Title :
Source-injection parallel coupled LC-QVCO
Author :
Shin, So Bong ; Choi, Hyoung Chul ; Lee, Sang-Gug
Author_Institution :
Sch. of Eng., Inf. & Commun. Univ., Yusong, South Korea
fDate :
7/10/2003 12:00:00 AM
Abstract :
A simple source-injection parallel-coupled (SIPC) LC quadrature voltage controlled oscillator (QVCO) in which the additional noise contributions of the coupling transistors are nearly zero is proposed. The proposed topology is suitable for low phase noise and low supply voltage operation since it involves no additional transistor stacking. Compared to the conventional LC-QVCO, the SIPC topology designed for 2.4 GHz operation shows 19-12 dB improvement in phase noise at 10 kHz-1 MHz frequency offset, from the simulations based on 0.25 μm CMOS technology.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; UHF oscillators; field effect MMIC; integrated circuit noise; phase noise; voltage-controlled oscillators; 0.25 micron; 2.4 GHz; CMOS; SIPC topology; coupling transistors; noise contributions; phase noise; quadrature voltage controlled oscillator; source-injection parallel-coupled LC oscillator; supply voltage;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030679
