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Quadrature Oscillators with Grounded Capacitors and Resistors Using FDCCIIs
Jiun-Wei Horng,Chun-Li Hou,Chun-Ming Chang,Hung-Pin Chou,Chun-Ta Lin,Yao-Hsin Wen 한국전자통신연구원 2006 ETRI Journal Vol.28 No.4
Two current-mode and/or voltage-mode quadrature oscillator circuits each using one fully-differential secondgeneration current conveyor (FDCCII), two grounded capacitors, and two (or three) grounded resistors are presented. In the proposed circuits, the current-mode quadrature signals have the advantage of high-output impedance. The oscillation conditions and oscillation frequencies are orthogonally (or independently) controllable. The current-mode and voltage-mode quadrature signals can be simultaneously obtained from the second proposed circuit. The use of only grounded capacitors and resistors makes the proposed circuits ideal for integrated circuit implementation. Simulation results are also included.