Patent ID: 8710920

Claim:
A charge domain filter (CDF), comprising: an amplifier, comprising a first output terminal and a second output terminal; at least one first switch-capacitor network (SCN), comprising an input terminal coupled to the first output terminal of the amplifier; at least one second SCN, comprising an input terminal coupled to the second output terminal of the amplifier; at least one third SCN, wherein an input terminal of the third SCN is coupled to an output terminal of the first SCN, an output terminal of the third SCN is coupled to an output terminal of the second SCN, and a mode control terminal of the third SCN receives a first mode signal to set an impulse response mode of the third SCN; and at least one fourth SCN, wherein an input terminal of the fourth SCN is coupled to the output terminal of the second SCN, an output terminal of the fourth SCN is coupled to the output terminal of the first SCN, and a mode control terminal of the fourth SCN receives a second mode signal to set an impulse response mode of the fourth SCN.