Title :
AVCO with F-V linearization techniques for CNS application
Author :
Peng Chen ; Rui Guan ; Dongpo Chen
Author_Institution :
Center for Analog/RF Integrated Circuits, Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
An improved VCO for compass navigation system (CNS) application is presented. It has a linearized KVCO and is robust to varactor bias variations. A voltage limit circuit is proposed to ensure that the varactors work in the depletion region. To compensate for active loop filter´s lack of driving ability, a rail to rail opamp is used. Post-simulation results show that a better KVCO performance is achieved compared to the conventional one with tuning voltage changing from 0.15V to 1.65V. Implemented in a 0.18um CMOS process, the proposed VCO operates at 3.2 GHz with power supply of 1.8V.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; compasses; field effect MMIC; linearisation techniques; microwave limiters; operational amplifiers; voltage-controlled oscillators; CMOS process; CNS application; F-V linearization techniques; VCO; active loop filter; compass navigation system; frequency 3.2 GHz; rail to rail opamp; size 0.18 mum; varactor bias variations; voltage 0.15 V to 1.65 V; voltage 1.8 V; voltage limit circuit; CMOS integrated circuits; Noise; Phase locked loops; Robustness; Tuning; Varactors; Voltage-controlled oscillators; CNS; PVT variations; bias robustness; linearized KVCO; voltage controlled oscillator;
Conference_Titel :
ASIC (ASICON), 2013 IEEE 10th International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-6415-7
DOI :
10.1109/ASICON.2013.6811906
