Title :
High performance 1 V 2.4 GHz CMOS VCO
Author :
Troedsson, Niklas ; Sjöland, Henrik
Author_Institution :
Dept. of Electroscience, Lund Univ., Sweden
Abstract :
A low phase noise 2.4 GHz voltage controlled oscillator (VCO) with 1 V supply is presented. The VCO is based on the differential negative resistance oscillator with the tail current source replaced by an inductor. The inductor both improves the noise factor of the oscillator and enables maximum voltage swing over the tank. The amplitude limitation which is usually set by the tail current source is instead performed by an amplitude control loop adjusting the gate bias voltage. The oscillator measures a tuning range of 15%, a power consumption of 5.5 mW, and a phase noise of -136 dBc/Hz at 3 MHz offset from the carrier frequency for a 1 V supply.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; gain control; integrated circuit design; integrated circuit noise; negative resistance circuits; phase noise; voltage-controlled oscillators; 1 V; 2.4 GHz; 5.5 mW; CMOS VCO; amplitude control loop; differential negative resistance oscillator; gate bias voltage adjustment; low phase noise VCO; oscillator noise factor; source inductor; tuning range; voltage controlled oscillator; Frequency measurement; Inductors; Noise measurement; Phase measurement; Phase noise; Power measurement; Tail; Voltage control; Voltage measurement; Voltage-controlled oscillators;
Conference_Titel :
ASIC, 2002. Proceedings. 2002 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-7363-4
DOI :
10.1109/APASIC.2002.1031563
