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CMOS Active Inductor/Resonator Based Voltage Controlled Oscillator

Author(s):

Dhara P Patel* and Shruti Oza-Rahurkar   Pages 1 - 7 ( 7 )

Abstract:


Objective: A tunable CMOS active inductor/resonator based Voltage Controlled Oscillator (VCO) has been presented. In the design of LC-VCO, LC resonator (tank) circuit has been substituted with gyrator based CMOS active inductor/resonator. The purity of VCO output signal is defined by the phase noise parameter. Methods: For good spectral purity of VCO output signal, the phase noise should be minimum. Moreover, the quality factor of LC resonator is inversely proportional to the phase noise of VCO output signal. In the presented work, a high-quality active inductor/resonator circuit has been used to design VCO which minimizes the phase noise and chip area as well. Further, other VCO characterization factors are measured. Result: The designed circuit has been implemented in 0.18!! CMOS technology.

Keywords:

Active Inductor (AI), Phase noise, Quality factor, Voltage Controlled Oscillator (VCO), Widlar current source

Affiliation:

Department of Electronics and Communication Engineering, Faculty of Technology, Charotar University of Science and Technology, Changa-388421, Anand, Gujarat, Department of Electronics and Telecommunication, Bharati Vidyapeeth College of Engineering, Pune, Maharastra-411046



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