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Z Copy‐Controlled Gain‐Current Differencing Buffered Amplifier and its applications
Author(s) -
Biolek Dalibor,
Bajer Josef,
Biolková Viera,
Kolka Zdeněk,
Kubíček Michal
Publication year - 2011
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.632
Subject(s) - amplifier , electronic circuit , current (fluid) , output impedance , filter (signal processing) , electrical impedance , buffer amplifier , voltage , computer science , electronic engineering , electrical engineering , cmos , engineering
The Z Copy‐Controlled Gain‐Current Differencing Buffered Amplifier (ZC‐CG‐CDBA) is introduced in the paper. In addition to the well‐known CDBA, the input Current Differencing Unit (CDU) is modified and completed by special circuits. Analogously to the conventional CDBA, the z terminal is internally connected to the input of voltage buffer. The current gain from the difference input p, n to the output z can be controlled electronically or by an external device. In addition, an independent high‐impedance output zc is available, providing difference current I p − I n . In the paper, the extension of application range of the ZC‐CG‐CDBA compared with the conventional CDBA is referred to. The novel circuit element is assembled from commercial integrated circuits and its principle is verified experimentally on a universal second‐order filter. Copyright © 2010 John Wiley & Sons, Ltd.