DIGITAL BROADBAND SIGNAL PROCESSING SYSTEM USING THE HYBRID CONVERSION METHOD

摘要

A digital broadband signal processing system using a hybrid conversion method is provided to improve an electrical property and an image signal eliminating characteristic of the system by using single frequency component. A dual conversion part(100) has a gain control member controlling a gain of a broadband signal, a first oscillator(120) generating a first variable oscillation frequency and a first mixer(130) mixing the first variable oscillation frequencies to covert the broadband signal into an intermediate frequency signal. A direction conversion part(200) a second oscillator(210) generating a second variable oscillation frequency, a phase shifting member(220) shifting a phase of the second variable oscillation frequency, second and third mixers(230A,230B), and first and second low pass filters(240A,240B) filtering the signals output from the second and the third mixers.