Title :
Synthesizing switched-current filters by transposing the SFG of switched-capacitor filter circuits
Author :
Roberts, G.W. ; Sedra, A.S.
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
fDate :
3/1/1991 12:00:00 AM
Abstract :
A general synthesis method for switched-current (SI) filter circuits is presented. The SI filter circuit is obtained from the transpose of the signal-flow-graph (SFG) representation of a switched-capacitor (SC) filter realization. The resulting SI circuits realized the same transfer function as the SC filter circuit and, in addition, possess identical component sensitivities. Since the operation of SFG transposition is sensitivity preserving, application of the proposed method to low-sensitivity SC filter circuits will produce low-sensitivity SI filter circuits
Keywords :
active filters; graph theory; network synthesis; switched filters; SC filter circuits; SFG transposition; SI filter circuit; low sensitivity circuits; sensitivity preserving; signal-flow-graph; switched-capacitor filter; switched-current filters; synthesis method; transfer function; CMOS process; Capacitors; Circuit synthesis; Digital filters; Digital signal processing; Operational amplifiers; Signal synthesis; Switches; Switching circuits; Voltage;
Journal_Title :
Circuits and Systems, IEEE Transactions on
