Title :
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
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 Deltaphires = 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;
Conference_Titel :
Solid State Circuits Conference, 2007. ESSCIRC 2007. 33rd European
Conference_Location :
Munich
Print_ISBN :
978-1-4244-1125-2
DOI :
10.1109/ESSCIRC.2007.4430340
