A low-noise and low-power voltage-controlled oscillator

This paper presents a low-noise low-power voltagecontrolled oscillator (VCO). The power consumption of the VCO is reduced by eliminating the redundant current flowing through the cross-coupled latch. The phase noise is also reduced by minimizing signal transition period in which noise current has critical impact on the phase noise. The proposed VCO is implemented in a 65-nm CMOS technology, whose evaluation results indicate that the proposed VCO operates from 982MHz to 1.64GHz with up to 34% less power consumption and up to 1.93 dBc/ Hz less phase noise as compared to the conventional lownoise VCO.