By high-frequency circuit frequency spectrum linear removal
Yan Mao
0301 Electron
Abstract:In the high-frequency circuit frequency spectrum linear removal the most common mixer is the transistor mixer, the input signal is big for the useful signal and the candid signal generally speaking candid signal, the useful signal peak-to-peak value is small. Speaking of the useful signal, the mixer may regard as when the linearity then the electric circuit, may when then the parameter small signal model carries on the analysis.Using simulates the realization mixing which the multiplier the multiplication characteristic can facilitate. Can have suppression disturbance and so on combination frequencies disturbance, beat interference, intermodulation interference in the mixing process main methods is enhances the initial segment the selectivity, as well as adjustment mixer active status and authentic choice bias, signal voltage and candid voltage size.
Keywords: Electric circuit; mixer principle and electric circuit;mixer