Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/02/01 Vol. E86-ANo. 2pp. 318-326 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics) Category: Keyword: current differencing buffered amplifier, CDBA, low-voltage circuit, leapfrog filter, active filter,