Phase noise analysis for a mm-wave VCO configuration

SiGe based Multiple-phase VCO Operating for mm-Wave Frequencies

A Wideband Low-Phase-Noise CMOS VCO

A CMOS VCO has been designed and fabricated in a commercial 0.25 m CMOS process. Using a combination of switched binary-weighted capacitors and standard varactors, this VCO achieves a 28% tuning range with a control voltage ranging from 0-2 V, while maintaining a tuning sensitivity of less than 75 MHz/V over its entire frequency range. Compact choke inductors are used in place of resistors to p...

Phase noise analysis in CMOS LC Quadrature VCO

Shuguang Han , Baoyong Chi and Zhihua Wang Department of Electronic Engineering, Tsinghua University, Beijing 100084, P. R. China Institute of Microelectronics, Tsinghua University, Beijing 100084, P. R. China 2 Abstract: Based on a physical understanding of phase noise mechanisms in CMOS LC Quadrature voltage-controlled oscillator (QVCO), a quantitative analysis of phase noise in QVCO is devel...

Phase noise in a back-gate biased low-voltage VCO

The phase noise in an ultra low-power and low-voltage CMOS voltage controlled oscillator (VCO) has been measured and modelled for supply voltage VDD from 1.8 V down to 80 mV with various body bias voltages V B ~ The VCO is a fully integrated ring oscillator designed in a 0.18pm CMOS technology. In this design, the frequency can be controlled by VBp The effects of scaling VDD together with the e...

Low-phase-noise Cmos Vco with Harmonically Tuned Lc Tank

A low-phase-noise voltage-controlled oscillator (VCO) has been demonstrated using a harmonically tuned LC resonance tank. In this circuit configuration, the voltage shape at the differential cell is almost rectangular; thus, the cell is switched effectively and the phase noise is reduced. More importantly, the proposed tank suppresses downconversion of the noise around 2f0 to the phase noise, d...