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Realization of tunable RC ‐active oscillators using grounded capacitors and voltage amplifiers
Author(s) -
Bhattacharyya B. B.,
Sundaramurthy M.,
Swamy M. N. S.
Publication year - 1980
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/cta.4490080403
Subject(s) - capacitor , realization (probability) , resistor , operational amplifier , amplifier , voltage , electronic circuit , constraint (computer aided design) , set (abstract data type) , control theory (sociology) , electronic engineering , topology (electrical circuits) , computer science , electrical engineering , engineering , mathematics , cmos , control (management) , mechanical engineering , statistics , artificial intelligence , programming language
A systematic procedure is given to generate a set of tunable RC oscillators, each using two finite gain voltage controlled voltage sources, three resistors and two grounded capacitors. These realizations are shown to be minimal with respect to passive and active elements under the constraint that (one end of) all the capacitors remain grounded. The set consists of four oscillators and is shown to be complete, that is, no additional oscillator circuit can be generated under the given assumptions. A simple approach is then introduced for testing the structures for latch up behaviour. This approach also suggests a way of redesigning the oscillator circuits to render them free of latch up problems, if they exist. Experimental results are found to be in good agreement with the theory.