Linearly Tunable Transconductor Using Modified CDBA

Authors:
Ali Zeki;Ali Toker;Serdar Özo uz
Affiliations:
Istanbul Technical University, Faculty of Electrical and Electronics Eng., Electronics and Communication Eng. Dept., 80626-Maslak, stanbul, Turkey Phone: +90-212-285 36 48 Fax: +90-21 ...;Istanbul Technical University, Faculty of Electrical and Electronics Eng., Electronics and Communication Eng. Dept., 80626-Maslak, stanbul, Turkey Phone: +90-212-285 36 48 Fax: +90-21 ...;Istanbul Technical University, Faculty of Electrical and Electronics Eng., Electronics and Communication Eng. Dept., 80626-Maslak, stanbul, Turkey Phone: +90-212-285 36 48 Fax: +90-21 ...
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2001

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Abstract

With a slight modification in current differencing buffered amplifier (CDBA), a new block, namely differential-input current feedback amplifier (DFCA), is obtained. It is shown that, with two additional MOSFETs, this modified CDBA structure can be utilized as a linearly tunable transconductor, which can also be converted to a variable-gain amplifier or an analogue multiplier.