Title :
5-GHz Low-Phase Noise CMOS Quadrature VCO
Author :
Jeong, Chan-Young ; Yoo, Changsik
Author_Institution :
Dept. of Electron. & Comput. Eng., Hanyang Univ., Seoul
Abstract :
A 5-GHz low-phase noise CMOS quadrature voltage controlled oscillator (QVCO) is described. Two differential pairs (one for negative gm generation and the other one for the coupling input) of each resonator have separate biasing transistors which are switched on and off by the coupling input of each resonator. The proposed QVCO implemented in a 0.13-mum CMOS technology shows 17-dB phase noise improvement from a conventional QVCO with constant tail current sources while the two QVCOs consume the same power of 5.28mW. The phase noise of the proposed QVCO is measured to be -102dBc/Hz and -117dBc/Hz at 100KHz and 1-MHz offset, respectively
Keywords :
CMOS integrated circuits; MMIC oscillators; phase noise; voltage-controlled oscillators; 0.13 micron; 1 MHz; 100 kHz; 5 GHz; 5.28 mW; CMOS technology; biasing transistors; low phase noise; quadrature voltage controlled oscillator; CMOS technology; Local oscillators; MOSFETs; Noise measurement; Phase measurement; Phase noise; Switches; Tail; Voltage; Voltage-controlled oscillators; CMOS; phase noise; quadrature voltage controlled oscillator (QVCO);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.884908
