Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6945348 | Microelectronics Journal | 2016 | 8 Pages |
Abstract
In this paper, a new structure for a capacitor feedback with quality factor enhancement of 5Â GHz band CMOS VCO is presented. The proposed VCO was able to reduce the parasitic effect of the circuit at high frequencies and without additional body biased voltage. The phase noise was improved with this capacitor feedback circuit. The circuit was analyzed by means of a simplified high frequency model. The improvement of low power consumption resulted from the adopted self-body biased technology without additional body biased voltage. The optimal low voltage design with 0.8Â V was determined as the aim for low phase noise. The measured bandwidth of the frequency was from 5.07Â GHz to 6.2Â GHz with a 20.37% tuning ratio. The core consumption was 2.8Â mW from the 0.8Â V supply. The phase noise of the proposed VCO was â117.34Â dBc/Hz at an offset frequency of 1Â MHz. The figure of merit was â187.45Â dBc/Hz and the figure of merit with tuning range (FOMT) was â193.6Â dBc/Hz.
Related Topics
Physical Sciences and Engineering
Computer Science
Hardware and Architecture
Authors
Meng-Ting Hsu, Wei-Jhih Li, Shuo-Chang Hsu,