DocumentCode :
2662759
Title :
Phase noise optimization of a self-cascode VCO by changing the capacitor ratio and substrate bias
Author :
Haider, M.R. ; Zhu, K. ; Islam, S.K. ; Yuan, S. ; Mahfouz, M.
Author_Institution :
Sonoma State Univ., Rohnert Park, CA, USA
fYear :
2011
fDate :
16-19 Jan. 2011
Firstpage :
19
Lastpage :
22
Abstract :
This paper reports a low-voltage low-power self-cascode VCO with a phase noise optimization technique. Self-cascode structure with capacitive feedback network provides better phase noise performance without degrading the voltage headroom. Phase noise performance of the proposed VCO has been optimized by an optimum selection of capacitor ratio. Fabricated in a 0.18-μm RF CMOS process, the oscillator can work with a supply voltage of 1.0 V, with an operating frequency of 1.30 GHz while providing a phase noise of -114.48 dBc/Hz at 1 MHz offset and an output power of -22.27 dBm. Measurement results indicate that an optimum substrate bias ensures the minimization of phase noise.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; biomedical electronics; phase noise; voltage-controlled oscillators; RF CMOS process; capacitive feedback network; capacitor ratio; frequency 1.30 GHz; low-voltage low-power self-cascode VCO; phase noise optimization; size 0.18 mum; substrate bias; voltage 1.0 V; voltage headroom; Capacitance; Phase noise; Substrates; Voltage measurement; Voltage-controlled oscillators; Wireless sensor networks; Low-power; VCO; low-voltage; phase noise; self-cascode structure; substrate bias;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS), 2011 IEEE Topical Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-4244-8316-7
Electronic_ISBN :
978-1-4244-8317-4
Type :
conf
DOI :
10.1109/BIOWIRELESS.2011.5724345
Filename :
5724345
Link To Document :
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