A CMOS Operational Amplifier with Constant 68° phase margin over its whole range of noise-power trade-off programmability

Author

Der Heide, Philipp Meier auf ; Bronskowski, Carsten ; Tomasik, Jakob M. ; Schroeder, Dietmar

Author_Institution

Hamburg Univ. of Technol., Hamburg

fYear

2007

fDate

11-13 Sept. 2007

Firstpage

452

Lastpage

455

Abstract

The problem of variable phase margin of our programmable operational amplifier (OpAmp), which was presented at ESSCIRC 2006, has been solved. The OpAmp is programmable concerning noise and power consumption, while the phase margin is kept at an approximately constant value of 68deg for the whole range of programmability. Experimental results for a 0.35 mum CMOS OpAmp show either low noise of 3.6 nV/radicHz or low power consumption of 59 muW, and a phase margin variation of only Deltaphi_res = 6deg.

Keywords

CMOS analogue integrated circuits; low-power electronics; operational amplifiers; CMOS operational amplifier; ESSCIRC 2006; OpAmp; noise-power trade-off programmability; power 59 muW; power consumption; programmable operational amplifier; size 0.35 mum; variable phase margin; CMOS technology; Circuits; Energy consumption; MOSFETs; Mirrors; Nanoelectronics; Operational amplifiers; Phase noise; Rail to rail inputs; Rail to rail outputs;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid State Circuits Conference, 2007. ESSCIRC 2007. 33rd European

Conference_Location

Munich

ISSN

1930-8833

Print_ISBN

978-1-4244-1125-2

Type

conf

DOI

10.1109/ESSCIRC.2007.4430340

Filename

4430340