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A Low-Power Ring Voltage-Controlled Oscillator with MOS Resistor Tuning for Wireless Application

  • Dileep DwivediEmail author
  • Manoj Kumar
Conference paper
  • 5 Downloads
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 1164)

Abstract

A low-power, single-output ring voltage-controlled oscillator (VCO) has been presented in this paper. Circuit diagram for proposed VCO is designed in 0.18 μm CMOS process. For proposed ring VCO, a controllable delay cell has been implemented that consists of a three transistors NAND gate inverter with MOS resistive tuning element. Resistance variation of MOS transistors has been utilized to tune the frequency of the proposed VCO. Result shows that the proposed VCO operates from 1.251 to 1.884 GHz with the deviation in control voltage (VCT) from 0.6 to −0.6 V across the MOS transistors P3 and N2 with 1.8 V supply voltage (Vdd). Impact of Vdd variation on oscillation frequency also has been observed with different values of VCT. A tunable range of frequency has been obtained from 1.251 to 2.897 GHz with change in Vdd from 1.8 to 3 V for positive value of VCT. Further, output frequency shows variation from 1.795 to 2.943 GHz with change in Vdd from 1.8 to 3.0 V for negative value of VCT. The proposed VCO shows a phase noise of −91.77 dBc/Hz @1 MHz offset from carrier frequency with power consumption of 0.248 mW at 1.8 V Vdd. Figure of merit (FoM) of the proposed VCO is 162 dBc/Hz.

Keywords

CMOS Low power MOS resistance Phase noise VCO 

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Copyright information

© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021

Authors and Affiliations

  1. 1.University School of Information, Communication and Technology, Guru Gobind Singh Indraprastha UniversityNew DelhiIndia

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