Hristov, Marin Hristov; Rashev, Ivan Krasimirov; Arabadzhiev, Dobromir Nikolov
CMOS VCO design
Proceedings of the Technical University – Sofia, 56(1), 2006, pp. 109-113
TU - Sofia
QVCO; negative resistance; bluetooth; CMOS technology
In this article , the design of quadrature voltage controlled oscillator (Q-VCO), which covers the Bluetooh requirements is described. A methodology which makes easy the design of oscillators with negative resistance is shown. Standard 0.35um CMOS process was used. The circuit is fully monolithic, and this decreases its price. The oscillator has output buffers, which ensure the necessary power of the output signal. The supply voltage is 1,5 volts and is limited by the used technology and the parameters necessary for the normal work of the oscillator. The overall power consumption of the oscillator and the output buffers is 107 mW, and the phase noise is -108dBc/Hz, at 600 kHz from the carrier.
Reviewer prof. Tihomir Takov. - Formulas, diagr. - References, pp. 113