Title :
A temperature compensated relaxation oscillator for SoC implementations
Author :
Taha, Iman ; Mirhassani, Mitra
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Windsor, Windsor, ON, Canada
Abstract :
A temperature and supply independent on-chip reference relaxation oscillator for low voltage design is described. The frequency of oscillation is mainly a function of a PVT robust biasing current. The comparator for the relaxation oscillator is replaced with a high speed common-source stage to eliminate the temperature dependency of the comparator delay. The current sources and voltages are biased by a PVT robust references derived from a bandgap circuitry. This oscillator is designed in TSMC 65 nm CMOS process to operate with a minimum supply voltage of 1.4 V and consumes 100 μW at 157 MHz frequency of oscillation. The oscillator exhibits frequency variation of 1.6% for supply changes from 1.4 V to 1.9 V, and ±1.2% for temperature changes from 20°C to 120°C.
Keywords :
CMOS analogue integrated circuits; comparators (circuits); integrated circuit design; reference circuits; relaxation oscillators; system-on-chip; PVT robust biasing current; SoC; TSMC CMOS process; bandgap circuitry; comparator delay; current sources; frequency 157 MHz; frequency variation; high speed common-source stage; low voltage design; power 100 muW; size 65 nm; supply independent on-chip reference relaxation oscillator; temperature compensated relaxation oscillator; temperature dependency; voltage 1.4 V to 1.9 V; CMOS integrated circuits; Capacitors; Delays; Oscillators; Photonic band gap; System-on-chip; Temperature dependence;
Conference_Titel :
New Circuits and Systems Conference (NEWCAS), 2014 IEEE 12th International
Conference_Location :
Trois-Rivieres, QC
DOI :
10.1109/NEWCAS.2014.6934060
