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Current‐mode multiple‐loop feedback filters using dual‐output OTAs and grounded capacitors
Author(s) -
SUN YICHUANG,
FIDLER J. K.
Publication year - 1997
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/(sici)1097-007x(199703/04)25:2<69::aid-cta950>3.0.co;2-9
Subject(s) - integrator , transconductance , operational amplifier , capacitor , sensitivity (control systems) , feedback loop , network analysis , dual (grammatical number) , control theory (sociology) , dual loop , loop (graph theory) , operational transconductance amplifier , electronic engineering , computer science , topology (electrical circuits) , amplifier , engineering , mathematics , electrical engineering , voltage , bandwidth (computing) , telecommunications , art , computer security , cmos , transistor , artificial intelligence , literature , control (management) , combinatorics
A systematic method is presented for the generation, analysis and synthesis of current‐mode continuous‐time multiple‐integrator‐loop all‐pole filters using dual‐output operational transconductance amplifiers and grounded capacitors (DO‐OTA‐GC). The general theory based on a multiple‐loop feedback model is formulated. A number of architectures including canonical realizations are developed, with particular emphasis on high‐order configurations. A sensitivity analysis method is also given and parasitic effects on the structures are discussed. The general formulations are verified by direct analysis of the generated individual circuits. Design examples are also presented. © 1997 by John Wiley & Sons Ltd.