Abstract
In this paper a new low voltage mixed-mode multiphase quadrature oscillator employing a single fully differential second generation current conveyor, two resistors and two grounded capacitors is proposed. The proposed circuit provides two quadrature voltage outputs and three quadrature current outputs simultaneously. In addition, the proposed circuit has been made load insensitive so that it is capable of providing high output impedance current outputs without using additional current followers. Moreover, the proposed circuit of load insensitive quadrature oscillator provides four phase current outputs and two voltage outputs, simultaneously. Non ideal study is also included. Both the proposed circuits enjoy low active and passive sensitivities. This paper further presents an active-C multiphase oscillator with a single FDCCII and two grounded capacitors. The proposed structures are suitable for low voltage applications. Simulation results using PSPICE program on cadence tool are included.
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