Evaluation of phase noise performance of voltage-controlled integrated inductors and active inductors with 0.18 µm CMOS technology

Subject Areas : Electronics Engineering

najmeh cheraghi shirazi ¹ , Roozbeh Hamzehyan ²

1 - department of electrical engineering, bushehr branch, islamic azad university, bushehr, iran
2 - department of electrical engineering, bushehr branch, islamic azad university, bushehr, iran

Received: 2021-05-21 Accepted : 2021-05-21 Published : 2017-11-22

Keywords:

Abstract :

A CMOS voltage controlled oscillator with a wide adjustment range is designed to operate at radio frequencies. The main advantage of this structure is the use of an active inductor. Hence the chip surface is significantly reduced. The active inductor and varactor capacitor in the proposed VCO circuit is used for frequency settings. The results of the measurements using the 0.18 µm CMOS process show phase noise -79.85dBc and amplitude noise -126.9dBm in the 1MHz offset. Also, using the S parameter, the central frequency value for this 3GHz circuit is obtained.