... 1dB12341112121,01,30222,2 156 0 ,54 422 ,59 040,303901 ,55 15 01,2 057 4,13011,16971,01,00, 451 1, 353 0 ,54 01,4170,982,020,783 ,56 ChebyshevSuy giảm 3dB12341112121,01,0 650 3,34960, 355 92,1 853 0,196401,93 05 01,1923 5, 53391,20091,01,00,2991,3960 ,55 71,4101,33,071,08 5, 58 ... hạn12341112121,01,28720 ,50 891,01970,87000,870000,414200, 259 90,18920,18921,01,01,9611,2621,4801,4800 ,5 0 ,5 0 ,5 0 ,5 Bessel 12341112121,01,36170, 756 00,99961,33970,774300,618000,47720,48890,38901,01,01,3231,4140,9781,7970 ,58 0,690 ,52 0,81Butterworth ... 3dB12341112121,01,0 650 3,34960, 355 92,1 853 0,196401,93 05 01,1923 5, 53391,20091,01,00,2991,3960 ,55 71,4101,33,071,08 5, 58 Từ công thức tổng quát của mạch lọc tần thấp sẽ biến thành...