A low phase-noise CMOS VCO with harmonic tuned LC tank
SCIE
SCOPUS
- Title
- A low phase-noise CMOS VCO with harmonic tuned LC tank
- Authors
- Kim, H; Ryu, S; Chung, YJ; Choi, JS; Kim, B
- Date Issued
- 2006-07
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGI
- Abstract
- This paper presents a phase-noise reduction technique for voltage-controlled oscillators (VCOs) using a harmonic tuned (HT) LC tank. The phase-noise suppression is achieved through almost rectangular-shaped voltage at the switching differential cell, which effectively maximizes the slope of the switching cell output voltage at a zero crossing point. In addition; the proposed technique also suppresses the down-conversion of the noise around the second harmonic frequency by the second harmonic short of the tank. One second HT VCO and two third HT VCOs are designed and implemented to evaluate the concept using a 0.35- and 0.13-mu m CMOS process. The figure-of-merit (FOM) of the second HT VCO, third HT VCO1, and third HT VCO2 are -180.7, -183.7, and -189.5, respectively. The best FOM performance of the VCO has phase noises of -100.4, -132.0, and -140.8 dBc/Hz at 100-kHz, 1-Mz, and 3-MHz offset frequencies at the 2-GHz carrier, respectively. This VCO consumes 3.29 mA from a 1.8-V supply with the silicon area of 500 mu m x 750 mu m.
- Keywords
- CMOS; harmonic tuned (HT) LC tank; low phase noise; voltage-controlled oscillator (VCO); OPTIMIZATION; MODEL
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23916
- DOI
- 10.1109/TMTT.2006.877439
- ISSN
- 0018-9480
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 54, no. 7, page. 2917 - 2924, 2006-07
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.