Abstract: A Bluetooth low energy (BLE) beacon device and a BLE advertising method are provided. The BLE advertising method includes: enabling a broadcast action with different advertising packets simultaneously, wherein the advertising packets include connectable and unconnectable advertising packets; setting advertising time information of the advertising packets; setting advertising data and an advertising packet address code; and executing the broadcast action for the advertising packets in sequence according to the advertising time information and the type of each of the advertising packets.

Abstract: The present disclosure illustrates a speaker apparatus and a speaker apparatus system, wherein the speaker apparatus includes a communication unit, an audio codec, a sound unit and a clock unit. The audio codec is coupled to the communication unit. The sound unit is coupled to the audio codec. The clock unit is coupled to the communication unit. The communication unit is configured for wirelessly receiving and broadcasting audio data. The audio codec is configured for decoding the audio data and generating an analog signal according to the decoded audio data. The sound unit is configured for transforming the analog signal into an acoustic wave. The clock unit synchronizes with at least one other speaker apparatuses by a synchronous signal.

Abstract: The present disclosure illustrates a multi-systems integrated modulation module. The modulation module includes a first modulation circuit and a second modulation circuit. The first modulation circuit includes a high frequency oscillator and high frequency mixers. The second modulation circuit includes a low frequency oscillator and low frequency mixers. The second modulation circuit couples to the first modulation circuit. The high frequency mixers couple to the high frequency oscillator and the low frequency mixers couple to the low frequency oscillator. The high frequency mixers and the low frequency mixers provide high frequency signals and low frequency signals separately. The frequency mixers mix radio frequency signals with the high frequency signals or low frequency signals. The modulation module forms a first signal path by the first modulation circuit, and forms a second signal path by the first modulation circuit and the second modulation circuit.

Abstract: An electrostatic discharge protection device is disclosed. The electrostatic discharge protection device comprises a N+ well, a P doping region, a first N doping region, a plurality of N sub-doping regions, a first N+ doping region, a first P+ doping region, a second N+ doping region, and a second doping region. The P doping region is disposed in the N+ well. The first N doping region is disposed in the P doping region. The plurality of N sub-doping regions is disposed in parallel in the P doping region. The first N+ doping region is disposed in the first N doping region. The first P+ doping region is disposed in the first N doping region. The second N+ doping region is disposed in the P doping region.

Abstract: A voltage generator is disclosed. The voltage generator includes an operational amplifier, an offset voltage tuner, and an output stage circuit. The operational amplifier receives an input voltage and adjusts an offset voltage of the operating amplifier according to a control signal. The offset voltage tuner provides the control signal. The output stage circuit generates an output voltage according to a voltage on an output terminal of the operational amplifier, and provides the output voltage to the operational amplifier.

Abstract: The present invention provides a blue-tooth communication system and broadcasting methods thereof. The broadcasting method includes: firstly, detecting N blue-tooth receivers in a blue-tooth range of a blue-tooth transmitter, wherein N is a positive integer; and broadcasting a data package by the blue-tooth transmitter in a first transmission timing window; then respectively receiving N acknowledgement packages from the blue-tooth receiver by the blue-tooth transmitter in a plurality of reception timing windows.

Abstract: The present disclosure illustrates a multi-systems integrated modulation module. The modulation module includes a first modulation circuit and a second modulation circuit. The first modulation circuit includes a high frequency oscillator and high frequency mixers. The second modulation circuit includes a low frequency oscillator and low frequency mixers. The second modulation circuit couples to the first modulation circuit. The high frequency mixers couple to the high frequency oscillator and the low frequency mixers couple to the low frequency oscillator. The high frequency mixers and the low frequency mixers provide high frequency signals and low frequency signals separately. The frequency mixers mix radio frequency signals with the high frequency signals or low frequency signals. The modulation module forms a first signal path by the first modulation circuit, and forms a second signal path by the first modulation circuit and the second modulation circuit.

Abstract: A low dropout voltage regulator is provided. The low dropout voltage regulator includes a comparison unit, a buck unit, a feedback unit and a current-drawing unit. The comparison unit is used for receiving a reference voltage and a feedback voltage, and comparing the reference voltage and the feedback voltage to output a first voltage. The buck unit is used for receiving an input voltage and the first voltage and transferring the input voltage to a output voltage. The feedback unit is used for receiving the output voltage, and converting the output voltage to a feedback voltage, and then transmitting the feedback voltage to the comparison unit. The current-drawing unit determines whether to draw a portion of a first current generated by the buck unit, so as to stabilize the output voltage.

Abstract: The invention provides a clock apparatus includes a clock source, a first resistor, a diode, an amplifier, and an oscillator. The current source provides a current, and the current has a first temperature coefficient. The first resistor has a first end, and the first end receives the current. The anode of the diode is coupled to a second end of the first resistor, the cathode of the diode is coupled to a reference ground. The diode has a second temperature coefficient. The amplifier receives a power source. The amplifier generates an output voltage according to the power source and a voltage on the first end of the first resistor. The oscillator receives the output voltage to be an operating power. Wherein, the first and second temperature coefficients are complementary.

Abstract: A voltage generator is disclosed. The voltage generator includes an operational amplifier, an offset voltage tuner, and an output stage circuit. The operational amplifier receives an input voltage and adjusts an offset voltage of the operating amplifier according to a control signal. The offset voltage tuner provides the control signal. The output stage circuit generates an output voltage according to a voltage on an output terminal of the operational amplifier, and provides the output voltage to the operational amplifier.

Abstract: The present invention provides a headphone apparatus and a headphone driving apparatus thereof The headphone driving apparatus includes a first and second driving circuits, a signal transmitting circuit, a first and second reference signal generators. The first driving circuit receives a first audio signal pair and generates a first driving signal. The second driving circuit receives a second audio signal pair and generates a second driving signal. The signal transmitting circuit transmits the first audio signal pairs or the reference signal to the first output end pair. The signal transmitting circuit decides to transmit the second audio signal pairs to the second output end pair or not according to the mode selecting signal. The second reference signal generator receives signals and generates the second reference signal. Wherein, the first and second reference signal generators are turned off according to the mode selecting signal.

Abstract: A voltage generating apparatus is provided. The voltage generating apparatus includes a reference voltage generator and an output voltage generator. The reference voltage generator is used for generating a reference voltage, and the reference voltage generator decides to generate the reference voltage or not according to a control signal. The output voltage generator includes a comparator, a variable resistor and a current source. The comparator compares the reference voltage and an output voltage to generator a calibrating signal. A resistance of the variable resistor is decided by the calibrating signal. The current source provides an output current to flow through the variable resistor for generating the output voltage. Wherein, the reference voltage is generated during an initial timing period, and the generator is turned off after the initial timing period. The initial timing period is determined according to the control signal.

Abstract: The voltage generator provided by the present invention includes: a first current source, a second current source, a first resistor, a reference voltage generator, a first amplifier and a second amplifier. The first current source generates a first current and a second current with a first temperature coefficient according to a first bias voltage. The second current source generates a third current and a fourth current with a second temperature coefficient according to a second bias voltage. The reference voltage generator provides a first reference voltage and a second reference voltage according to the first and third currents. The first amplifier generates the first bias voltage according to the first and second reference voltages. The second amplifier generates the second bias voltage according to the second and third reference voltages. Wherein, the first temperature coefficient and the second temperature coefficient are complementary.

Abstract: The present invention relates to an adaptive, high cost-performance efficient, and power-saving receiving method used for wireless communication systems, such as but not limited to Bluetooth (BT) system, in particular to a method which can detect the presence or absence of the adjacent channel interference (ACT) before the scheduled starting time for receiving a Bluetooth packet, and accordingly set the receiver configurations including the filter's pass-band bandwidth (BW), filter's order, the sampling rate or the number of analog-to-digital-converter (ADC) output bits, and the automatic-gain-control (AGC) algorithm to determine the low noise amplifier (LNA) and variable gain amplifier (VGA) settings.

Abstract: The disclosure provides a switchable filtering circuit and the related operation method, in particular related to a filtering circuit which can be used for Bluetooth system and wireless local area network system. By using a first switch, a hybrid filtering circuit and a second switch, the received mode and transmitted mode between these two systems is realized. Moreover, the frequency responses and the bandwidth adjustments can be controlled according to the plurality of switchable resistors, the plurality of switchable capacitors and the shared and switchable resistors within the hybrid filter circuit. Moreover, the effects of high operated freedom of the circuit and the circuit size reduction can be achieved.

Abstract: The present invention relates to an adaptive, cost-performance efficient, power-saving apparatus for wireless communication systems, such as but not limited to Bluetooth (BT) receivers, and in particular to a packet-based receiver's decoding algorithm which can detect the presence or absence of the adjacent channel interference (ACI) before the scheduled starting time for receiving a Bluetooth packet, and accordingly set the receiver configurations including the filter's pass-band bandwidth (BW), filter's order, the sampling rate, the number of analog-to-digital-converter (ADC) output bits, and the automatic-gain-control (AGC) algorithm unit to determine the low noise amplifier (LNA) and variable gain amplifier (VGA) settings.

Abstract: The present invention discloses a battery powered apparatus with the circuit of integrated power management and charger unit. It mainly comprises a power management and charger unit, a battery powered device, a battery and an adaptor. By integrating the charger unit, the power switch and the programmable current source to the micro-processor, the micro-processor can properly control the power supplied from the adaptor to the battery under the charging mode operation, which further derives a smoother curve of charging current.

Abstract: The present invention discloses apparatus and method for fast and robust automatic gain control (AGC). By using the power statistics and/or the amplitude statistics of multiple pairs of signed ADC outputs, the additional gain control can be determined and included in a statistics-aided AGC to successfully complete the AGC function for a received signal having a dynamic range up to 100 dB within a few micro-seconds.

Abstract: The disclosure relates to a system to deliver prioritized game audio wirelessly with a minimal latency by processing a low-priority game audio (such as background music) and high-priority game audio (such as sound effects) in a wireless gaming system, resulting in a minimal high-priority audio latency. The disclosure can then be used to transmit high quality positional multichannel audio at a minimal wireless bandwidth.

Abstract: A low dropout voltage regulator is provided. The low dropout voltage regulator includes a comparison unit, a buck unit, a feedback unit and a current-drawing unit. The comparison unit is used for receiving a reference voltage and a feedback voltage, and comparing the reference voltage and the feedback voltage to output a first voltage. The buck unit is used for receiving an input voltage and the first voltage and transferring the input voltage to a output voltage. The feedback unit is used for receiving the output voltage, and converting the output voltage to a feedback voltage, and then transmitting the feedback voltage to the comparison unit. The current-drawing unit determines whether to draw a portion of a first current generated by the buck unit, so as to stabilize the output voltage.