A Positive Type DVCC-Based Universal Biquad

Abstract

: This paper presents a current-mode universal biquad employing only positive type DVCCs (differential voltage current conveyors). The circuit enables LP (low-pass), BP (band-pass), HP (high-pass), BS (band-stop) and AP (all-pass) responses by the selection and addition of the input and output currents without any component matching constraints. Moreover the circuit parameters ω 0 and Q can be set orthogonally adjusting the circuit components. A design example is given together with simulation results by PSPICE.