Title :
Synthesis of Leap-Frog Multiple-Loop Feedback OTA-C Filters
Author_Institution :
Sch. of Electron., Commun. & Electr. Eng., Hertfordshire Univ., Hatfield
Abstract :
Operational transconductance amplifier and capacitor filters based on the leap-frog (LF) structure are studied from the viewpoint of multiple-loop feedback (MLF) and coefficient matching. The LF configuration is obtained from an MLF model, which has the minimum number of components and only grounded capacitors. Explicit and iterative design formulas are derived for the synthesis of arbitrary filter characteristics. All-pole filters are realized using the basic LF structure, and filters with arbitrary transmission zeros are synthesized by adding the input distributor or output summer
Keywords :
active filters; circuit feedback; continuous time filters; network synthesis; operational amplifiers; poles and zeros; active filters; all-pole filters; capacitor filters; continuous-time filters; grounded capacitors; leap-frog structure; multiple-loop feedback; operational transconductance amplifier; transmission zero; Active filters; Capacitors; Circuit simulation; Circuit synthesis; Feedback; Filtering theory; Matched filters; Operational amplifiers; Parasitic capacitance; Transconductance; Active filters; analog circuits; continuous-time filters; operational transconductance amplifier and capacitor (OTA-C) filters;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.879095
