CMOS 1.2V bandgap voltage reference design

A typical bandgap voltage reference based on CSMC 0.35 μm CMOS technology is designed and fabricated. The overall bandgap architecture is optimized to achieve high accuracy temperature and power supply independent voltage reference. The design consists of the bandgap core circuit, op-amp, and start-up circuit. The test results show that the bandgap reference circuit provides reference voltage of 1.2128 V to 1.2175 V with 3.3 V power supply and temperature range from -40°C to 80°C simultaneously, and the temperature coefficient is 32.2ppm/°C. The total layout area including dummy structures is 135 um×236 um.

[1]  Yue-Fang Kuo,et al.  A 1.8- V High-Precision Compensated CMOS Bandgap Reference , 2005, 2005 IEEE Conference on Electron Devices and Solid-State Circuits.

[2]  Ma Yue.  A 46.468µW low-power bandgap voltage reference , 2010, 2010 3rd International Conference on Computer Science and Information Technology.

[3]  Robert G. Meyer,et al.  Analysis and Design of Analog Integrated Circuits , 1993 .

[4]  Akira Matsuzawa,et al.  Sub 1 V CMOS bandgap reference design techniques: a survey , 2010 .