| 摘要 |
PURPOSE:To improve an S/N ratio by obtaining high resolution for a high signal frequency component, by composing one transversal filter of less stages of transversal filters. CONSTITUTION:Shift registers 13 operate with a clock having the sampling frequency FS of an input signal Vin. Transversal filters 4 and 6 are composed of only the 2K(K: integer)-th weighting function of a filter to be realized, and transversal filters 5 and 7 are composed of only the (2K-1)-th weighting function. The filters 4 and 6, and 5 and 7 operate with a clock of a frequency FS/2, and their addition output is sent out as an output Vout through a switch 10 switching with a clock of a frequency fS. |
