Title :
A 5 GHz pHEMT transformer-coupled VCO
Author :
Lai, Ping Wing ; Long, Stephen I.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
A transformer-coupled technique is shown to be an area-efficient method for reducing oscillator phase noise. Higher signal amplitude and inductor Q can be achieved without breakdown. A pHEMT process was used to fabricate the 5 GHz VCO. The measured phase noise at 3 MHz offset frequency is -129 dBc/Hz. The VCO dissipates 9 mW.
Keywords :
HEMT integrated circuits; Q-factor; inductors; integrated circuit design; phase noise; voltage-controlled oscillators; 5 GHz; 9 mW; circuit design; inductor Q-factor; oscillator phase noise reduction; pHEMT transformer-coupled VCO; signal amplitude; Breakdown voltage; Circuit faults; Circuit noise; Electric breakdown; Equations; Inductors; Noise level; PHEMTs; Phase noise; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE
Print_ISBN :
0-7803-8983-2
DOI :
10.1109/RFIC.2005.1489609
