Title :
Phase noise analysis and design of a 3-GHz bipolar differential colpitts VCO
Author :
Wang, Xiaoyan ; Fard, Ali ; Andreani, Pietro
Author_Institution :
Infineon Technol. AG, Munich, Germany
Abstract :
This paper presents a low-phase-noise differential bipolar Colpitts VCO, implemented in a 0.35μm BiCMOS process. A time-variant phase noise analysis yields closed- form symbolic expressions for the dominant noise sources in the 1/f2 phase-noise region. Measurements show a phase noise of -123 dBc/Hz at 1MHz offset from a 2.8-3.1 GHz carrier, for a figure-of-merit of 183 dBc/Hz. A very good agreement between the derived theoretical formulas, spectreRF simulations, and measurements is observed.
Keywords :
BiCMOS integrated circuits; bipolar integrated circuits; integrated circuit noise; microwave oscillators; random noise; voltage-controlled oscillators; 0.35 micron; 1 MHz; 2.8 to 3.1 GHz; BiCMOS process; bipolar differential colpitts VCO; dominant noise sources; phase-noise region; spectreRF simulations; time-variant phase noise analysis; voltage controlled oscillator; Chromium; Inductors; Noise generators; Noise measurement; Phase measurement; Phase noise; Radio frequency; Topology; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European
Print_ISBN :
0-7803-9205-1
DOI :
10.1109/ESSCIR.2005.1541642
