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Turkish Journal of Electrical Engineering and Computer Sciences

DOI

10.3906/elk-0904-11

Abstract

In this paper, a new square-root domain, first order, all-pass filter based on the MOSFET square law is presented. The proposed filter is designed by using nonlinear mapping on the state variables of a state space description of the transfer function. To the best knowledge of the authors, the filter is the first square-root domain first order all-pass structure designed by using state space synthesis method in the literature. The center frequency of the all-pass filter is not only attainable at megahertz frequencies but also tunable by an external bias current. The proposed filter operated 2.5 V supply voltage is constructed by current mirrors, geometric mean circuits, a linear transconductor circuit, and a capacitor. SPICE simulations are given to approve the theoretical analysis.

First Page

141

Last Page

146

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