Title :
A 1 mW low phase-noise relaxation oscillator
Author :
Casaleiro, Joao ; Lopes, Hugo ; Oliveira, Luis B. ; Fernandes, Jorge R. ; Silva, Manuel M.
Author_Institution :
Dept. Eng. Electrotec., Univ. Nova de Lisboa, Caparica, Portugal
Abstract :
We present a new RC relaxation oscillator with pulse self biasing, to reduce power consumption, and with harmonic filtering and resistor feedback, to reduce phase-noise. A circuit prototype in the hundreds of MHz range, designed in a 130 nm CMOS technology has a very low phase-noise, -132.6 dBc/Hz @ 10 MHz offset, and the power consumption is only 1 mW, which leads to a figure of merit (FOM) of -159.1 dBc/Hz.
Keywords :
CMOS analogue integrated circuits; harmonic oscillators (circuits); CMOS technology; FOM; RC relaxation oscillator; circuit prototype; figure of merit; harmonic filtering; low phase-noise relaxation oscillator; power 1 mW; power consumption; resistor feedback; size 130 nm; Filtering; Harmonic analysis; Power demand; Power harmonic filters; Ring oscillators; Switches;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5937770
