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A negative‐impedance‐converter circuit for higher frequencies
Author(s) -
Atiya F. S.,
ElShiekh M. N.
Publication year - 1977
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.4490050211
Subject(s) - capacitor , negative impedance converter , electrical impedance , transistor , compensation (psychology) , capacitance , electrical engineering , constant (computer programming) , materials science , rlc circuit , electronic engineering , physics , engineering , boost converter , computer science , voltage , electrode , psychology , quantum mechanics , psychoanalysis , programming language
The main weakness of the Yanagisawa negative‐impedance‐converter circuit is the large phase shift of its current conversion gain h 21 at higher frequencies. The reason for this phase shift is the collector capacitances of the two transistors. The addition is suggested here of a capacitor that balances out the effect of these capacitances as far as h 21 is concerned. A real and constant h 21 results, up to higher frequencies. Another capacitor compensates for the effect of the transistor capacitances on h 22 . The remaining two h parameters need no such compensation. Experimental results confirm all these conclusions.