TY - GEN
T1 - A differential-ring-oscillator with up to 35 dBc/Hz phase noise improving amplitude feedback loop for ultra low power systems
AU - Toth, Peter
AU - Ishikuro, Hiroki
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - This work presents a novel idea to dynamically control a differential ring oscillators biasing in order to improve the phase noise performance in the ultra low power domain. This proposed feedback system can be flexibly applied on any type of fully-differential ring oscillator with a tail current source. The following paper covers theoretical and simulative considerations to prove the feasibility of this idea. Finally measurements of a 180 nm standard CMOS integrated prototype system depict the implementability of this idea. A phase noise improvement of up to 35 dBc/Hz can be observed with an active control loop. Moreover, the tuning range of the implemented ring oscillator is extended by 434% in contrast to fixed bias operation. These values are measured at a minimum oscillation power consumption of 55 pW/Hz.
AB - This work presents a novel idea to dynamically control a differential ring oscillators biasing in order to improve the phase noise performance in the ultra low power domain. This proposed feedback system can be flexibly applied on any type of fully-differential ring oscillator with a tail current source. The following paper covers theoretical and simulative considerations to prove the feasibility of this idea. Finally measurements of a 180 nm standard CMOS integrated prototype system depict the implementability of this idea. A phase noise improvement of up to 35 dBc/Hz can be observed with an active control loop. Moreover, the tuning range of the implemented ring oscillator is extended by 434% in contrast to fixed bias operation. These values are measured at a minimum oscillation power consumption of 55 pW/Hz.
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U2 - 10.1109/ICECS46596.2019.8964847
DO - 10.1109/ICECS46596.2019.8964847
M3 - Conference contribution
AN - SCOPUS:85079145473
T3 - 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
SP - 350
EP - 353
BT - 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
Y2 - 27 November 2019 through 29 November 2019
ER -