Performances of CMOS Thermal-Compensation Total-Current References

Provided by: WSEAS
Topic: Hardware
Format: PDF
Total-current reference sources, composed of two classic cross-connected current mirrors, have been launched by the authors in some earlier published works. Theirs major advantages are: simple serially interconnection with the charge and the minimum supply current (this is just the reference current). This paper is a comparative analysis of the performances of two total-current reference-source variants with first and second-order thermal compensation, using different integrated resistor types, having positive, zero or negative temperature coefficient. The possibility of obtaining a set of good performances by using NTC resistors is signaled but also, the inefficiency of second-order thermal-compensation for many cases of resistor temperature-coefficient combinations.

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