Shenzhen Electronic Technology Co., Ltd. Newell synthesizer transceiver module is the most critical part. PLL synthesizer when using channel selection and receive modes. In receive mode, the phase locked loop closure surface treatment Bluetooth module, receiver module demodulation required for providing a stable local oscillator signal. In transmit mode Bluetooth module to do it blind hole, phase-locked loop is open, the modulation signal to the VCO loaded directly modulates the carrier. In this case the carrier frequency is maintained by the loop filter output voltage. Usually transmit frequency synthesizer work is only half the frequency in order to reduce the coupling of the RF amplifier. Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2-40 layer multilayer professional providers, to provide customers with high-precision, high Shenzhen circuit board quality, quality assurance Bluetooth module gilded or silvered, reasonable prices. Front and rear audio AD and DA have amplification and filtering circuit, under normal circumstances, the audio AD and DA integrated onto a single chip, the system uses TI's TLV320AIC10 Bluetooth module, set the sampling frequency of 8KHz, a keyboard for input and control, LCD display a variety of information, Flash DSP needed to save the program, calls for power on DSP; JTAG emulation interfaces are DSP, DSP also provides HPI port, the interface can be connected to a computer, you can download computer files by DA player, digital voice signal can also be transferred to the computer storage and handling. Bluetooth module is several layers of boards, Guangdong Bluetooth module, Newell record provided by the Department of Shenzhen-Electronic Technology Co., Ltd. Bluetooth module is several layers of boards, Guangdong Bluetooth module, Newell Year is the Year of the Shenzhen-Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) this year introduced a new upgrade, the above picture is for reference Please call the telephone or pictures on this page, for the latest information, contact: Huang Shengxing.