Synthesis of Leap-Frog Multiple-Loop Feedback OTA-C Filters

Author

Sun, Yichuang

Author_Institution

Sch. of Electron., Commun. & Electr. Eng., Hertfordshire Univ., Hatfield

Volume

53

Issue

9

fYear

2006

Firstpage

961

Lastpage

965

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;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2006.879095

Filename

1705075