Current or/and voltage-mode quadrature oscillators with grounded capacitors and resistors using FDCCIIs

Authors:
Jiun-Wei Horng;Chun-Li Hou;Chun-Ming Chang;Shih-Ting Cheng;Hsin-Yu Su
Affiliations:
Department of Electronic Engineering, Chung Yuan Christian University, Chung-Li, Taiwan;Department of Electronic Engineering, Chung Yuan Christian University, Chung-Li, Taiwan;Department of Electrical Engineering, Chung Yuan Christian University, Chung-Li, Taiwan;Department of Electronic Engineering, Chung Yuan Christian University, Chung-Li, Taiwan;Department of Electronic Engineering, Chung Yuan Christian University, Chung-Li, Taiwan
Venue:
WSEAS Transactions on Circuits and Systems
Year:
2008

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Abstract

Two quadrature oscillator circuits each using one fully differential second-generation current conveyor (FDCCII), two grounded capacitors and two grounded resistors are presented. The current-mode quadrature signals can be obtained from the first proposed circuit. The current-mode and voltage-mode quadrature signals can be simultaneously obtained from the second proposed circuit. In both proposed circuits, the current-mode quadrature signals have the advantage of high output impedance. The oscillation conditions and oscillation frequencies are orthogonal controllable. The use of only grounded capacitors and resistors makes the proposed circuits ideal for integrated circuit implementation. Simulation results are included.