Logic and digital signal processing part of the circuit logic

Logic and digital signal processing part of the circuit logic and digital signal processing part of the circuit logic and digital signal processing part of the circuit phone logical part of the circuit including the CPU and FLASH; * CPU CS signal to FLASH communications. (Chip select signal CSflash, CSRAM, CSROM These signals are usually H level and L level.) * CPU through the control and the RF part of the sampling circuit monitoring the RF part; (Tx EN RxEN signal to achieve the control), Shenzhen Gionee Communication Co., Ltd. - Jinming Electronics. logic and digital signal processing part of the circuit logic and digital signal processing part of the circuit logic and digital signal processing part of the circuit. And then turn them on after switching off the power supply when the green light of the detector of cell phone jammer intelligent system flashes. The EN signal is needed to control the PLL to generate different frequencies; through the display control and data signals to achieve the display of the display (LCDWR. LCDA2. LCDEN display) Shenzhen Gionee Communication Co., Ltd. - Jinming Electronics. logic and digital signal processing part of the circuit 3 logic and digital signal processing part of the circuit 3 logic and digital signal processing part of the circuit * the DSP to the CPU, and to the analog voice signal through the channel coding, encryption, GMSK modulation, analog to digital converter,

Local oscillator VCO to work under the conditions of supply and VCTL and VSW, the output of the vibration frequency, to ensure the accuracy of the frequency, the sampling circuit sampling frequency back to the phase-locked loop circuit; Shenzhen Gionee Communication Co., Ltd. - And the power supply switch should be turned off for once until the green light of the detector ofcell phone jammerintelligent system flashes. Jinming Electronic RF local oscillator works two RF local oscillator works in the phase-locked loop circuit has a phase detector by comparing the sampling frequency is equal to the desired frequency, such as the sampling frequency is different from the desired frequency, the frequency synthesizer to achieve the desired frequency by adjusting the control voltage of the local oscillator VCO-VCTL.

Clock reference circuit is generally 13MHZ, on the one hand clock reference frequency synthesizer circuit, on the other hand to the work clock logic circuit. Shenzhen Gionee Communication Co., Ltd. - Jinming electron emission part of a transmitter circuit: GSMK modulation 270kbit / s), formed to launch the I and Q signals sent by the baseband part of the TDMA frame data stream (rate, and then sent the letter on the inverter modulation emission band, power amplifier combiner antenna. Shenzhen Gionee Communication Co., Ltd. - Jinming electron emission part of the two frequency synthesizer frequency conversion necessary to transmit and receive local oscillator signal, the phase-locked loop to stabilize the frequency from the clock reference circuit for frequency reference. Respectively adjust the other three frequency channels of the detector of mobile phone jammer intelligent system.Shenzhen Gionee Communication Co., Ltd.

- Jinming electron emission part of the transmitter circuit including modulation, bandpass filtering, transmit mixer, transmit voltage-controlled oscillator VCO, power amplifier power control circuit, it will be the analog baseband signal is upconverted to 880 ~ 915MHZ or 1710 ~ 1785MHZ high-frequency signal, and the power amplifier from the antenna out. Shenzhen Gionee Communication Co.