Title :
Transformer-coupled voltage controlled osillator
Author :
Yun, Seok-Ju ; Lee, Sang-Gug
Author_Institution :
Sch. of Eng., Inf. & Commun. Univ., Daejeon
Abstract :
This paper presents transformer-coupled VCO using symmetric transformer. By adopting cross-coupled transistors at both side of transformer, phase noise performance is improved by 6 dB compared with conventional VCO. The proposed VCO has been fabricated in CMOS 0.13..m technology. Measured results show -108 dBc/Hz phase noise at 1 MHz offset and frequency range 6.54~6.86 GHz while dissipating 2.1 mA from a 0.6 V supply.
Keywords :
transformers; voltage-controlled oscillators; adopting cross-coupled transistors; phase noise performance; symmetric transformer; transformer-coupled voltage controlled oscillator; CMOS technology; Circuit faults; Energy consumption; Impedance; Phase noise; Power generation; Q factor; Resonant frequency; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958316
