Name
Title | ||
|---|---|---|
An LC Quadrature VCO Using Capacitive Source Degeneration Coupling to Eliminate Bi-Modal Oscillation |
Abstract | ||
|---|---|---|
A phase shift technique using capacitive source degeneration (CSD) is presented for LC quadrature voltage-controlled oscillators (QVCO), where capacitively degenerated differential pairs are used to couple the LC tanks to implement a phase-shifted transconductance and negative input resistance to compensate resonator losses, and to minimize the flicker noise contributions. The CSD technique not only introduces excess phase shift to eliminate undesired bi-modal oscillation, but inherently provides a large coupling ratio to improve quadrature phase accuracy. Compared to existing phase-shift LC-QVCOs, the proposed CSD-QVCO presents excellent phase accuracy and power efficiency. A prototype of the QVCO was fabricated in TSMC 0.18-μm CMOS technology. The measured phase noise is -120 dBc/Hz at 3-MHz offset from 5-GHz carrier, with a power consumption of 6.4 mW from a 1.2-V supply. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/TCSI.2012.2185305 | IEEE Trans. on Circuits and Systems |
Keywords | Field | DocType |
field effect mmic,cmos analogue integrated circuits,phase shifted transconductance,phase shift technique,resonator loss,voltage-controlled oscillators,power efficiency,voltage-controlled oscillator (vco),quadrature vco,voltage 1.2 v,bi-modal oscillation,phase accuracy,lc tanks,capacitively degenerated differential pair,bimodal oscillation elimination,cmos technology,size 0.18 mum,capacitive source degeneration coupling,lc quadrature vco,phase shift,phase noise,frequency 5 ghz,voltage controlled oscillator,lc circuits,negative input resistance,couplings,transistors,resonant frequency | LC circuit,Flicker noise,Control theory,Phase noise,Capacitive sensing,CMOS,Electronic engineering,dBc,Transconductance,Mathematics,Phase (waves) | Journal |
Volume | Issue | ISSN |
59 | 9 | 1549-8328 |
Citations | PageRank | References |
4 | 0.50 | 15 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Haitao Tong | 1 | 57 | 6.91 |
| Shanfeng Cheng | 2 | 51 | 5.46 |
| Yung-Chung Lo | 3 | 30 | 3.73 |
| Aydin I. Karsilayan | 4 | 46 | 10.28 |
| José Silva-Martínez | 5 | 267 | 39.39 |