118 results about "Audio power" patented technology

The invention provides an intelligent audio power amplifier system and a working method thereof. The working method comprises the steps that a dynamic noise suppression module enables an input signal after reverse noise injection to enter a distortion compensation module; a distortion compensation signal is synthesized by using a distortion compensation module; the life cycle parameter self-calibration module calibrates parameters and inputs the parameters to the dynamic noise suppression module and the distortion compensation module; the dynamic noise suppression module is based on an intelligent learning method and adopts a frequency band channel network, a time sequence channel network and a fusion layer; the life cycle parameter self-calibration module provides the temperature and the working time for the dynamic noise suppression module to optimize the time domain channel network and provides the temperature and the working time for the distortion compensation module to update the predistortion coefficient of the dynamic nonlinear distortion model; the output of the dynamic noise suppression module is provided for the distortion compensation module; and the output of the distortion compensation module is fed back to the dynamic noise suppression module. The problems of high-frequency noise interference, nonlinear distortion degradation and insufficient long-term stability are solved at the same time.

In a wireless stereo system including first and second battery-powered speakers, if low power is sensed in the second speaker, the user may be given the option of shifting the first speaker to mono mode, or maintain the first speaker in stereo mode, playing its assigned channel, or alter a left / right stereo balance between the speakers. Speaker setting may also change depending on whether a speaker is on or off a charging dock.

The invention discloses an overload protection method for an audio power amplifier, and relates to the field of audio power amplifiers. According to the invention, the instantaneous output amplitude signal of the power amplifier is divided by the preset overload threshold impedance to obtain the reference current dynamically changing along with the signal, and the actual output current is compared with the reference current in real time, so that the protection criterion is converted from a fixed current threshold to an adaptive impedance threshold; therefore, real-time identification and turn-off of a low-impedance abnormal load are realized, and normal output of a high-peak-factor audio signal is compatible.

The application discloses a kind of vehicle terminal audio direct output and external power amplifier switching control device, comprising: one multiplexing analog high-definition television audio switch U1, two multiplexing analog high-definition television audio switch U3, one audio power amplifier U2, two audio power amplifier U4, 4-way operational amplifier U5, one audio switch K1, two audio switch K2 and control chip;It is also disclosed that corresponding method is configured to write configuration word into vehicle terminal according to vehicle configuration;Read the configuration word written in vehicle terminal;According to configuration word, the flow of audio signal is transferred between the different pins of U1, U2, U3, U4 and U5, and the switching switch of audio is selected;In the early stage of design, this scheme does not increase additional cost, and is economically feasible;It will not cause re-determination of the existence of external power amplifier every time when starting due to CAN bus loss;It reduces the risk of burning loudspeaker and improves user experience.

The application relates to the field of electronic technology, in particular to a loudspeaker voice coil temperature control method and device, electronic equipment and a storage medium. The voice coil temperature control method comprises the following steps: acquiring a first audio power of a loudspeaker, and a predicted temperature corresponding to the first audio power; acquiring a real-time measured temperature of the loudspeaker at a current moment; fusing the predicted temperature and the real-time measured temperature, inputting a fused temperature value into a temperature feedback processing model, and obtaining an output reference temperature; acquiring a preset maximum set temperature and a power prediction model, inputting the reference temperature and the maximum set temperature value into the power prediction model, obtaining an output target power, and obtaining a control gain value according to the first audio power and the target power; and adjusting a power value of a second audio signal of the loudspeaker at a next moment by using the control gain value, so that the temperature of the loudspeaker voice coil is stabilized below the maximum set temperature, and the sound quality of the loudspeaker voice coil is prevented from being affected by excessively high temperature.

The invention discloses a parameter adjustment method and electronic equipment, and belongs to the technical field of electronic equipment. The method comprises the following steps: driving a loudspeaker to play audio according to parameter configuration of an audio power amplifier; the parameter configuration is set as a calibration driving parameter; detecting an amplitude characterization value corresponding to the played audio in the audio playing process, and taking the amplitude characterization value as a target characterization value; if a deviation value between the target characterization value and the calibration characterization value exceeds a preset threshold value, adjusting a default driving parameter based on the target characterization value and the calibration characterization value, and setting the parameter configuration as the adjusted default driving parameter to reduce the deviation value; the calibration characterization value is an amplitude characterization value detected when the loudspeaker is driven to perform audio playing according to the calibration driving parameter in a standard environment.

The present invention discloses an audio power adjustment method, device, and system based on Power over Ethernet. The method adjusts the input current and output power of a step-down circuit with synchronous rectification by obtaining the type parameters of a self-powered device, collects the peak power required by the power supply switch circuit, and compares it with the effective power supply power of the power supply device. When it is determined that the required power is greater than the power supply power, the supercapacitor is adjusted to a power supply state so that it and the step-down circuit with synchronous rectification can simultaneously power the power supply circuit. The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage of the power supply switch circuit, and the corresponding audio power signal is output through the adjusted audio power amplifier. The input current and output power of the step-down circuit with synchronous rectification are adjusted according to the type parameters of the power supply device, thereby improving the adaptability and compatibility of the system with different types of power supply devices. The power supply switch circuit is supplied with high power by the supercapacitor, realizing power amplification through POE standard technology.

An audio power amplifier (1) defining a plurality of characteristics relating to the corresponding capabilities and functions of the audio amplifier (1) itself comprises a control unit (18) comprising instructions, where the instructions comprise setting parameters. The control unit (18) is programmed to: set a characteristic of a plurality of characteristics according to a set parameter value; digital information representing updated values of the plurality of setting parameters is received, and settings of the plurality of characteristics are updated according to the updated values.

1. Name of the product in this design: Power Amplifier. 2. Purpose of this design: To amplify audio power signals. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention relates to the technical field of audio amplifiers, in particular to an audio amplifier circuit safety protection method and system.The circuit safety protection method and system comprise the steps that an audio input source and system power-on are included, and after the audio input source receives audio, the audio is transmitted to an audio power amplification module; the audio power amplification module amplifies the audio power and then the audio power passes through the over-current detection module. According to the audio amplifier circuit safety protection method and system, an integrated and intelligent audio amplifier safety protection solution is provided, and compared with a traditional scheme only adopting a disposable fuse, the audio amplifier circuit safety protection method and system have the double functions of over-temperature protection and over-current protection, can cope with more comprehensive fault scenes, are more comprehensive in protection, and are more reliable in protection. An electronic circuit is adopted for real-time monitoring, the response speed reaches the millisecond level and is far higher than that of a traditional fuse, faults can be cut off rapidly, and expensive core power devices are prevented from being burnt out fundamentally.

This application discloses an electronic device, a near-field communication control method, and an apparatus, belonging to the field of near-field communication technology. The electronic device includes: an audio power amplifier; a near-field communication module for interacting with an external near-field communication device; an object proximity detection sensor connected to the near-field communication module, used to detect the proximity status of the near-field communication device and report a moving-away or moving-closer status; and a main control module connected to the audio power amplifier, the near-field communication module, and the object proximity detection sensor, used to control the operating parameters of the near-field communication module based on the operating status of the audio power amplifier and the proximity status reported by the object proximity detection sensor.

The present disclosure provides an audio system. The audio system includes: a target audio signal generator module including a plurality of target audio signal generators, configured to receive an audio signal and a tracking signal and generate a plurality of target audio signals based on the audio signal and tracking signal; a tracking power supply circuit module including a plurality of tracking power supply circuits, configured to receive the plurality of target audio signals and generate a plurality of power supply voltages based on the plurality of target audio signals; an audio power amplifying circuit module including a plurality of audio amplifying circuits, configured to receive the plurality of target audio signals and the plurality of power supply voltages, and amplify the plurality of target audio signals; wherein each of the plurality of tracking power supply circuits provides a corresponding power supply voltage for each of the plurality of audio amplifying circuits.

The utility model relates to an audio conversion testing device for a vehicle-mounted entertainment information system, which comprises a circuit board, a straight pin seat, an audio single-ended signal interface and an audio power amplification chip are mounted on the circuit board, and the straight pin seat is electrically connected with a UVP pin, a VDD pin, a GND pin and a VSS pin of the audio power amplification chip through a power supply circuit. The straight needle seat is connected with a + INR pin and a-INR pin of the audio power amplification chip through the right audio differential input circuit, the straight needle seat is connected with a + INL pin and a-INL pin of the audio power amplification chip through the left audio differential input circuit, and the audio single-ended signal interface is connected with an OUTR pin and an OUTL pin of the audio power amplification chip. The right audio differential input circuit and the left audio differential input circuit import differential audio signals into the audio power amplification chip, the differential audio signals are processed into single-end signals, the audio single-end signal interface is connected with an audio interface of a computer through an audio data line, and the processed single-end signals are reported to the computer to be tested.

The utility model discloses a vehicle-mounted audio system based on a TBOX emergency call function, and the system comprises a vehicle-mounted information entertainment system module which is provided with a central logic control unit, an A2B main controller, a first A2B bus physical switch, and a second A2B bus physical switch; the audio power amplifier module is provided with an AMP MCU and a mute driving module, and the AMP MCU receives a mute instruction from the vehicle-mounted communication terminal module through a CAN bus and / or a hard wire; and the vehicle-mounted communication terminal module is provided with a cellular communication module and a microphone module and can send an emergency trigger signal to the vehicle-mounted information entertainment system module through a hard wire. In an emergency mode, the vehicle-mounted information entertainment system module can disconnect an A2B link, the vehicle-mounted communication terminal module establishes an emergency call and actively commands the audio power amplifier module to be mute through a redundant path, and it is ensured that the call at a driving position is clear. And through multiple isolation and redundancy control, the audio quality of emergency calls and the reliability of the system are effectively guaranteed when the system fails.

1. The name of the design product: Internet of Things digital audio power amplifier. 2. The use of the design product: for power amplification of audio signals. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a co-processing system of an audio power amplifier. The co-processing system comprises an input module, an output module, at least one co-processing module, a main processing module, an input audio bus, an output audio bus and a control data bus. Wherein the co-processing module is used for assisting the corresponding input module or the main processing module or the output module to work. And the main processing module is used for dynamically managing the co-processing module to access the system or break away from the system, and scheduling the work of each module of the system by using the control data bus. And the input module, the output module, the co-processing module and the main processing module communicate by using the input audio bus, the output audio bus and the control data bus. Wherein the input audio bus and the output audio bus are used for transmitting audio data, and the control data bus is used for transmitting control data. According to the invention, the flexibility and expandability of the system are improved, and the integrity and reliability of audio processing are ensured through dynamic management and cooperative operation between the main processing module and the co-processing module.

The invention relates to the technical field of audio processing, discloses a system named as an integrated system of active noise reduction and audio power amplification, and aims to solve the problem of performance restriction caused by coupling between a power amplifier and a noise reduction module in a highly integrated system. The system is characterized in that in a calibration mode, calibration signals are injected into a D-type power amplifier, coupling noise is collected, and a digital transfer function model from the power amplifier to an active noise reduction microphone is established; in a normal working mode, coupling interference is predicted and eliminated in real time according to a power amplifier driving signal by using the model, and pure environmental noise is obtained for active noise reduction. According to the system, the noise reduction performance is remarkably improved, endogenous interference is eliminated, the robustness is enhanced, and collaborative optimization of noise reduction and amplification efficiency is realized.

The utility model provides a portable sound equipment overload protection box and belongs to the technical field of sound equipment. Comprising a protection box body, and a sound equipment overload protection circuit is arranged in the protection box body. The sound equipment overload protection circuit comprises a ship-shaped switch K, a self-recovery fuse PT, an LED 2 lamp, a knob type rheostat Rw, a resistor R1, a resistor R2 and an LED 1 lamp. The input end of the ship-shaped switch K is connected with the audio power amplifier, and the B end of the ship-shaped switch K is directly connected with the input end of the sound equipment through an L1 line; the A end of the ship-shaped switch K is connected with the input end of the sound equipment through a line L2, the self-recovery fuse PT is connected in series to the line L2, and the LED 2 lamp, the knob type rheostat Rw and the resistor R1 are connected in series and then are connected in parallel with the self-recovery fuse PT; the resistor R2 is connected with the LED 1 lamp in series, the resistor R2 is connected with the input end of the self-recovery fuse PT, and the LED 1 lamp is grounded. According to the scheme, reliable overload protection is provided for the sound equipment, and the problems that an existing adjusting equalizer or sound equipment with overload protection is too large in size, complex in process and the like are solved.

The invention discloses an audio power amplifier circuit, an audio power amplifier method and electronic equipment, relates to the field of audio power amplifiers, and can improve the power amplification efficiency of audio signals. The audio power amplifier circuit comprises a main control chip, a voltage regulating chip and an audio power amplifier chip, the main control chip comprises a first output end and a second output end, and the audio power amplifier chip comprises a first input end and a second input end; the first output end of the main control chip is connected with the input end of the voltage regulating chip and is used for outputting a voltage control signal for indicating the amplitude of the audio signal; the output end of the voltage regulating chip is connected with the first input end of the audio power amplifier chip, and the voltage regulating chip is used for regulating the output power supply voltage according to the input voltage control signal; a second output end of the main control chip is connected with a second input end of the audio power amplifier chip and is used for outputting an audio signal; and the audio power amplifier chip adjusts the power for performing power amplification on the audio signal based on the power supply voltage.

The utility model relates to the field of audio power supplies, in particular to a double-transistor flyback topology circuit structure of an audio power supply module, which is characterized by comprising a double-transistor flyback switching circuit and a voltage conversion circuit, and the output end of the double-transistor flyback switching circuit is electrically connected with the input end of the voltage conversion circuit. According to the utility model, the output power and efficiency are improved, the peak voltage and the peak current can be effectively controlled, the ripples at the output end can be reduced, and the circuit is especially suitable for equipment sensitive to the ripples.

An audio power amplifier circuit and a duty cycle modulation circuit and a noise suppression circuit thereof are disclosed. The audio power amplification circuit includes an integral amplifier module and a high frequency switch The duty cycle modulation circuit is used to adjusts a gain of the audio power amplifier circuit by controlling a duty cycle of the high frequency switch. The duty cycle modulation circuit counts pulses of a duty cycle modulation signal to obtain a first count value counts pulses of a clock signal to obtain a second counting value and performs a logical operation according to the first count value, the second count value, and the clock signal to obtain a switch modulation signal for controlling the high frequency switch. The “pop” noise is weakened by controlling the gain of the audio power amplifier circuit, and the cost is reduced while meeting the high linearity of the circuit.

A driving circuit for an audio power amplifier and an electronic device are provided. The driving circuit includes an audio codec, an audio power amplifier (PA), a power management integrated circuit (PMIC), a transistor, a speaker, and a motor. The transistor is connected in series with the motor to form a combined body, the speaker is connected in parallel with the combined body to form a two-in-one device, the audio PA is connected in series with the two-in-one device, the PMIC is connected in series with the two-in-one device, and the audio codec is connected in series with the audio PA. In the technical solutions provided in embodiments of the disclosure, a power amplifier can drive both the motor and the speaker, so that a power amplifier may be omitted and the power consumption and cost of the electronic equipment may be reduced.

1. The name of the design product: front stage audio power amplifier. 2. The use of the design product: for amplifying audio signals to provide sufficient power to drive the speaker to sound. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. The bottom of the design product is not easy to see or not visible when used, omit the top view.

The invention provides a triangular wave generation circuit, a D-type audio power amplifier, a chip and electronic equipment, and relates to the technical field of electronic circuits. The circuit comprises a logic generation circuit, an overvoltage detection circuit and a triangular wave generation sub-circuit, the logic generation circuit generates a triangular wave reference clock signal according to an external clock signal, and generates a first switching reference signal when the bridge switching signal generates a first switching action; the overvoltage detection circuit switches a triangular wave amplitude threshold according to the first switching reference signal, and sends an overvoltage indication signal to the logic generation circuit when determining that the triangular wave signal is overvoltage based on the threshold, so that the logic generation circuit outputs a triangular wave switching signal to the triangular wave generation sub-circuit; and when the triangular wave generation sub-circuit receives the triangular wave switching signal, the voltage of the triangular wave signal is frozen under the control of the triangular wave reference clock signal until the direction is changed when the next trigger edge of the external clock signal arrives. According to the invention, smooth switching of triangular waves can be realized.

The utility model provides a driving system for an automobile music seat, and belongs to the technical field of audio driving. The driving system for the automobile music seat comprises a voltage reduction module, an analog-to-digital conversion module, an MCU module, a signal coupling module, an audio power amplifier, an impedance matching module, a power supply filtering module and an output module, the input end of the step-down module is used for receiving music power amplifier signals, and the output end of the step-down module is connected with the input end of the analog-to-digital conversion module; the input end of the MCU module is connected with the output end of the analog-to-digital conversion module; the output end of the MCU module is connected with the signal coupling module; the audio power amplifier is respectively connected with the output end of the signal coupling module, the impedance matching module, the power supply filtering module and the output module; and the output module is used for outputting an audio driving signal to drive the automobile music seat. The driving accuracy and reliability of the automobile music seat can be improved.

The utility model discloses a head-mounted Bluetooth earphone supporting a bass enhancement loudspeaker, which is characterized in that a microphone interface of the Bluetooth earphone is connected with an audio input interface of a Bluetooth module, a first audio power amplifier module is connected with an audio output interface of the Bluetooth module, and a first loudspeaker is connected with an audio output end of the first audio power amplifier module; the low-pass filter module is connected with the audio output interface of the Bluetooth module, the second audio power amplifier module is connected with the output end of the low-pass filter module, the second loudspeaker is connected with the audio output end of the second audio power amplifier module, and the power supply module is used for supplying power. According to the utility model, besides the full-band loudspeaker, the bass enhancement vibration loudspeaker is additionally arranged, so that the bass effect of the head-mounted Bluetooth earphone is enhanced, the low-pass filter is also arranged in the circuit to obtain low-frequency audio signals, and then the bass enhancement loudspeaker is driven to produce sound through the audio power amplifier.

The utility model relates to a wireless explaining device, in particular to a wireless voice explaining device, which comprises a transmitting part and a receiving part, and each of the transmitting part and the receiving part comprises an MCU (Microprogrammed Control Unit), a wireless module, an MIC (Microphone) voice processing module, a Bluetooth module, an audio power amplifier, a key input module and a battery charging module, the transmitting part further comprises an audio coding and decoding module and an LCD display screen. According to the utility model, the 433MHz wireless module is integrated, so that long-distance wireless voice transmission is realized, excellent anti-interference performance is achieved, battery endurance is remarkably improved, the size of the explainer is smaller, the explainer is convenient to carry, meanwhile, the limitation of a traditional explainer in the anti-interference aspect is overcome, the explaining range is expanded, and long-distance transmission is supported.

A system and a procedure for validating the output of an audio message in a vehicle interior are provided. An audio safety modulator modulates the audio message using audio frequencies as carrier frequencies, an additional modulation carrier, and modulation data. An audio generator outputs a speaker tone corresponding to the modulated audio message using one or more speakers in the vehicle interior. An audio recorder receives a vehicle sound using one or more microphones in the vehicle interior and outputs a vehicle signal corresponding to the received vehicle sound. An audio safety modulator generates estimated modulation data and estimated audio power from the vehicle signal. Based on this, a validation unit determines whether the output of the audio message is validated.

The embodiment of the invention discloses a dynamic boost circuit for tracking the peak value of an input signal, and the circuit comprises a peak value sampling and holding circuit, a voltage limiting circuit, and a controlled boost circuit, and the peak value sampling and holding circuit is configured to output a first peak voltage according to a plurality of received audio signals. The voltage limiting circuit is connected with the peak value sampling and holding circuit and is configured to adjust the first peak value voltage to a second peak value voltage; the second peak voltage is larger than or equal to the preset first voltage and smaller than or equal to the preset second voltage, and the controlled boost circuit is connected with the voltage limiting circuit and is configured to boost the second peak voltage so as to dynamically track the peak value of the input signal to optimize the working voltage. Therefore, accurately matched working voltage can be provided for the audio power amplifier, energy waste is reduced, audio distortion is avoided, and energy efficiency and sound quality are improved.

This application relates to the field of audio monitoring technology and discloses a speaker monitoring audio power amplifier circuit, including polarized capacitors C66, C131, C138, C115, C116, C67, and C179, resistors R89, R142, R65, R168, R247, R246, R203, and R204, a chip U24, and a connector J8. This application, through a dual-input channel design, provides a solid foundation for subsequent amplification stages, significantly improving the accuracy and clarity of audio monitoring; it ensures the stable operation of the core chip, reducing the risk of audio distortion caused by instability; and the optimized output design filters the amplified signal again, enabling the speaker to more accurately reproduce the audio, providing users with a high-quality monitoring experience. It has high practical value in real-world applications.