Design of new digital phase shifters
Wang Rong-bo · Jisuanji gongcheng yu sheji · 2006
The basic theory of direct digital frequency synthesis(DDS) phase-shifter is introduced.The signal frequency for DDS is limited.Two new digital phase shifters are put forward to solve the problem.One is modified DDS,and the other is trigonometric functions synthesis.The resolution of phase is increased by modified DDS.Furthermore,the second expands the bandwidth of phase-shift signal with high resolution in phase.