| 摘要 |
PROBLEM TO BE SOLVED: To provide a band pass filter which can suppress the deterioration of attenuation, by making unnecessary a duty conversion circuit.SOLUTION: A 4-phase band pass filter includes: a load element 12 which converts an input current signal into an output voltage signal; an impedance element group 14 including four impedance elements Z141-Z144; and four switch groups 131-134. The switch groups 131-134 include four switches SW1311-SW1314, switches SW1321-SW1324, switches SW1331-SW1334 and switches SW1341-SW1344, respectively. The connection/non-connection of the switch SW1311, the switch SW1342 etc. is controlled by clocks LO1-LO8. |
