An unconditionally stable two-stage CMOS amplifier

This paper describes a two-stage CMOS amplifier that is stable for any capacitive load. This is achieved through the use of an optimized cascoded compensation topology. A new level shifting technique allows independent optimization of drive capability, noise and systematic offset voltage. The circuit is 0.1 mm/sup 2/ in a 2 /spl mu/m technology and has a quiescent current consumption of 110 /spl mu/A. >

[1]  Michiel Steyaert,et al.  A high-dynamic-range CMOS op amp with low-distortion output structure , 1987 .

[2]  B.K. Ahuja,et al.  An improved frequency compensation technique for CMOS operational amplifiers , 1983, IEEE Journal of Solid-State Circuits.

[3]  M. Degrauwe,et al.  A Micropower CMOS-Instrumentation Amplifier , 1985, IEEE Journal of Solid-State Circuits.

[4]  R. Castello,et al.  A CMOS low-distortion fully differential power amplifier with double nested Miller compensation , 1993 .

[5]  Robin F. B. Turner,et al.  A CMOS potentiostat for amperometric chemical sensors , 1987 .

[6]  M.G.R. Degrauwe,et al.  A rail-to-rail input/output CMOS power amplifier , 1989 .

[7]  Willy Sansen,et al.  A CMOS large-swing low-distortion three-stage class AB power amplifier , 1990 .

[8]  Gregory T. A. Kovacs,et al.  An integrated CMOS potentiostat for miniaturized electroanalytical instrumentation , 1994, Proceedings of IEEE International Solid-State Circuits Conference - ISSCC '94.

[9]  C.A.T. Salama,et al.  An efficient CMOS buffer for driving large capacitive loads , 1986 .

[10]  J.A. Fisher.  A high-performance CMOS power amplifier , 1985, IEEE Journal of Solid-State Circuits.

[11]  K. Nagaraj.  Large-swing CMOS buffer amplifier , 1989 .

[12]  J. N. Babanezhad.  A rail-to-rail CMOS op amp , 1988 .

[13]  Sidney Soclof.  Analog integrated circuits , 1985 .

[14]  Majid Ahmadi,et al.  A high-dynamic range CMOS buffer amplifier with high-drive capability , 1992, [Proceedings] 1992 IEEE International Symposium on Circuits and Systems.

[15]  Willy Sansen,et al.  A smart sensor for the voltammetric measurement of oxygen or glucose-concentrations , 1990 .

[16]  K. E. Brehmer,et al.  Large swing CMOS power amplifier , 1983 .