Title :
A 10MHz 80μW 67 ppm/°C CMOS reference clock oscillator with a temperature compensated feedback loop in 0.18μm CMOS
Author :
Lee, Junghyup ; Cho, SeongHwan
Author_Institution :
Department of EECS, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejon, Republic of Korea
Abstract :
A 10MHz, 80μW CMOS reference clock oscillator is presented in 0.18μm CMOS. The proposed oscillator employs a supply-regulated ring-oscillator in a temperature compensated feedback loop, which minimizes the frequency sensitivity to supply and temperature variations. The clock oscillator achieves frequency variation of less than ±0.05% against supply variation of 1.2V ~ 3V and ±0.4% against temperature variation of −20°C ~ 120°C. In addition, low power consumption is achieved by using sub-threshold bias circuits.
Keywords :
Circuits; Clocks; Energy consumption; Feedback loop; Frequency conversion; Photonic band gap; Stability; Temperature sensors; Voltage control; Voltage-controlled oscillators; CMOS; clock; frequency; low power; oscillator; temperature compensation;
Conference_Titel :
VLSI Circuits, 2009 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
978-1-4244-3307-0
Electronic_ISBN :
978-4-86348-001-8