Title :
An ultra low voltage 2.4GHz CMOS VCO
Author :
Troedsson, Niklas ; Sjöland, Henrik
Author_Institution :
Dept. of Electroscience, Lund Univ., Sweden
Abstract :
A 2.4 GHz voltage controlled oscillator (VCO) with very low supply voltage is presented. The oscillator works at just 100 mV above the threshold voltage while fulfilling the phase noise requirements of Bluetooth. The very low supply voltage is achieved by replacing the current-source typically used with an inductor at the source node, thereby eliminating the DC-voltage drop. The oscillator measures a timing range of 13%, a current consumption of 2.8 mA, and a phase noise of -130 dBc/Hz at 3 MHz offset from the carrier frequency for a 0.7 V supply.
Keywords :
Bluetooth; CMOS analogue integrated circuits; UHF integrated circuits; inductors; mobile radio; phase noise; voltage-controlled oscillators; 0.7 V; 2.4 GHz; 2.8 mA; Bluetooth; CMOS VCO; phase noise; source node inductor; very low supply voltage; voltage controlled oscillator; Bluetooth; Current measurement; Frequency measurement; Inductors; Low voltage; Noise measurement; Phase measurement; Phase noise; Threshold voltage; Voltage-controlled oscillators;
Conference_Titel :
Radio and Wireless Conference, 2002. RAWCON 2002. IEEE
Print_ISBN :
0-7803-7458-4
DOI :
10.1109/RAWCON.2002.1030153
