TY - GEN
T1 - Development of low phase noise quadrature output digitally controlled CMOS ring oscillator
AU - Nugroho, P.
AU - Pokharel, Ramesh
AU - Anand, A.
AU - Tomar, A.
AU - Kanaya, Haruichi
AU - Yoshida, K.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - A 14-bit digitally controlled ring oscillator (DCO) with operating frequency up to 1 GHz in 0.18 m CMOS technology is designed. The design used digital control to obtain higher output voltage swing and to get lower flicker noise compared to the analog counterpart. To make the oscillator oscillate and to get stable quadrature output in the even number of stages, feed-forward technique is used. Designed DCO has tuning frequency range from 212 MHz to 1 GHz. Phase noise at 4 MHz frequency offset is 137.81 dBc/Hz. Figure of Merit (FoM) calculated as big as 162.25 dBc/Hz, an improvement of about 6 dB from the recently published result.
AB - A 14-bit digitally controlled ring oscillator (DCO) with operating frequency up to 1 GHz in 0.18 m CMOS technology is designed. The design used digital control to obtain higher output voltage swing and to get lower flicker noise compared to the analog counterpart. To make the oscillator oscillate and to get stable quadrature output in the even number of stages, feed-forward technique is used. Designed DCO has tuning frequency range from 212 MHz to 1 GHz. Phase noise at 4 MHz frequency offset is 137.81 dBc/Hz. Figure of Merit (FoM) calculated as big as 162.25 dBc/Hz, an improvement of about 6 dB from the recently published result.
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M3 - Conference contribution
AN - SCOPUS:84860499070
SN - 9780858259744
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 255
EP - 258
BT - Asia-Pacific Microwave Conference Proceedings, APMC 2011
T2 - Asia-Pacific Microwave Conference, APMC 2011
Y2 - 5 December 2011 through 8 December 2011
ER -