公开(公告)号：US06433604B1

公开(公告)日：2002-08-13

申请号：US09745518

申请日：2000-12-22

申请人： Shinji Koizumi ,  Masakazu Asakawa

发明人： Shinji Koizumi ,  Masakazu Asakawa

IPC分类号： H03H1116

摘要： An adjustment technique allowing easy adjustment of a phase shifter is disclosed. A programmable device (PLD) is connected to the phase shifter so as to correct a standard vector depending on correction data written thereto. When supplying a standard input signal to the phase shifter, the phase and amplitude of the output signal are measured. A standard vector for a sequentially selected one of a plurality of phase points is generated and outputted to the phase shifter. Correction data for a selected phase point is calculated based on the measured phase and amplitude. A VHDL source program is generated from the corrected data for all the phase points to write the correction data into the PLD.