학술논문
Colpitts VCOs for low-phase noise and low-power applications with transformer-coupled tank
Document Type
Conference
Source
2008 IEEE Radio Frequency Integrated Circuits Symposium Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE. :653-656 Jun, 2008
Subject
Language
ISSN
1529-2517
2375-0995
2375-0995
Abstract
This paper presents two 17 GHz transformercoupled tank VCOs, implemented in a 0.25 μm SiGe:C BiCMOS technology. The VCOs have different impedance-levels of the LC-tank and the active circuit, showing a trade-off between low phase noise and low power. The VCOs include a 2.7 V supply regulator and the VCO cores dissipate 11 and 4.5 mA respectively from this 2.7 V supply. The measured tuning range for both VCOs is from 16.8 to 17.6 GHz and the phase noise is ≪−90 dBc/Hz at 100 kHz from the carrier for the complete tuning range.