Single DV-DXCCII Based Voltage Controlled First Order All-pass Filter with Inverting and Non-inverting responses

Abstract

In this paper, a new voltage controlled first order all-pass filter is presented. The proposed circuit employs a single Differential Voltage Dual-X second generation Current Conveyor (DV-DXCCII), a NMOS (n-type Metal Oxide Semiconductor) transistor operated in the triode region as an active resistor and a grounded capacitor. The proposed all-pass filter provides both inverting and non inverting voltage-mode outputs simultaneously from the same configuration without any matching constraint. Non-ideal analysis along with sensitivity analysis is investigated. The proposed circuit has low active and passive sensitivities. The Monte Carlo analysis is also done for showing good sensitivity performances of the proposed circuit. In addition, to utilize the feature of cascadability, an application of higher order filter is also given. Moreover, the use of grounded capacitor makes the proposed circuit particularly attractive for Integrated Circuit (IC) implementation point of view. The theoretical results are validated through PSPICE simulations with TSMC 0.18 μm Complementary Metal Oxide Semiconductor (CMOS) process parameters.