Title :
Precise wide-dynamic range constant current ratio circuits
Author :
Pookaiyaudom, S. ; Kuhanont, T.
Author_Institution :
King Mongkut´´s Institute of Technology, Bangkok, Thailand
Abstract :
A method of compensation of unequal VBE´s in a conventional constant current ratio circuit is proposed, which improves the accuracy and the dynamic range of the current ratio considerably, without the need to use any higher resistance than normally desirable for integrated circuits. The linearity of the current ratio is better than 1 percent over a dynamic range of greater than four orders of magnitude.
Keywords :
Circuit testing; Covariance matrix; Dynamic range; Equations; Equivalent circuits; Linearity; Maximum likelihood estimation; Mirrors; Process control; Voltage;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1977.10757
