CAJ | 학술논문

低通滤波器是DDS信号发生器的重要组成部分，其性能的优劣直接影响整个信号发生器的技术指标。使用一种全新的归一法，为DDS信号发生器设计了一个截止频率为120 MHz的7阶椭圆型低通滤波器，并使用Multisim10仿真软件对其进行仿真，仿真结果表明该滤波器幅频特性良好，可以达到预期的指标。
저통려파기시DDS신호발생기적중요조성부분，기성능적우렬직접영향정개신호발생기적기술지표。사용일충전신적귀일법，위DDS신호발생기설계료일개절지빈솔위120 MHz적7계타원형저통려파기，병사용Multisim10방진연건대기진행방진，방진결과표명해려파기폭빈특성량호，가이체도예기적지표。
Low-pass filter is an important part of the DDS signal generator,whose performance directly affects the technical indicators of the whole signal generator. This paper introduces a 7th order low-pass elliptic filter with the cut-off frequency of 120 MHz for the DDS signal generator with a new normalization method. Multisim10 simulation shows that it has a good phase frequency characteristic and it can achieve the desired targets.