Raj Senani Vinod Kumar Singh Abdhesh K. Singh Data Ram Bhaskar Novel electronically controllable current-mode universal biquad filter. 410-415 2004 1 IEICE Electronic Express 14 http://joi.jlc.jst.go.jp/JST.JSTAGE/elex/1.410 db/journals/ieiceee/ieiceee1.html#SenaniSSB04