Title :
Analytical determination of output resistance and DC matching errors in MOS current mirrors
Author_Institution :
Dept. of Electr. Eng., Swiss Federal Inst. of Technol., Zurich, Switzerland
fDate :
10/1/1990 12:00:00 AM
Abstract :
A new technique for the analytical determination of output resistance and current ratio or DC matching errors in MOS current mirrors is presented, emphasising, in comparison four types of frequently used circuit: the simple current mirror, the Wilson current mirror, the improved Wilson current mirror and the cascode current mirror. Formulas that precisely describe the performance parameters are derived. The minimum output voltage is also discussed. A review of other types of current mirror configurations is included
Keywords :
MOS integrated circuits; amplifiers; electric resistance; errors; linear integrated circuits; CMOS analogue circuit design; DC matching errors; MOS current mirrors; Wilson current mirror; analytical determination; cascode current mirror; current mirror configurations; current ratio; minimum output voltage; nMOS analogue circuit design; output resistance; performance parameters; simple current mirror;
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings G
