Construction of new china cell phone jammer factory building is in the process

Panasonic GD90 cell phone reception and launch of the first mixer to be used to RXVCO conversion circuit signal, and RXVCO circuit module provided by the U302. U302 module can work in GSM mode or DCS mode, the band switching control signals DCS-GSM work through the Q301 circuit to U302 in the corresponding mode. U302 pin 1 is signal output; 3 feet is the band switching control terminal; 5 feet is the control side; 7 feet is the power supply side. When the U302 work on the GSM frequency band, from 1 foot produce 1160 ~ 1185MHz, a local oscillator signal. When the U302 working in DCS band, the heavier the foot produces 1580 - 1665MHz, a local oscillator signal. Construction of new  china cell phone jammer factory building is in the process.
U302's output is divided into two: 39 feet all the way to the U101 as the output signal; another way to 13 feet for the phase-locked loop U301 sampling signal. The signal is divided in U301 and compared with the reference clock signal, the voltage control signal to be 9 feet from the U301 output signal through the resistor R302, R303 and R304 and capacitor C311 and other form of low-pass filter circuit to the U302's 5 feet, by changing the U302 in both ends of the varactor reverse bias, the output frequency to control U302. When the logic circuit by SYNEN, SYNDATA, SYNCLK U301 in three lines to change the divider ratios, U301 9-pin voltage changed, U302's output frequency is also changed, to channel conversion purposes. The  cell phone jammer company decides to hold the ribbon –cutting ceremony.
For the second inverter circuit superheterodyne receiver circuit: two oscillator VCO frequency synthesizer main role is to produce two vibration signals sent to the receiver two mixer circuit, mixer circuit and receiving two input IF signal in a mixed frequency, resulting in two intermediate frequency signals. An inverter circuit for superheterodyne receiver circuit: two oscillator VCO frequency synthesizer main role is to produce two vibration signal to the receiver demodulation circuit to demodulate the RXI / Q signals. The following Panasonic GD90 cell phone the second local oscillator circuit as an example, the circuit shown in Figure 4-30. Two oscillator VCO circuit (1FVCO) provided by the VCO module components U303, U303 pin 1 is signal output control terminal is 5 feet, feet is the power side. U303 will have a 540MHz circuit of two oscillator signals. The new factory building of  cell phone jammer company will hold the foundation stone laying ceremony.