Title :
A 2.9mW, +/− 85ppm accuracy reference clock generator based on RC oscillator with on-chip temperature calibration
Author :
Satoh, Y. ; Kobayashi, Hideo ; Miyaba, T. ; Kousai, Shouhei
Author_Institution :
Toshiba Corp., Kawasaki, Japan
Abstract :
A novel on-chip frequency calibration of temperature dependency is proposed for CMOS reference frequency generator. High-order temperature coefficients are rapidly extracted by employing a carefully designed on-chip heater, so that the frequency deviation due to the temperature variation is accurately estimated, and compensated in digitally by means of all-digital PLL (ADPLL). The proposed technique was implemented in a 0.18um CMOS and achieved ±85ppm accuracy at 24MHz, consuming a power of 2.9mW.
Keywords :
CMOS digital integrated circuits; RC circuits; digital phase locked loops; oscillators; ADPLL; CMOS reference frequency generator; RC oscillator; all-digital PLL; frequency 24 MHz; frequency deviation; high-order temperature coefficient; on-chip frequency calibration; on-chip heater; on-chip temperature calibration; power 2.9 mW; size 0.18 mum; temperature dependency; temperature variation; Calibration; Heating; Metals; Oscillators; System-on-chip; Temperature dependence; Temperature measurement;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2014 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4799-3327-3
DOI :
10.1109/VLSIC.2014.6858450
