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A very compact KHN filter with multidecade tuning

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3 Author(s)
Muniz-Montero, C. ; Electron. Depts., Nat. Inst. for Astrophys. Opt. & Electron., Puebla ; Diaz-Sanchez, A. ; Gonzalez-Carvajal, R.

A very compact implementation of a multifunction Kerwin Huelsman Newcomb (KHN) filter that can be frequency tuned almost seven decades, from 0.2 Hz to 1 Mhz, is presented. Tuning is achieved by means of high-value, programmable active resistors biased using the quasi floating gate (QFG) technique and linearisated through capacitive gate voltage averaging. The circuit, realized in a 0.5 mum standard CMOS technology using only four CMOS inverters, six small capacitors, six small resistors and two programmable active resistors, occupies a total area of 0.02 mm2, dissipates 3.45 mW and presents a dynamic range at 0.1 % THD of 55.86.

Published in:

Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on

Date of Conference:

27-30 Aug. 2007

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