New low-voltage class AB/AB CMOS op amp with rail-to-rail input/output swing

J. Ramı́rez-Angulo, Milind S. Sawant, S. Thoutam, Antonio J. López‐Martín, R.G. Carvajal

IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing · 2006 · 13 citations · 11 references

Concepts

Abstract

A new low-voltage CMOS Class AB/AB fully differential opamp with rail-to-rail input/output swing and supply voltage lower than two V/sub GS/ drops is presented. The scheme is based on combining floating-gate transistors and Class AB input and output stages. The op amp is characterized by low static power consumption and enhanced slew-rate. Moreover the proposed opamp does not suffer from typical reliability problems related to initial charge trapped in the floating-gate devices. Simulation and experimental results in 0.5-/spl mu/m CMOS technology verify the scheme operating with /spl plusmn/0.9-V supplies and close to rail-to-rail input and output swing.

References

11