This paper presents a relative study among two Ring oscillators architecture (CMOS, NMOS) and current-starved
Voltage-controlled oscillator (CS-VCO) on the basis of different parameters like power dissipation ,phase noise etc. All the
design has been done in 45- nm CMOS technology node and 2.3 GHz Centre frequency have been taken for the comparison
because of their applications in AV Devices and Radio control. An inherent idea of the given performance parameters has been
realize by thecomparative study. The comparative data shows that NMOS based Ring oscillator is good option in terms of the
phase noise performance.
