A low-power, small-area and programmable bandgap reference

Author

Chun, Hosung ; Skafidas, Stan

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Melbourne, Melbourne, VIC, Australia

fYear

2012

fDate

5-8 Aug. 2012

Firstpage

510

Lastpage

513

Abstract

In this paper, we present a low-power, small-area and programmable bandgap reference, based on the reverse bandgap reference concept. It is implemented in a 65nm digital CMOS process with 1.2V power supply. It employs two switched capacitor amplifiers to weight temperature dependent voltages with opposite polarity. Programmability is achieved by adjusting a closed-loop gain of these two amplifiers. The implemented BGR generates three reference voltages, such as 0.591V (V_REF1), 0.872V (V_REF2) and 1.189V (V_REF3). In simulation, with ±10% supply voltage variation, the temperature coefficient (TC) of V_REF1, V_REF2 and V_REF3 is less than 43ppm/°C, 28ppm/°C and 33ppm/°C, respectivley, in the temperature range from -40°C to 100°C. The average power consumption is less than 40μW for V_REF1, 60μW for V_REF2 and 110μW for V_REF3. The layout area (excluding bonding pads) is 200μm by 190μm.

Keywords

CMOS digital integrated circuits; amplifiers; energy gap; low-power electronics; power consumption; programmable circuits; reference circuits; switched capacitor networks; temperature; BGR; TC; closed-loop gain; digital CMOS process; low-power bandgap reference; polarity; power consumption; power supply; programmable bandgap reference; reverse bandgap reference; size 65 nm; small-area bandgap reference; switched capacitor amplifier; temperature -40 C to 100 C; temperature coefficient; voltage 0.591 V; voltage 0.872 V; voltage 1.189 V; voltage 1.2 V; weight temperature dependent voltage; CMOS process; Capacitors; Photonic band gap; Power supplies; Temperature dependence; Temperature distribution; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on

Conference_Location

Boise, ID

ISSN

1548-3746

Print_ISBN

978-1-4673-2526-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2012.6292069

Filename

6292069