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Designing 1-V op amps using standard digital CMOS technology

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3 Author(s)
Blalock, B.J. ; Dept. of Electr. & Comput. Eng., Mississippi State Univ., MS, USA ; Allen, P.E. ; Rincon-Mora, G.

This paper addresses the difficulty of designing 1-V capable analog circuits in standard digital complementary metal-oxide-semiconductor (CMOS) technology, Design techniques for facilitating 1-V operation are discussed and 1-V analog building block circuits are presented. Most of these circuits use the bulk-driving technique to circumvent the metal-oxide-semiconductor field-effect transistor turn-on (threshold) voltage requirement. Finally, techniques are combined within a 1-V CMOS operational amplifier with rail-to-rail input and output ranges. While consuming 300 μW, the 1-V rail-to-rail CMOS op amp achieves 1.3-MHz unity-gain frequency and 57° phase margin for a 22-pF load capacitance

Published in:

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:45 ,  Issue: 7 )

Date of Publication:

Jul 1998

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