Electronically Adjustable Multiphase Sinusoidal Oscillator with High-Output Impedance at Output Current Nodes Using VDCCs

This paper presents the high-output-impedance current-mode multiphase sinusoidal oscillators (MSO) using voltage differencing current conveyor (VDCC)-based lossy integrators, which consist of one VDCC, grounded capacitor, and two resistors. The proposed oscillator can provide an odd-phase even-phase system without use additional amplifier. frequency oscillation (FO) is electronically tuned via bias affecting condition (CO). designed to obtain three-phase waveforms (n = 3). effect non-idealities VDCC on integrator section also investigated. validity circuit demonstrated by PSPICE simulation 0.18 µm TSMC CMOS process parameters with ±0.9V power supply. obtained from 1.43 MHz. total harmonic distortions output currents IO1, IO2, IO2 are 1.22%, 1.18%, 0.57%. IO1–IO2 IO2–IO3 phase differences approximately 121 119 degrees, respectively. feasibility MSO verified experimental results constructed commercially available ICs (LT1288 AD844) ±5 V simulations experiments closely consistent theoretical expectation.