Title :
A low power 8-bit digitally controlled CMOS ring oscillator
Author :
Nugroho, P. ; Pokharel, Ramesh K. ; Anand, A. ; Hashimura, R. ; Zhang, Ge ; Dong, Roy ; Kanaya, Haruichi ; Yoshida, Kenta
Author_Institution :
Grad. Sch. of Inf. Sci. & Electr. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
A novel low power 8-bit digitally controlled oscillator in 0.18 μm CMOS technology is designed and implemented. It consumes only 12.6 mW to oscillate at 3.44 GHz. Sub-feedback technique is used to produce stable quadrature output with even number of stages. Tuning frequency range is from 1.2 GHz to 3.44 GHz, i.e., it has tuning width of about 97%. Phase noise of -110.9 dBc/Hz is achieved at 3.44 GHz carrier and 4 MHz frequency offset. Figure of Merit (FoM) is -158.6 dBc/Hz.
Keywords :
CMOS integrated circuits; circuit tuning; oscillators; phase noise; CMOS technology; FoM; figure of merit; frequency 1.2 GHz to 3.44 GHz; frequency offset; low power digitally controlled CMOS ring oscillator; phase noise; power 12.6 mW; size 0.18 mum; stable quadrature output; subfeedback technique; tuning frequency range; tuning width; word length 8 bit; CMOS integrated circuits; Inverters; Phase noise; Ring oscillators; Transistors; Tuning; Digital-controlled oscillators; oscillators; phase noise; ring oscillators;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
