Title :
A CMOS switched-capacitor fractional bandgap reference
Author :
Biederman, William ; Yeager, Daniel ; Alon, Elad ; Rabaey, Jan
Author_Institution :
Univ. of California, Berkeley, CA, USA
Abstract :
An architecture for generating a voltage reference at a fraction of the silicon bandgap is proposed. It uses a two-phase switched-capacitor network to add multiples and fractions of VBE and ΔVBE to achieve a near zero temperature coefficient without the use of resistors or op-amps. The 0.0055mm2 circuit, implemented entirely on-chip in 65nm CMOS, produces a voltage of 423mV, has a measured σ of 2.2%, and consumes 138nA while operating at a supply as low as 750mV at -35°C.
Keywords :
CMOS integrated circuits; operational amplifiers; resistors; switched capacitor networks; CMOS switched-capacitor fractional bandgap reference; current 138 nA; near zero temperature coefficient; opamps; resistors; silicon bandgap; size 65 nm; two-phase switched-capacitor network; voltage 423 mV; voltage 750 mV; voltage reference; CMOS integrated circuits; Capacitors; Photonic band gap; Resistors; Switches; Temperature measurement; Voltage measurement;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2012 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1555-5
Electronic_ISBN :
0886-5930
DOI :
10.1109/CICC.2012.6330568
