Title :
A high accuracy bandgap reference with chopped modulator to compensate MOSFET mismatch
Author :
Lian-Xi, Liu ; Yin-tang, Yang ; Zhang-Ming, Zhu
Author_Institution :
Microelectron. Inst., Xidian Univ., Xi´´an, China
Abstract :
A design of a low voltage bandgap reference (BGR), for SOC application with high accuracy, is described and the chip layout is presented. To compensate the error caused by the current-mirror mismatch, the chopper modulator is used in the BGR to decrease the offset of the opamp. The design features a reference voltage of 0.256V∼0.768V with supply voltage range from 1 V to 1.5 V and temperature range from -20 °C to 60 °C. The maximum supply current is 4 μA and the area of layout is 0.3 × 0.4 mm2 with a standard 0.25 μm 2P5M n-well CMOS process.
Keywords :
MOSFET; compensation; current mirrors; integrated circuit layout; low-power electronics; modulators; reference circuits; system-on-chip; -20 to 60 C; 0.12 mm; 0.25 micron; 0.3 mm; 0.4 mm; 1 to 1.5 V; 4 muA; CMOS process; MOSFET mismatch; SOC application; bandgap reference; chip layout; chopped modulator; chopper modulator; current-mirror mismatch; opamp offset; system-on-chip; CMOS process; Choppers; Current supplies; Low voltage; MOSFET circuits; Packaging; Photonic band gap; Temperature distribution; Temperature sensors; Wireless sensor networks;
Conference_Titel :
VLSI Design, 2005. 18th International Conference on
Print_ISBN :
0-7695-2264-5
DOI :
10.1109/ICVD.2005.14
