Finding all elementary circuits exploiting transconductance

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    Commonly used elementary circuits like single-transistor amplifier stages, the differential pair, and current mirrors basically exploit the transconductance property of transistors. This paper aims at finding all elementary transconductance-based circuits. For this purpose, all graphs of two-port circuits with one or two voltage controlled current sources are generated systematically. This results in 150 graphs of "finite transactance two-port circuits" with at least one nonzero transmission parameter. Each of them can be implemented in various ways using transistors and resistors, covering many commonly required types of two-ports. To illustrate the usefulness of the technique several alternative circuit implementations for current amplifiers and voltage followers are generated. A new wide-band low-noise amplifier generated with the technique was realized in 0.35-?m CMOS.
    Original languageEnglish
    Pages (from-to)1039-1053
    Number of pages15
    JournalIEEE transactions on circuits and systems
    Issue number11
    Publication statusPublished - Nov 2001


    • Computer Aided Design
    • circuit synthesis
    • circuittopology
    • systematic circuit generation
    • transconductor
    • voltage-controlled current source
    • EWI-14346
    • METIS-205988
    • IR-43145
    • Analog circuit design


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