A Sub-1-V Low-Noise Bandgap Voltage Reference

A new sub-1-V bandgap voltage reference is presented in this paper, which has advantages over the prior arts in terms of output noise and compatibility with several fabrication processes. The topology allows the reference to operate with a supply voltage as low as 1 V by employing the reverse bandgap voltage principle (RBVP). It also has an attractive low-noise output without the use of a large external filtering capacitor. The design was fabricated with a 0.5-mum BiCMOS process, but it is compatible with most CMOS and BiCMOS fabrication processes. The entire die area is approximately 0.4 mm2, including all test pads and dummy devices. Theoretical analysis and experimental results show that the output noise spectral density is 40 nV/radicHz with a bias current of 20 muA. Moreover, the peak-to-peak output noise in the 0.1-10 Hz band is only 4 muV. The untrimmed reference has a mean output voltage of 190.9 mV at room temperature, and it has a temperature coefficient in the -40degC to +125degC range of 11 ppm/degC (mean) with a standard deviation of 5 ppm/degC.

[1]  J. A. Connelly,et al.  Low noise electronic system design , 1993 .

[2]  Dongsheng Ma,et al.  A Sub-1-V Low-Noise Bandgap Voltage Reference , 2007, IEEE J. Solid State Circuits.

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

[4]  R. Widlar.  Low voltage techniques , 1978, 1978 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[5]  K. E. Kuijk,et al.  A precision reference voltage source , 1973 .

[6]  C. Fiocchi,et al.  Curvature compensated BiCMOS bandgap with 1 V supply voltage , 2001, Proceedings of the 26th European Solid-State Circuits Conference.

[7]  Igor M. Filanovsky,et al.  Operational Amplifier Speed and Accuracy Improvement: Analog Circuit Design With Structural Methodology (KLUWER INTERNATIONAL SERIES IN ENGINEERING AND COMPUTER SCIENCE) , 2004 .

[8]  William Ewart Henley,et al.  OPERATION , 1973, ISO 22301:2019 and business continuity management – Understand how to plan, implement and enhance a business continuity management system (BCMS).

[9]  K. Leung,et al.  A CMOS voltage reference based on weighted /spl Delta/V/sub GS/ for CMOS low-dropout linear regulators , 2003 .

[10]  R. Jacob Baker,et al.  CMOS Circuit Design, Layout, and Simulation , 1997 .

[11]  S. Okwit,et al.  ON SOLID-STATE CIRCUITS. , 1963 .

[12]  Ka Nang Leung,et al.  A CMOS Voltage Reference Based on Weighted V GS for CMOS Low-Dropout Linear Regulators , 2001 .

[13]  Hongchin Lin,et al.  A sub-1V bandgap reference circuit using subthreshold current , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[14]  A. Brokaw,et al.  A simple three-terminal IC bandgap reference , 1974 .

[15]  K. Leung,et al.  A sub-1-V 15-ppm/°C CMOS bandgap voltage reference without requiring low threshold voltage device , 2002, IEEE J. Solid State Circuits.

[16]  R. J. Widlar,et al.  New developments in IC voltage regulators , 1970 .

[17]  Eric A. Vittoz,et al.  Very low power circuit design: fundamentals and limits , 1993, 1993 IEEE International Symposium on Circuits and Systems.

[18]  R. J. Widlar.  Low voltage techniques [for micropower operational amplifiers] , 1978 .

[19]  K. Sakui,et al.  A CMOS bandgap reference circuit with sub-1-V operation , 1999 .

[20]  W. T. Holman,et al.  A compact low noise operational amplifier for a 1.2 /spl mu/m digital CMOS technology , 1995 .