CMOS Current Mode Exponential Function Generator Circuit Using Pade Approximation

Kutluoglu D., Toker A., Ozoguz S.

10th International Conference on Electrical and Electronics Engineering (ELECO), Bursa, Turkey, 30 November - 02 December 2017, pp.1202-1206 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • City: Bursa
  • Country: Turkey
  • Page Numbers: pp.1202-1206
  • Istanbul Technical University Affiliated: Yes


This paper presents a new exponential function approximation, using Pade approximations. An exponential function generator circuit is designed in CMOS 0.35 mu m technology using the proposed approximation methodology. Its performance is measured to verify the mathematical analysis using SPICE tool. The results verified that Pade approximation equations can be used in design of EXPFGs and with a judicious choice of the numerator and denominator polynomials, substantial improvement in the dynamic range can be achieved without having to sacrifice circuit complexity.