TELKOMNIKA Telecommunication Computing Electronics and Control
Design and performance analysis of low phase noise LC-voltage controlled oscillator

TELKOMNIKA Telecommunication Computing Electronics and Control
Design and performance analysis of low phase noise LC-voltage controlled oscillator

Figure of merit
Low phase noise
MOS varactor
Tuning range
Voltage controlled oscillator

Voltage controlled oscillator (VCO) offers the radio frequency (RF) system
designer a freedom to select the required frequency. Today’s wireless
communication system imposes a very stringent requirement in terms of
phase noise generated in VCO. This study presents an inductive source
degeneration technique to improve the phase noise performance of the
inductance-capacitance (LC)-VCO. Double cross-coupled topology has been
chosen for the proposed VCO. The post layout simulations with the parasitic
resistance, inductance, capacitance (RLC) extracted view is carried out with
united microelectronics corporations (UMC) 0.18 μm process by spectre
simulator of cadence tools. The proposed VCO provides a phase noise
of -124.3 dBc/Hz @ 1 MHz. The tuning range obtained is 19.87% with a
centre frequency of 2.46 GHz which makes it suitable for industrial,
scientific, and medical (ISM) band applications. It consumes a power of
2.10 mW. Also, a good figure of merit of -189 is achieved. The total layout
area occupied is 477×545 μm2
.

Ramchandra Gurjar, Deepak Kumar Mishra

http://telkomnika.uad.ac.id

Oct 26, 2022

PERI IRAWAN

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