trashbox wrote on Sep 7th, 2008, 11:47pm:Hi all,
There is many error sources in bandgap such as op offset, passive device mismatch, current mirror mismatch etc. Is there any papers who compare these errors, figure out which is the most important?
If chopper amp is used in bandgap, which chopper amp has the smallest area? I read Burt's paper on JSSC 2006, its area is 0.8m^2 under 0.6um. It is too large for bandgap reference.
Thanks!
Statistical Analysis and Optimization of a Bandgap Reference for VLSI Applications
J ¨ URGEN OEHM1 AND ULRICH GR ¨ UNEBAUM2
1Infineon AG, D¨usseldorf, Germany
2ZKOM GmbH, Dortmund, Germany
E-mail: J.Oehm@infineon.com; Grueneba@zkom.de
Received February 15, 2001; Revised February 27, 2001; Accepted February 27, 2001
Abstract. Voltage and current references are widely needed for all kinds of integrated circuits, as most applications
require temperature-independent references with a high reproducibility in mass production. For this purpose
normally bandgap references are used. Though it is a common task to set up an application specific bandgap circuit,
handling of the statistical design aspects is often not a standardized step in the design flow. This article describes
some of the steps that were taken during the design of a bandgap reference for a given VLSI application. All
statistical simulations were carried out with the simulation tool GAME (General Analysis of Mismatch Effects)
which is used at Infineon/D¨usseldorf since 1999.
Key Words: bandgap, statistical analysis, mismatch, optimization, simulation