1. Allen, PE and Holberg, DR. 2002.CMOS Analog Circuit Design, 2nd, Vol. 55, 393Oxford: Oxford University Press.
2. Low-voltage rail-supply-insensitive PTAT current generator
3. Gray, PR, Hurst, PJ, Lewis, SH and Meyer, RG. 2001.Analysis and Design of Analog Integrated Circuits, 4th, 42–43. New York, NY: John Wiley and Sons Inc.
4. Low-voltage, wide-range, current-controlled DC current generator
5. New class of high-performance PTAT current sources