Abstract: A method applied into a wireless Bluetooth device includes: receiving a particular packet from an audio gateway through a first piconet; receiving a first acknowledgement from a secondary device through a second piconet, the first acknowledgement corresponding to a retransmission of the particular packet; and transmitting a second acknowledgement corresponding to the particular packet to the audio gateway through the first piconet when the particular packet is received through the first piconet and the first acknowledgement corresponding to the retransmission of the particular packet is received through the second piconet.

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.