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A series of bandgap references (BGRs) using a self-biased symmetrically matched current-voltage mirror (SM CVM) in reducing systematic offset, thus achieving an excellent line regulation, is presented. By replacing the operational amplifier with a CVM in the feedback loop, current consumption is much reduced. An SM buffer stage that is capable of driving a resistive load with minor degradation in temperature coefficient (TC) and line regulation is also presented. The technique is extended to design a sub-1-V BGR with a TC-cancellation output buffer. All circuits are designed using a 0.35- CMOS process, and experimental results are presented, confirming the analysis.
Very Large Scale Integration (VLSI) Systems, IEEE Transactions on (Volume:18 , Issue: 6 )
Date of Publication: June 2010