Title :
A fully integrated 2 GHz LC-VCO with phase noise of -125 dBc/Hz at 600kHz
Author :
De Muer, B. ; De Ranter, C. ; Steyaert, M.
Author_Institution :
Katholieke Universiteit, Leuven, Belgium
Abstract :
A fully integrated 2 GHz very low phase noise LC-tank VCO is presented. Using only integrated planar inductors, the oscillator achieves phase noise as low as -125.1 dBc/Hz at 600 kHz offset and -138 dBc/Hz at 3 MHz. The excellent phase noise performance is achieved by means of an in-house developed simulator-optimizer, which determines the optimal coil parameters for a certain technology. To minimize the upconversion of flicker noise to 1/f3phase noise, a flicker noise upconversion factor is defined and optimized. While consuming 19mA from a 1.8V power supply, the oscillator exceeds DECT as well as DCS-1800 phase noise specifications. The VCO is implemented in a 0.65µm BiCMOS process.
Keywords :
BiCMOS integrated circuits; Coils; Control system synthesis; Costs; Distributed control; Frequency synthesizers; Phase locked loops; Phase noise; Signal synthesis; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 1999. ESSCIRC '99. Proceedings of the 25th European
Conference_Location :
Duisburg, Germany