Abstract: An example power adaptor includes a converter and a circuit to detect an overcurrent event at the converter and to pause power output of the converter when the overcurrent event is detected. The circuit is further to count a number of overcurrent events at the converter within a time period. The circuit is further to compare the number of overcurrent events to a threshold number and to switch off the power output of the converter when the number of overcurrent events passes the threshold number.

Abstract: One embodiment provides a system that obtains, for a business entity, review and revenue information for a period of time from network packets, and extracts rankings and revenues from the review and revenue information. The system determines respective correspondence between the rankings and revenues for a plurality of points of time. The system determines first and second normalized rankings for first and second points of time, respectively, in the plurality of points of time. The system determines first and second normalized revenues for the first and second points of time, respectively. The system calculates a first correlation strength between the changes in the first and second normalized rankings, and the changes in the first and second normalized revenues. The system computes a correlation between the rankings and corresponding revenues based on a plurality of correlation strengths, which includes the first correlation strength, over the period of time.

Abstract: An example power adaptor includes a converter and a circuit to detect an overcurrent event at the converter and to pause power output of the converter when the overcurrent event is detected. The circuit is further to count a number of overcurrent events at the converter within a time period. The circuit is further to compare the number of overcurrent events to a threshold number and to switch off the power output of the converter when the number of overcurrent events passes the threshold number.

Abstract: One embodiment provides a system that obtains, for a business entity, review and revenue information for a period of time from network packets, and extracts rankings and revenues from the review and revenue information. The system determines respective correspondence between the rankings and revenues for a plurality of points of time. The system determines first and second normalized rankings for first and second points of time, respectively, in the plurality of points of time. The system determines first and second normalized revenues for the first and second points of time, respectively. The system calculates a first correlation strength between the changes in the first and second normalized rankings, and the changes in the first and second normalized revenues. The system computes a correlation between the rankings and corresponding revenues based on a plurality of correlation strengths, which includes the first correlation strength, over the period of time.

Abstract: A passive component with temperature compensation and an electronic device using the same are provided. The electronic device includes a central processor unit (CPU), a filter and a power conversion circuit. The filter includes the passive component and a variable resistor. The passive component includes an inductor and a negative temperature coefficient (NTC) resistor. The NTC resistor is contacted with a surface of the inductor, and the NTC resistor and the inductor are disposed in a package. The power conversion circuit provides a current information to the CPU according to a partial voltage difference of the filter. The power conversion circuit controls an output voltage through the filter according to a first control signal of the CPU, so as to provide the output voltage. The electronic device further includes an embedded controller. The embedded controller controls the variable resistor according to a second control signal of the CPU.

Abstract: A charging indication apparatus and a method thereof are provided. A switching signal for controlling an operation frequency of a power conversion circuit is divided to obtain a divided frequency signal, and according to the divided frequency signal, a backlight module is controlled to emit a backlight source serving as a charging indication signal.

Abstract: A charging indication apparatus and a method thereof are provided. A switching signal for controlling an operation frequency of a power conversion circuit is divided to obtain a divided frequency signal, and according to the divided frequency signal, a backlight module is controlled to emit a backlight source serving as a charging indication signal.

Abstract: A hub apparatus for USB and a power management method thereof are provided. The hub apparatus includes at least one USB-PD port, at least one USB port and a control unit. The control unit detects whether the USB-PD port is connected to a first external device and whether the USB port is contacted to a second external device respectively. When the at least one first external device complies with a USB-PD interface and a connecting situation of the at least one first external device and the at least one second external device are changed, the control unit determines a required power supply determination value according to the connecting situation of the at least one first external device and the at least one second external device, and accordingly, the control unit communicates with the first external device to set a power transmission profile of the at least one USB-PD port.

Abstract: A passive component with temperature compensation and an electronic device using the same are provided. The electronic device includes a central processor unit (CPU), a filter and a power conversion circuit. The filter includes the passive component and a variable resistor. The passive component includes an inductor and a negative temperature coefficient (NTC) resistor. The NTC resistor is contacted with a surface of the inductor, and the NTC resistor and the inductor are disposed in a package. The power conversion circuit provides a current information to the CPU according to a partial voltage difference of the filter. The power conversion circuit controls an output voltage through the filter according to a first control signal of the CPU, so as to provide the output voltage. The electronic device further includes an embedded controller. The embedded controller controls the variable resistor according to a second control signal of the CPU.

Abstract: A electronic device and a power supplying method thereof are provided. The device includes a system unit, an internal power supplying unit and a power controller. The internal power supplying unit is coupled to the system unit, and supplies a system voltage to the system unit. The power controller is coupled to the system unit and the internal power supplying unit, and determines a source of the external voltage according to a voltage value of the external voltage. When the power controller determines that the source of the external voltage is a mobile power supply device, the power controller provides the external voltage to the system unit, and does not charge the internal power supplying unit with the external voltage. The voltage value of the external voltage provided by the mobile power supply device is higher than the voltage value of the system voltage.

Abstract: A system, and an apparatus of speaker, and a method for forming a virtual audio is provided. An audio source is processed by a second audio source processing program according to parameters which are entered by the user, and filtered to be a high frequency audio signal. The audio source with orientation is outputted by the orientation speaker.

Abstract: A method for adjusting a system performance of a portable electronic device is disclosed. The portable electronic device is connected to a power adapter for obtaining external power supply. The method comprises the steps of: receiving a voltage signal outputted from the power adapter; determining whether to execute an over current protection by the power adapter; calculating a recovering time of the voltage signal if the over current protection is executed by the power adapter, wherein the recovering time is a time period from stopping an output of the voltage signal to restarting the output thereof; and determining an output power of the power adapter to adjust the system performance of the portable electronic device according to the recovering time.

Abstract: A method for adjusting a system performance of a portable electronic device is disclosed. The portable electronic device is connected to a power adapter for obtaining external power supply. The method comprises the steps of: receiving a voltage signal outputted from the power adapter; determining whether to execute an over current protection by the power adapter; calculating a recovering time of the voltage signal if the over current protection is executed by the power adapter, wherein the recovering time is a time period from stopping an output of the voltage signal to restarting the output thereof; and determining an output power of the power adapter to adjust the system performance of the portable electronic device according to the recovering time.

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract: The invention provides a switching audio power amplifier with de-noise function, including a first comparator, a second comparator, a logic control unit, a de-noise circuit, and a bridge circuit. The first comparator and the second comparator respectively generate the first PWM signal and the second PWM signal, and then the logic control unit performs logic operation to generate a third PWM signal and a fourth PWM signal. If the pulse width of the third PWM signal (or the fourth PWM signal) is lower than a threshold, the de-noise circuit increases the pulse width of the third PWM signal or the fourth PWM signal and outputs the fifth PWM signal and the sixth PWM signal to drive the bridge circuit. Next, the bridge circuit conducts a driving current alternately flowing to and from a load according to the firth PWM signal and the sixth PWM signal.

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract: An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.

Abstract: An audio power amplifier package includes a non-signal lead, a first non-signal pad, a second non-signal pad and a plurality of bonding wires. The first non-signal pad and the second non-signal pad are disposed on a substrate. The bonding wires connect the non-signal lead to the first non-signal pad and the second non-signal pad respectively.

Abstract: A class D audio amplifier includes an error amplifier, a comparator, a bridge circuit, a feedback circuit and a silent start circuit. The error amplifier generates an error signal by amplifying a difference between a feedback signal and an audio input signal. The comparator generates a first pulse width modulation (PWM) signal by comparing a first triangular-wave signal and the error signal. The bridge circuit has switches alternately conducting a current flowing into and from a load. The feedback circuit generates the feedback signal indicating a condition of the load. The silent start circuit performs AND operation of the first PWM signal and a second PWM signal having a gradually increased duty ratio to generate a third PWM signal for control of the switches of the bridge circuit.

Abstract: The present invention discloses an audio signal processing device capable of transmitting at least one audio signal generated by an audio decoder to at least one first speaker and a second speaker. The audio signal processing device includes a signal mixer and at least one filter. By the at least one filter, a first signal having a frequency larger than a first specific frequency in each audio signal is transmitted to at least one first speaker, and a second signal having a frequency smaller than the first specific frequency in each audio signal is transmitted to the signal mixer and then transmitted to the second speaker.