摘要：【中文】本申请公开了一种数字音频功放和功放环路，该功放环路包括运放U1、电容C1、功放输出级、电阻R1、电阻R2和噪声控制单元，其中：运放U1的反相输入端分别连接到电容C1的一端、所述噪声控制单元的一端以及前级的所述DAC电流源的输出端；运放U1的输出端分别连接到所述功放输出级的控制端和电容C1的另一端；所述功放输出级的输出端依次经过电阻R1、R2接地；所述噪声控制单元的另一端连接到电阻R1与R2的连结点；电阻R1、R2的阻值设置满足R1/R2＝(N‑2)/2，N＞2；运放U1的参考电压等于PVDD/N，PVDD为功放输出级的电源电压；所述噪声控制单元为电阻模块。本申请保证了数字音频功放正常工作。 【EN】The application discloses digital audio power amplifier and power amplifier loop, this power amplifier loop include that the fortune is put U1, electric capacity C1, power amplifier output stage, resistance R1, resistance R2 and noise control unit, wherein: the inverting input end of the operational amplifier U1 is respectively connected to one end of a capacitor C1, one end of the noise control unit and the output end of the DAC current source of the previous stage; the output end of the operational amplifier U1 is respectively connected to the control end of the power amplifier output stage and the other end of the capacitor C1; the output end of the power amplifier output stage is grounded through resistors R1 and R2 in sequence; the other end of the noise control unit is connected to a junction point of the resistors R1 and R2; the resistance values of the resistors R1 and R2 are set to satisfy the conditions that R1/R2 is (N-2)/2, and N is larger than 2; the reference voltage of the operational amplifier U1 is equal to PVDD/N, and PVDD is the power supply voltage of the power amplifier output stage; the noise control unit is a resistance module. The application ensures the normal work of the digital audio power amplifier.

摘要：【中文】本发明提供一种数字音频功放同步电路及方法、电子设备，所述电路包括：控制模块、总线接口模块、锁相环模块、指示信号同步模块和主时钟分频器；所述总线接口模块分别向所述锁相环模块和所述指示信号同步模块发送第一时钟信号；所述锁相环模块完成相位锁定之后，向所述指示信号同步模块发送指示信号；所述指示信号同步模块将所述指示信号同步至所述第一时钟信号之后，得到异步复位信号，并将所述异步复位信号发送至控制模块、总线接口模块以及主时钟分频器，以使各个模块在接收到异步复位信号时进行工作，减小了对音频数据处理的时延，提高输出的音频数据的立体音效的质量。 【EN】The invention provides a digital audio power amplifier synchronization circuit and method, and electronic equipment, wherein the circuit comprises: the device comprises a control module, a bus interface module, a phase-locked loop module, an indication signal synchronization module and a master clock frequency divider; the bus interface module respectively sends a first clock signal to the phase-locked loop module and the indication signal synchronization module; after the phase-locked loop module finishes phase locking, an indication signal is sent to the indication signal synchronization module; the indication signal synchronization module synchronizes the indication signal to the rear of the first clock signal to obtain an asynchronous reset signal, and sends the asynchronous reset signal to the control module, the bus interface module and the main clock frequency divider, so that each module works when receiving the asynchronous reset signal, the time delay of audio data processing is reduced, and the quality of the stereo sound effect of the output audio data is improved.

摘要：【中文】本申请公开了一种数字音频功率放大器及电子设备，其中，所述数字音频功率放大器通过第一辅助电流源和第二辅助电流源在驱动电路工作时为积分器提供拉电流或灌电流，降低了在数字音频功率放大器输出电压较高时，对于积分器内部提供的参考电压的要求，避免了由于积分器内部提供的参考电压与积分器能够支持的最大工作电压相同时，积分器内部的电流源和功放环路驱动模块没有足够的电压余量支持工作的情况出现，使得所述数字音频功率放大器能够在输出电压较高时，仍然能够正常工作，为实现音频功率放大器输出更高功率奠定了基础，以使得音频功率放大器能够获得更大的音量和较好的音质。 【EN】The application discloses a digital audio power amplifier and an electronic device, wherein the digital audio power amplifier supplies source current or sink current to an integrator when a driving circuit works through a first auxiliary current source and a second auxiliary current source, so that when the output voltage of the digital audio power amplifier is higher, the requirement for the reference voltage provided internally by the integrator avoids that, since the reference voltage provided internally by the integrator is the same as the maximum operating voltage that the integrator can support, situations arise where the current source and the power amplifier loop driver module inside the integrator do not have sufficient voltage headroom to support operation, the digital audio power amplifier can still work normally when the output voltage is higher, and a foundation is laid for realizing higher power output of the audio power amplifier, so that the audio power amplifier can obtain higher volume and better tone quality.

摘要：【中文】本发明提供一种供电输入箝位电路及芯片，供电模块包括第一电源和第二电源，箝位模块分别对第一电源提供的第一电压和第二电源提供的第二电压进行箝位，将箝位后的箝位输出电压提供给高压隔离模块。高压隔离模块基于箝位输出电压，对第一电压和第二电压进行高压隔离。电位选择模块将高压隔离后的第一隔离电压和第二隔离电压进行比较，确定输出端的输出电压。基于本发明，对多路供电源进行箝位输出，对多路电源的电压进行高压隔离，减少电路中接触高压的电子器件，从而防止低压线路电子元件被高压电源影响，提高电子元件使用寿命。相较于现有技术，无需额外增加防倒灌装置来避免高电压电源与低电压电源之间的串通，有效减少整个供电电路的成本。 【EN】The invention provides a power supply input clamping circuit and a chip, wherein a power supply module comprises a first power supply and a second power supply, the clamping module clamps a first voltage provided by the first power supply and a second voltage provided by the second power supply respectively, and provides a clamped output voltage to a high-voltage isolation module. The high voltage isolation module performs high voltage isolation on the first voltage and the second voltage based on the clamped output voltage. The potential selection module compares the first isolation voltage and the second isolation voltage after high-voltage isolation to determine the output voltage of the output end. Based on the invention, the clamping output is carried out on the multi-path power supply, the high-voltage isolation is carried out on the voltage of the multi-path power supply, and the electronic devices contacting the high voltage in the circuit are reduced, thereby preventing the electronic elements of the low-voltage circuit from being influenced by the high-voltage power supply and prolonging the service life of the electronic elements. Compared with the prior art, the backflow prevention device does not need to be additionally arranged to avoid series connection between the high-voltage power supply and the low-voltage power supply, and the cost of the whole power supply circuit is effectively reduced.

摘要：【中文】本申请提供了一种充电芯片及其过压保护电路，该过压保护电路具体包括第一分压电阻、第二分压电阻、比较器、电荷泵、第一MOS管、第一滤波电容和低压钳位供电电路，其中，低压钳位供电电路的电压输入端与芯片输入端电连接，且通过电压输出端与充电芯片的功率输出端电连接，被配置为当第一MOS管处于被关断状态下，且芯片输入端的电压低于耐压阈值时，向功率输出端输出预设电压值的驱动电压，以使充电芯片的内部模块正常上电工作。这样，当充电芯片的输入电压恢复正常时，就可以在正常上电工作的内部模块的驱动下使充电芯片自行启动。 【EN】The application provides a charging chip and overvoltage protection circuit thereof, this overvoltage protection circuit specifically includes first divider resistor, second divider resistor, a comparator, the charge pump, first MOS pipe, first filter capacitor and low pressure clamp supply circuit, wherein, low pressure clamp supply circuit's voltage input end is connected with the chip input end electricity, and the power output end electricity through voltage output end and charging chip is connected, be configured to be under being in the shutoff state when first MOS pipe, and when the voltage of chip input end is less than withstand voltage threshold, to the drive voltage of power output end output default voltage value, so that the inside module of charging chip normally goes up electric work. Therefore, when the input voltage of the charging chip is recovered to be normal, the charging chip can be automatically started under the driving of the internal module which is normally electrified to work.

摘要：【中文】本申请公开了一种电源转换电路和集成电路，该电源转换电路具体包括第一电阻、第一NMOS管、第二NMOS管、振荡器和电荷泵，该电路通过电源输入端接收电能，并利用第二NOMS管的源极作为电源输出端向负载输出电压。本电路中，由于振荡器本身消耗电流，这样VA的实际电压值在GATE未稳定的时候可能较低，随着GATE变高，第一NMOS管被逐渐打开，进而为振荡器供电，使得VA升高，进而使得GATE更高。这样一来使得本电路在电源输入端的输入电压较低的情况下仍能正常工作，从而实现在输入电压较低时能够进行电源转换的目的。 【EN】The application discloses power conversion circuit and integrated circuit, this power conversion circuit specifically include first resistance, first NMOS pipe, second NMOS pipe, oscillator and charge pump, and this circuit passes through power input end and receives the electric energy to utilize the source electrode of second NOMS pipe as power output end to load output voltage. In this circuit, because oscillator itself consumes current, the actual voltage value of VA is probably lower when GATE is unstable like this, and along with GATE becomes high, first NMOS pipe is opened gradually, and then for the oscillator power supply for VA risees, and then makes GATE higher. Therefore, the circuit can still work normally under the condition that the input voltage of the power input end is lower, and the purpose of power conversion can be achieved when the input voltage is lower.

摘要：【中文】本发明公开了一种数字音频功率放大器，通过第一辅助电流源和第二辅助电流源为相应的积分器的输入端提供对应的辅助拉电流，避免了第一侧电流源、第二侧电流源和积分器相应功放环路没有足够的电压余量支持电路正常工作的情况出现。其次，改善了由于电流源的工艺偏差对提供给积分器的电流造成的影响，减小第一积分器和第二积分器分别为音频负载提供的电压的差异，消除直流失调电压。通过驱动电路的第一辅助状态和第二辅助状态交替运行，使得第一辅助电流源和第二辅助电流源分别交替为第一积分器的输入端和第二积分器提供辅助拉电流，避免了第一辅助电流源和第二辅助电流源制作工艺失配等非理想因素导致的电源抑制比下降的情况出现。 【EN】The invention discloses a digital audio power amplifier, which provides corresponding auxiliary source current for the input end of a corresponding integrator through a first auxiliary current source and a second auxiliary current source, and avoids the situation that the corresponding power amplification loops of a first side current source, a second side current source and the integrator do not have enough voltage margin to support the normal operation of a circuit. And secondly, the influence of the process deviation of the current source on the current provided for the integrator is improved, the difference of the voltages respectively provided by the first integrator and the second integrator for the audio load is reduced, and the direct-current offset voltage is eliminated. The first auxiliary current source and the second auxiliary current source alternately operate through the first auxiliary state and the second auxiliary state of the driving circuit, so that the first auxiliary current source and the second auxiliary current source alternately provide auxiliary source currents for the input end of the first integrator and the second integrator respectively, and the situation that the power supply rejection ratio is reduced due to non-ideal factors such as mismatch of manufacturing processes of the first auxiliary current source and the second auxiliary current source is avoided.

摘要：【中文】本发明提供了一种晶圆及其切割方法，包括多个曝光区，至少一个曝光区包括呈矩阵排列的多个功能区，相邻行的所述功能区之间具有第一划片道，相邻列的所述功能区之间具有第二划片道；所述功能区包括第一功能区和第二功能区，所述第一功能区内设有芯片，所述第二功能区内设有测试电路。由于相邻行的功能区之间具有第一划片道，相邻列的功能区之间具有第二划片道，因此，可以对第一划片道和第二划片道进行切割来将芯片分离开来，并且，由于测试电路不再设置在芯片之间的划片道内，因此，也不会出现因切割测试电路而导致刀片变钝以及芯片边缘出现崩缺等问题。 【EN】The invention provides a wafer and a cutting method thereof, wherein the wafer comprises a plurality of exposure areas, at least one exposure area comprises a plurality of functional areas which are arranged in a matrix manner, a first scribing channel is arranged between the functional areas of adjacent rows, and a second scribing channel is arranged between the functional areas of adjacent columns; the functional area comprises a first functional area and a second functional area, wherein a chip is arranged in the first functional area, and a test circuit is arranged in the second functional area. Because the first scribing channel is arranged between the functional areas of the adjacent rows and the second scribing channel is arranged between the functional areas of the adjacent columns, the chips can be separated by cutting the first scribing channel and the second scribing channel, and the problems of blade blunting, chip edge chipping and the like caused by cutting of the test circuit can be avoided as the test circuit is not arranged in the scribing channel between the chips.

摘要：【中文】本申请公开了一种数字音频功放电路及其电流采样控制电路，该电流采样控制电路具体包括输入信号选择电路、同步和滤波电路、边沿检测电路、计数器步进控制电路、脉冲计数器、延迟电路和采样控制单元。该电流采样控制电路根据输入的边沿检测使能信号、反馈选择信号、来自数字音频功放电路的两个模拟放大器的输出级的第一反馈信号和第二反馈信号最终输出采样控制信号，以便控制相应采样电路对喇叭的反馈电流实现精确采样，从而实现数字音频功放芯片根据反馈电流对喇叭进行过温保护。 【EN】The application discloses digital audio power amplifier circuit and current sampling control circuit thereof, and the current sampling control circuit specifically comprises an input signal selection circuit, a synchronization and filter circuit, an edge detection circuit, a counter stepping control circuit, a pulse counter, a delay circuit and a sampling control unit. The current sampling control circuit finally outputs sampling control signals according to the input edge detection enabling signals, the feedback selection signals, the first feedback signals and the second feedback signals from the output stages of the two analog amplifiers of the digital audio power amplifier circuit, so that the corresponding sampling circuits are controlled to accurately sample the feedback current of the loudspeaker, and the digital audio power amplifier chip carries out over-temperature protection on the loudspeaker according to the feedback current.

摘要：【中文】本发明提供了一种检测马达谐振频率的方法和系统，所述方法包括：在马达进入余振阶段后，测量马达的反向电动势；根据测量得到的反向电动势数据得到反向电动势的周期和反向电动势的振幅；根据反向电动势的周期得到马达的阻尼振荡频率，根据反向电动势的振幅以及阻尼振荡频率得到马达的实际谐振频率。基于此，本发明中不需要使用额外的传感器就能够获得准确的马达实际谐振频率，不仅能够更方便地在马达使用过程中实现对谐振频率的检测，而且与直接把阻尼振荡频率作为谐振频率的方式相比，能够更加准确地获得马达的实际谐振频率，进而能够使得马达具有更好的振动效果。 【EN】The invention provides a method and a system for detecting the resonant frequency of a motor, wherein the method comprises the following steps: measuring the back electromotive force of the motor after the motor enters a residual vibration stage; obtaining the period of the back electromotive force and the amplitude of the back electromotive force according to the measured back electromotive force data; and obtaining the damped oscillation frequency of the motor according to the period of the back electromotive force, and obtaining the actual resonance frequency of the motor according to the amplitude of the back electromotive force and the damped oscillation frequency. Based on the method, the accurate actual resonant frequency of the motor can be obtained without using an additional sensor, so that the resonant frequency can be more conveniently detected in the using process of the motor, and compared with a mode of directly taking the damped oscillation frequency as the resonant frequency, the actual resonant frequency of the motor can be more accurately obtained, and the motor has a better vibration effect.