Single active element based mixed-mode quadrature oscillator using grounded components

Abstract

The paper presents a mixed mode quadrature oscillator (MMQO) using single active element and all grounded passive components. The proposed circuit employs single DD-DXCCII, three grounded resistors and two grounded capacitors. The proposed quadrature oscillator provides three quadrature voltage outputs and two quadrature current outputs simultaneously so called mixed mode quadrature oscillator. In the proposed mixed mode quadrature oscillator the frequency of oscillation and condition of oscillation are independent. Effects of non-idealities and parasitic study are also analyzed. The proposed circuit has low active and passive sensitivities. In addition, a resistorless realization of the proposed work is also given. PSPICE simulations using 0.18μm CMOS process parameters confirm the validity and practical utility of the proposed circuit.

Keywords

• Mixed-mode, DD-DXCCII, Quadrature oscillator

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