Title :
A Novel Harmonic Noise Frequency Filtering VCO for Optimizing Phase Noise
Author :
Yoon, Jae-Ho ; Lee, Sang-Hun ; Koh, Ah-Rah ; Shrestha, Bhanu ; Cheon, Sang-Hoon ; Kennedy, Gary P. ; Kim, Nam-Young
Author_Institution :
RFIC Res. & Educ. Center, Kwangwoon Univ., Seoul
Abstract :
InGaP/GaAs HBT LC-VCOs designed with and without the proposed harmonic noise frequency filtering (HNFF) technique are presented here. To optimize phase noise, the HNFF technique is compared using noise frequency filtering capacitors. The HNFF-VCO produced ultra low phase noise performance. The tuning range of this VCO is 261 MHz with an output power of -10.25 dBm at 1.721 GHz carrier. Furthermore, the phase noise of this VCO -133.96 dBc/Hz at 1 MHz offset. The HNFF-VCO is designed with a total chip area of 0.9 - 0.9 mm2. Its phase noise performance is enhanced by 8.9 dBc at 1 MHz offset by comparison with a N-VCO without the HNFF technique
Keywords :
III-V semiconductors; UHF oscillators; VHF oscillators; bipolar transistor circuits; gallium compounds; indium compounds; phase noise; voltage-controlled oscillators; 0.9 mm; 1 MHz; 1.721 GHz; 261 MHz; HBT LC-VCO; InGaP-GaAs; harmonic noise frequency filtering technique; noise frequency filtering capacitors; phase noise; Capacitors; Filtering; Frequency; Gallium arsenide; Heterojunction bipolar transistors; Phase noise; Power generation; Power harmonic filters; Tuning; Voltage-controlled oscillators; InGaP/GaAs heterodyne bipolar transistor (HBT); LC-voltage controlled oscillators (LC-VCOs); cross-coupled differential configuration; harmonic noise frequency filtering technique; phase noise;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249745
