| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter circuit capable of easily obtaining an appropriate filter characteristic.SOLUTION: A filter circuit 3 outputs a filtered signal by performing filtering process for a pulse signal. The filter circuit 3 includes a processing part 11, having a delay element 11a for performing delay process on the pulse signal and having a phase shifter 11b for performing phase shift process on the pulse signal, for outputting a processed signal obtained by performing the delay process and the phase shift process on the pulse signal, and a power synthesizer 12 for outputting a synthesized signal of the pulse signal and the processed signal, as a filtered signal. The delay element 11a and the phase shifter 11b are configured so that a notch frequency position, appearing on frequency domain of the filtered signal can be adjusted by adjusting an amount of delay at the delay process and an amount of phase shift at the phase shift process.SELECTED DRAWING: Figure 2 |
