Title :
A process compensation technique for integrated VCO
Author :
Ang, Karen Chai Moy ; Chia, Michael Yan Wah ; Li, David Po Ming
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
Abstract :
A 2.576 GHz low phase-noise integrated VCO is presented, featuring a technique to compensate frequency drifts arising from process variation in PN varactors. PN varactors are used to achieve 10% tuning range, while MOS varactors are digitally switched to compensate for capacitance variations in the PN varactors. The designed VCO yields phase-noise as low as -98dBc/Hz at 100 kHz offset and guarantees 141 MHz of tuning range in the presence of manufacturing inaccuracies.
Keywords :
BiCMOS integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; phase noise; varactors; voltage-controlled oscillators; 141 MHz; 2.576 GHz; BiCMOS technology; PN varactor frequency drift; VCO process compensation technique; digitally switched MOS varactors; integrated LC VCO; low phase-noise VCO; process monitoring; process variation; tuning range; varactor capacitance variations; Capacitance-voltage characteristics; Circuit optimization; Frequency; Monitoring; Parasitic capacitance; Phase noise; Tuning; Varactors; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE
Print_ISBN :
0-7803-8333-8
DOI :
10.1109/RFIC.2004.1320690
