Abstract: A controlling circuit, utilized in an ear bud device which can be charged by a charging device, includes a voltage detection circuit and a processing circuit. The voltage detection circuit is coupled to a power input pin of a communication interface between the ear bud device and the charging device and used for detecting a voltage level of an analog power supply signal at the power input pin to generate a digital input signal. The processing circuit is coupled to the voltage detection circuit and used for receiving the digital input signal to obtain data information carried by the analog power supply signal outputted from the charging device.

Abstract: A control chip comprising: at least pin; a control circuit; a clock generation circuit, configured to generate a clock signal; a power providing circuit, configured to provide an always on power; a touch detection circuit, configured to receive the always on power, and configured to detect a touch event via the pin to generate a touch detection signal; a logic circuit, configured to receive the always on power, the clock signal and the touch detection signal, wherein the logic circuit controls the power providing circuit to provide a core power to the control circuit according to the touch detection signal. The control circuit is further configured to set the logic circuit such that the logic circuit can control the touch detection circuit. A related touch detection method is also discloses. Via the control chip and the touch detection method, the circuit area and the power consumption can be decreased.

Abstract: A method applied into a controller of a wireless Bluetooth device includes: providing a first flag and a second flag; asserting the first flag when the controller successfully receives the particular packet transmitted from the audio gateway; asserting the second flag when the controller successfully receives an acknowledgement from a secondary device wherein a reception of the acknowledgement indicates that the secondary device successfully receives the particular packet; and transmitting an acknowledgement of a particular packet to an audio gateway when the first flag and the second flag are asserted.

Abstract: A non-transitory computer readable medium storing at least one program, wherein a wireless communication method is performed while the program is executed. The wireless communication method comprises: (a) receiving a plurality of data groups, wherein the data groups do not pass an error checking procedure; (b) selecting a portion of at least one of the data groups; and (c) reconstructing a reconstruction data group based on the portions selected in the step (b).

Abstract: There is provided a fast paging procedure in which a master device repeatedly sends the paging message to a slave device using predetermined channel frequencies, wherein a selection of the predetermined channel frequencies is not calculated or predicted from the slave's Bluetooth device address. When the master device receives a slave page response message at one frequency among the predetermined channel frequencies, the master device transmits an FHS packet to the slave device at the same frequency in which the slave page response message was received.

Abstract: Disclosed are an electrostatic discharge circuit and a method for preventing malfunctions of an integrated circuit due to a reverse connection of a power source. The electrostatic discharge circuit includes at least one MOSFET for providing an electrostatic discharging current path, and a control circuit coupled to the at least one MOSFET. When an external power supply is reversely connected, the control circuit is configured to change a potential of a body of at least one MOSFET, such that the at least one MOSFET is turned off, thereby preventing the integrated circuit from malfunctioning caused by a current generated by the reverse connection of the external power source flowing through the at least one MOSFET.

Abstract: A method applied into a controller of a Bluetooth device includes: providing a first flag and a second flag which are configured as a default value respectively; changing the first flag from the default value when the controller successfully receives the particular packet transmitted from the audio gateway; changing the second flag from the default value when the controller successfully receives an acknowledgement from a secondary device wherein a reception of the acknowledgement indicates that the secondary device successfully receives the particular packet; and transmitting an acknowledgement of a particular packet to an audio gateway when detecting that either the first flag or the second flag changes and becomes different from the default value.

Abstract: A calibration loop method and technical solution capable of finding or searching for an optimum setting, which can be applied to mitigate or minimize clock harmonic interference, for each of different channel frequencies used by a wireless communication device such as Bluetooth device. The optimum setting for example may comprise an optimum setting of a supply voltage level provided from a voltage regulator to a frequency generating circuit such as phase-locked loop (PLL), an optimum setting of a capacitance of an adjustable capacitor circuit such as controllable switching capacitor coupled between the input of a phase frequency detector (PFD) of the PLL and the ground, or an optimum setting of a combination of the supply voltage level with capacitance of the controllable switching capacitor.

Abstract: A method applied into a controller of a wireless Bluetooth device includes: providing a first flag and a second flag; asserting the first flag when the controller successfully receives the particular packet transmitted from the audio gateway; asserting the second flag when the controller successfully receives an acknowledgement from a secondary device wherein a reception of the acknowledgement indicates that the secondary device successfully receives the particular packet; and transmitting an acknowledgement of a particular packet to an audio gateway when the first flag and the second flag are asserted.

Abstract: There is provided a fast paging procedure in which a master device repeatedly sends the paging message to a slave device using predetermined channel frequencies, wherein a selection of the predetermined channel frequencies is not calculated or predicted from the slave's Bluetooth device address. When the master device receives a slave page response message at one frequency among the predetermined channel frequencies, the master device transmits an FHS packet to the slave device at the same frequency in which the slave page response message was received.

Abstract: A method applied to a wireless Bluetooth audio communication system includes: providing an audio gateway of a first piconet to communicate with a master device in the first piconet and to transmit at least one packet of audio stream to the master device and a slave device; employing a first transceiver as the master device to receive the at least one packet of the audio stream from the audio gateway; and, employing a second transceiver as the slave device to receive the at least one packet of the audio stream from the audio gateway and to acknowledge the first transceiver whether the second transceiver has successfully received the at least one packet of the audio stream from the audio gateway.

Abstract: There is provided a fast paging procedure in which a master device repeatedly sends the paging message to a slave device using predetermined channel frequencies, wherein a selection of the predetermined channel frequencies is not calculated or predicted from the slave's Bluetooth device address. When the master device receives a slave page response message at one frequency among the predetermined channel frequencies, the master device transmits an FHS packet to the slave device at the same frequency in which the slave page response message was received.

Abstract: An inductor circuit includes first inductive circuit, second inductive circuit, and third inductive circuit. First inductive circuit at receiver side has a first end coupled to a first port of an antenna and a second end coupled to an input port of a receiving circuit. Second inductive circuit at transmitter side has a first end and a second end respectively coupled to output ports of a power amplifier. Third inductive circuit at antenna side has a first end coupled to a first port of the antenna and having a second end. Second inductive circuit and the third inductive circuit are disposed on an outer ring to form a ring shape and the third inductive circuit is disposed on an inner ring within the outer ring to form a spiral shape. Third inductive circuit is disposed between the second inductive circuit and the first inductive circuit.

Abstract: A method applied to a wireless Bluetooth audio communication system includes: providing an audio gateway of a first piconet to communicate with a master device in the first piconet and to transmit at least one packet of audio stream to the master device and a slave device; employing a first transceiver as the master device to receive the at least one packet of the audio stream from the audio gateway; and, employing a second transceiver as the slave device to receive the at least one packet of the audio stream from the audio gateway and to acknowledge the first transceiver whether the second transceiver has successfully received the at least one packet of the audio stream from the audio gateway.

Abstract: There is provided a reference voltage generator for providing an adaptive voltage. The reference voltage generator includes a steady current source and a PMOS transistor and an NMOS transistor cascaded to each other. A reference voltage provided by the reference voltage generator is determined by gate-source voltages of the PMOS transistor and the NMOS transistor. As said gate-source voltages vary with the temperature and manufacturing process, the reference voltage forms a self-adaptive voltage.

Abstract: An inductor circuit includes first inductive circuit, second inductive circuit, and third inductive circuit. First inductive circuit at receiver side has a first end coupled to a first port of an antenna and a second end coupled to an input port of a receiving circuit. Second inductive circuit at transmitter side has a first end and a second end respectively coupled to output ports of a power amplifier. Third inductive circuit at antenna side has a first end coupled to a first port of the antenna and having a second end. Second inductive circuit and the third inductive circuit are disposed on an outer ring to form a ring shape and the third inductive circuit is disposed on an inner ring within the outer ring to form a spiral shape. Third inductive circuit is disposed between the second inductive circuit and the first inductive circuit.

Abstract: A method applied into a controller of a wireless Bluetooth device includes: providing a first flag and a second flag; asserting the first flag when the controller successfully receives the particular packet transmitted from the audio gateway; asserting the second flag when the controller successfully receives an acknowledgement from a secondary device wherein a reception of the acknowledgement indicates that the secondary device successfully receives the particular packet; and transmitting an acknowledgement of a particular packet to an audio gateway when the first flag and the second flag are asserted.

Abstract: A method applied into a controller of a wireless Bluetooth device includes: providing a first flag and a second flag; asserting the first flag when the controller successfully receives the particular packet transmitted from the audio gateway; asserting the second flag when the controller successfully receives an acknowledgement from a secondary device wherein a reception of the acknowledgement indicates that the secondary device successfully receives the particular packet; and transmitting an acknowledgement of a particular packet to an audio gateway when the first flag and the second flag are asserted.

Abstract: A method for tuning a current source of a digitally controlled oscillator having an LC tank having a tunable capacitor bank includes: determining a specific threshold according to a resolution of a bit number of the tunable capacitor bank; configuring a current flowing through the current source at a first current level; tuning the current flowing through the current source from the first current level to a lower current level; comparing a variation of a digital value of the tunable capacitor bank with the specific threshold, the digital value corresponding to the lower current level; and determining that a current level required by the digitally controlled oscillator is decreased down to the lower current level and then configuring the current flowing through the current source at the lower current level if the variation of the digital value is smaller than the specific threshold.

Abstract: A method of a control circuit of a communication device comprises: receiving a data signal to generate a phase data signal to a digital phase-locked loop (DPLL); using the DPLL to receive the phase data signal, to dynamically lock a particular clock, and to generate a phase modulation signal based on the phase data signal; and determining or adjusting an equivalent capacitance of an inter-stage circuit which is coupled between the DPLL and a power amplifier and configured for processing the phase modulation signal and generating a processed phase modulation signal to the power amplifier.