Title :
A novel 14-bit digitally controlled ring oscillator
Author :
Nugroho, P. ; Pokharel, R.K. ; Anand, A. ; Kanaya, H. ; Yoshida, K.
Author_Institution :
Grad. Sch. of Inf. Sci. & Electr. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
A novel 14-bit digitally controlled ring oscillator is designed in 0.18 μm CMOS technology. Sub-feedback technique is used to increase the output frequency that produces stable oscillation with even number of stages. Frequency can be tuned from 674 MHz to 4 GHz. Phase noise at 4 GHz carrier frequency and 4 MHz offset is -119.4dBc/Hz. Figure of Merit (FoM) calculated is 156 dBc/Hz.
Keywords :
CMOS integrated circuits; MMIC oscillators; field effect MMIC; phase noise; CMOS technology; digitally controlled ring oscillator; figure of merit; frequency 674 MHz to 4 GHz; phase noise; size 0.18 mum; sub-feedback technique; word length 14 bit; Delay; Inverters; Phase noise; Ring oscillators; Transistors; Tuning; Digitally controlled oscillators; oscillators; ring oscillators; sub-feedback;
Conference_Titel :
Electronics, Communications and Computers (JEC-ECC), 2012 Japan-Egypt Conference on
Conference_Location :
Alexandria
Print_ISBN :
978-1-4673-0485-6
DOI :
10.1109/JEC-ECC.2012.6186949
