the load sensitivity coefficient is obtained through experimental calibration, and the specific calibration mode is that under the working conditions of different load resistors, the corresponding power supply current adjustment quantity is obtained through testing, and the calibration value of the load sensitivity coefficient is determined based on the ratio relation between the power supply current adjustment quantity and the load resistance change rate.
10. The method for optimizing noise reduction and power supply of signals of an earphone internal circuit according to claim 1, further comprising the step S5 of comparing the noise reduction-power supply comprehensive performance index with a preset performance threshold, and if the noise reduction-power supply comprehensive performance index does not reach the preset performance threshold, adjusting values of a voltage sensitivity coefficient, a frequency sensitivity coefficient, a temperature sensitivity coefficient and a load sensitivity coefficient, and repeatedly executing the steps S2 to S4 until the noise reduction-power supply comprehensive performance index reaches the preset performance threshold, wherein the preset performance threshold is determined through experimental calibration.

Description

Signal noise reduction and power supply optimization method for earphone internal circuit Technical Field The invention relates to the technical field of earphone electronic circuits, in particular to a signal noise reduction and power supply optimization method for an earphone internal circuit. Background In the existing earphone internal circuit design, the noise reduction module and the power supply module mostly adopt independent control logic, the noise reduction coefficient is a fixed set value, and the power supply current is matched only according to the fixed load requirement. When the earphone is in low-power, strong interference or temperature fluctuation and other complex working conditions, the fixed noise reduction coefficient cannot be adapted to the performance attenuation of the noise reduction module caused by power supply voltage fluctuation, and meanwhile, the fixed power supply current cannot be matched with the load change after the noise reduction coefficient is adjusted, so that the noise reduction effect is suddenly reduced or the power supply redundancy loss is increased. The problem is caused by the fact that a linkage optimization mechanism for noise reduction and power supply is not established in the prior art, and cooperative adaptation under multiple working conditions cannot be achieved, so that the problem becomes a key bottleneck for influencing the running stability of the earphone under complex working conditions. Based on the above-mentioned problems, a technical solution for realizing the collaborative optimization of noise reduction and power supply is needed. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a signal noise reduction and power supply optimization method for an internal circuit of an earphone, which comprises the following steps: s1, acquiring real-time power supply voltage, real-time interference signal frequency, real-time circuit temperature and real-time load resistance of an internal circuit of an earphone based on synchronous acquisition time sequence control logic; S2, correcting a reference noise reduction coefficient based on the coupling effect of the real-time power supply voltage, the real-time interference signal frequency and the real-time circuit temperature to obtain a dynamic noise reduction coefficient; S3, adjusting a reference power supply current based on the dynamic noise reduction coefficient and the real-time load resistor to obtain a self-adaptive power supply current; And S4, calculating a noise reduction-power supply comprehensive performance index based on the dynamic noise reduction coefficient and the power supply efficiency corresponding to the self-adaptive power supply. Preferably, the synchronous acquisition time sequence control logic in the step S1 specifically sets acquisition trigger time stamps of a voltage acquisition unit, a frequency acquisition unit, a temperature acquisition unit and a resistance acquisition unit, and each acquisition unit triggers an acquisition action at the same time stamp and transmits data to a main control unit after the acquisition is completed. Further preferably, in the step S2, the reference noise reduction coefficient is corrected based on the coupling action of the real-time power supply voltage, the real-time interference signal frequency and the real-time circuit temperature to obtain the dynamic noise reduction coefficient, specifically, the rated power supply voltage, the reference interference signal frequency, the reference circuit temperature, the voltage sensitivity coefficient, the frequency sensitivity coefficient and the temperature sensitivity coefficient are set, the power supply voltage correction factor is obtained by combining the voltage sensitivity coefficient with the ratio relation of the real-time power supply voltage and the rated power supply voltage, the interference frequency correction factor is obtained by combining the frequency sensitivity coefficient with the ratio relation of the real-time interference signal frequency and the reference interference signal frequency, the circuit temperature correction factor is obtained by combining the temperature sensitivity coefficient with the difference relation of the real-time circuit temperature and the reference circuit temperature, and the dynamic noise reduction coefficient is obtained by multiplying the power supply voltage correction factor, the interference frequency correction factor, the circuit temperature correction factor and the reference noise reduction coefficient. Further preferably, in the step S3, the self-adaptive power supply current is obtained by adjusting the reference power supply current based on the dynamic noise reduction coefficient and the real-time load resistor, specifically, the self-adaptive power supply current is obtained by setting the reference load resistor and the load sensitivity coefficient, obtaining the load correction fact