Abstract: A detection circuit of an electronic device includes a resistance detecting circuit and a voltage supplying circuit, wherein the detecting circuit is coupled to an input circuit which is coupled to the electronic device and comprises a plurality of resistors respectively coupled to a plurality of switches, wherein the resistance detecting circuit is arranged to detect whether the input circuit has a resistance variation and generate a detecting signal indicative of the resistance variation; and the voltage supplying circuit is coupled to the resistance detecting circuit to supply a first voltage signal, wherein the voltage supplying circuit receives the detecting signal, and selectively switches the first voltage signal to a second voltage signal according to the detecting signal; wherein the resistance detecting circuit determines whether at least one of the plurality of switches is closed according to the second voltage signal.

Abstract: The present disclosure illustrates an electronic device with wake on voice function and an operating method thereof. The electronic device detects an audio signal in analog form by an additional pre-signal detector, and the pre-signal detector wakes up an analog-to-digital converter and a human voice detector when the audio signal in analog form is determined to satisfy a predetermined condition. When a host system of the electronic device enters into a sleep mode from an operation mode, the analog-to-digital converter and the human voice detector enter into a sleep mode together.

Abstract: A detection circuit of an electronic device includes a resistance detecting circuit and a voltage supplying circuit, wherein the detecting circuit is coupled to an input circuit which is coupled to the electronic device and comprises a plurality of resistors respectively coupled to a plurality of switches, wherein the resistance detecting circuit is arranged to detect whether the input circuit has a resistance variation and generate a detecting signal indicative of the resistance variation; and the voltage supplying circuit is coupled to the resistance detecting circuit to supply a first voltage signal, wherein the voltage supplying circuit receives the detecting signal, and selectively switches the first voltage signal to a second voltage signal according to the detecting signal; wherein the resistance detecting circuit determines whether at least one of the plurality of switches is closed according to the second voltage signal.

Abstract: A combo-plug detecting circuit for use in an audio CODEC is provided. The combo-plug detecting circuit is used to determine the contact configuration of the audio plug, to ensure that the audio plug belonging to the differential structure can be compatible with the audio CODEC.

Abstract: A combo-plug detecting circuit for use in an audio CODEC is provided. The combo-plug detecting circuit is used to determine the contact configuration of the audio plug, to ensure that the audio plug belonging to the differential structure can be compatible with the audio CODEC.

Abstract: An audio playback device that includes an audio receiver module, a loudspeaker module and an audio control circuit is provided. The audio control circuit includes an interface and a gain adjusting module. The interface receives an audio signal from an audio source. Under a first operation mode, the audio signal is transmitted only to the audio receiver module to be playback. Under a second operation mode, the audio signal is transmitted to the audio receiver module and to the loudspeaker module to be playback. The gain adjusting module includes a temperature sensing circuit to sense a temperature of the audio receiver module and a gain adjusting circuit electrically coupled between the audio interface and the audio receiver module to adjust a gain of the audio signal according to the temperature.

Abstract: Provided herein are a headphone amplifier circuit for a headphone driver, an operation method thereof, and a universal serial bus (USB) interfaced headphone device using the same. The output stage of the headphone amplifier circuit is improved to have a differential output structure so as to effectively solve the crosstalk issue and increase the isolation between the left and the right channels such that the audio content presents a spatial perception and a distance perception more specifically.

Abstract: The present disclosure illustrates an electronic device with wake on voice function and an operating method thereof. The electronic device detects an audio signal in analog form by an additional pre-signal detector, and the pre-signal detector wakes up an analog-to-digital converter and a human voice detector when the audio signal in analog form is determined to satisfy a predetermined condition. When a host system of the electronic device enters into a sleep mode from an operation mode, the analog-to-digital converter and the human voice detector enter into a sleep mode together.

Abstract: A motor stator device with simple coil-winding structure is disclosed. The motor stator device includes an insulating base comprising an outer ring base, an inner ring base and a connection base, the outer ring base and the inner ring base alternatively forming outer ring openings, inner ring openings, outer ring sinks and inner ring pillars, the connection base being provided to be wound with a metal coil; a plurality of stator segments being positioned on the insulating base; and a plurality of segment connectors being positioned on the outer ring sinks between the insulating base and the stator segments and having a base part and an extension part opposite to the base part, the extension part being integrally extended from the base part and toward the motor rotor to get close to the inner ring pillar next to the motor rotor, so as to decrease the cogging torque.

Abstract: Provided herein are a headphone amplifier circuit for a headphone driver, an operation method thereof, and a universal serial bus (USB) interfaced headphone device using the same. The output stage of the headphone amplifier circuit is improved to have a differential output structure so as to effectively solve the crosstalk issue and increase the isolation between the left and the right channels such that the audio content presents a spatial perception and a distance perception more specifically.

Abstract: An audio plug detection structure is disclosed, which is adapted for an audio jack corresponding to an audio plug and includes a first and second connection points, a time-varying signal generation circuit, and a comparison circuit. The time-varying signal generation and comparison circuits are connected to the first connection point. When the audio plug is inserted into the audio jack, the first connection point is connected to a first pole of the audio plug and the second connection point is connected to a second pole different from the first pole of the audio plug. Therefore, the time-varying signal generation circuit, the first connection point, an inner impedance circuit of the audio plug and the second connection plug form a loop. The comparison circuit outputs a determination signal indicating the audio plug is inserted by detecting a change of a time-varying signal generated by the time-varying signal generation circuit.

Abstract: An electronic apparatus comprises a switch, a processing unit, a functional unit and a power management unit. The function unit has a timer. The power management unit is coupled to the processing unit and the function unit. The processing unit and the function unit receive a switch signal generated by the switch. The processing unit generates a power-down signal after detecting a change in the logic level of the switch signal received for a first predetermined time. The timer starts counting upon detecting a change in the logic level of the switch signal, and executes a power-down procedure after the timer has counted to a second predetermined time. The second time is less than the first predetermined time. The function unit completes the power-down procedure before the power management unit receives the power-down signal and stops powering the processing unit and the function unit.

Abstract: A motor stator device with simple coil-winding structure is disclosed. The motor stator device includes an insulating base comprising an outer ring base, an inner ring base and a connection base, the outer ring base and the inner ring base alternatively forming outer ring openings, inner ring openings, outer ring sinks and inner ring pillars, the connection base being provided to be wound with a metal coil; a plurality of stator segments being positioned on the insulating base; and a plurality of segment connectors being positioned on the outer ring sinks between the insulating base and the stator segments and having a base part and an extension part opposite to the base part, the extension part being integrally extended from the base part and toward the motor rotor to get close to the inner ring pillar next to the motor rotor, so as to decrease the cogging torque.

Abstract: The present invention provides a signal processing circuit and a signal processing method applied to a headset. In the present invention, the signal processing circuit adjusts gain and phase of a left channel signal and a right channel signal to generate a first adjust signal, and a recorded sound from a microphone is added by the first adjust signal to cancel a coupled signal. In addition, the signal processing circuit adjusts gain and phase of the right channel signal to generate a second adjust signal, and the right channel signal is added by the second adjust signal to cancel a coupled signal; and the signal processing circuit adjusts gain and phase of the left channel signal to generate a third adjust signal, and the left channel signal is added by the third adjust signal to cancel a coupled signal.

Abstract: An audio plug detection structure is disclosed, which is adapted for an audio jack corresponding to an audio plug and includes a first and second connection points, a time-varying signal generation circuit, and a comparison circuit. The time-varying signal generation and comparison circuits are connected to the first connection point. When the audio plug is inserted into the audio jack, the first connection point is connected to a first pole of the audio plug and the second connection point is connected to a second pole different from the first pole of the audio plug. Therefore, the time-varying signal generation circuit, the first connection point, an inner impedance circuit of the audio plug and the second connection plug form a loop. The comparison circuit outputs a determination signal indicating the audio plug is inserted by detecting a change of a time-varying signal generated by the time-varying signal generation circuit.

Abstract: A button control method for a built-in audio codec of a portable electronic apparatus, and the button control method includes the following steps. A plurality of button signals generated by a button unit is first detected during a button detection period. Next, the button signals are sequentially recorded during the button detection period. The processing unit matches and identifies the button signals provided thereto to generate a control command accordingly to correspondingly control the portable electronic apparatus.

Abstract: An electronic apparatus comprises a switch, a processing unit, a functional unit and a power management unit. The function unit has a timer. The power management unit is coupled to the processing unit and the function unit. The processing unit and the function unit receive a switch signal generated by the switch. The processing unit generates a power-down signal after detecting a change in the logic level of the switch signal received for a first predetermined time. The timer starts counting upon detecting a change in the logic level of the switch signal, and executes a power-down procedure after the timer has counted to a second predetermined time. The second time is less than the first predetermined time. The function unit completes the power-down procedure before the power management unit receives the power-down signal and stops powering the processing unit and the function unit.

Abstract: The present invention provides a signal processing circuit and a signal processing method applied to a headset. In the present invention, the signal processing circuit adjusts gain and phase of a left channel signal and a right channel signal to generate a first adjust signal, and a recorded sound from a microphone is added by the first adjust signal to cancel a coupled signal. In addition, the signal processing circuit adjusts gain and phase of the right channel signal to generate a second adjust signal, and the right channel signal is added by the second adjust signal to cancel a coupled signal; and the signal processing circuit adjusts gain and phase of the left channel signal to generate a third adjust signal, and the left channel signal is added by the third adjust signal to cancel a coupled signal.

Abstract: A fan device for use in an electronic apparatus is proposed, the fan device being installed adjacent to a back-panel formed with an emitting diode component and composed of: a fan body, a fastening member and a light-guiding member, wherein the fan body is provided with a plurality of positioning holes for accommodating the light-guiding member, which is then fastened by the fastening member such that the end of the light-guiding member is close to the back panel to provide for a light source by means of the emitting diode of the back panel, allowing the light-guiding member to receive and guide the light to the front of the fan body, whereby the use can observe and judge if the fan device works normally or not from the varied brightness of light shown by the light-guiding member.

Abstract: An assembling member and a heat-dissipating module having the assembling member are proposed. The assembling member connects a fan having at least a receiving space and a plurality of first positioning portions to an electronic host housing having a plurality of first fixing portions. The assembling member includes a main body for being accommodated into the receiving space, a plurality of first coupling portions for coupling with the first positioning portions, an elastic portion disposed at one side of the main body, and a plurality of first engaging portions for engaging with the first fixing portions. The first engaging portions are connected to the elastic portions, such that the first engaging portions can be urged by the elastic portions of the assembling member to engage with the first fixing portions. The heat-dissipating module of the present invention is easy to assemble and disassemble, has simple structure and low cost.