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by a single-phase network enhancements quadrature accuracy. In a quadrature mixer, along the oscillation signal and multiplied by the I channel signal of IBBP, IBBN fed, the other way 90 ° phase difference of the oscillation signal, and by QBBP, QBBN fed Q channel signals are multiplied. The two quadrature mixer output by the differential of a single converter output impedance 50 O. The input IBBP, IBBN, QBBP, QBBN through voltage-to-current converter, the baseband voltage signal into a current, and then fed into the mixer.the bias circuit is set so that each channel in the bias voltage of about 1.2 V. 4.2 AD8346 IF modulator module According to the the IF modulated block diagram of the Figure 2, in the general communication signal generator IF modulation module, In the design, the quadrature modulator AD8346 is compatible with the dual-channel D / A converter AD976l able to meet the design requirements of quadrature modulation.The circuit, in order to reduce the additional input signal loss, For this reason, the use of the 2.43O resistor its accuracy should be 0.1% or higher, the role of the bias circuit and the AC coupling circuit allows A: D8346 Get 2 V peak-to-peak differential signal input from AD9761, basic voltage loss. AD976l AD8346 with the computer software to generate the baseband I, O serial data generation center frequency of the periphery of the RF modulation of the predetermined frequency signal, which is connected in Figure 4 below. Notebook battery the analog signal is fed after the AC coupled circuit of the resistors and capacitors constituting the quadrature modulator AD8346, in which LOIP LOIN fed into the local oscillation signal quadrature multiplied, and finally multiplies the orthogonal two signal synthesizing signal modulated at the local oscillator frequency has been withered. Lenovo IdeaPad u350 battery Panasonic CF-VZSU29asu battery Panasonic CF-VZSU48 battery Panasonic CF-VZSU48u battery
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