VLSI implementation of GRBF (Gaussian Radial Basis Function) networks

Cevikbas I., Ogrenci A., DÜNDAR G., Balkir S.

Proceedings of the IEEE 2000 International Symposium on Circuits and Systems, ISCAS 2000, Geneva, Switz, İsviçre, 28 - 31 Mayıs 2000, cilt.3, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 3
  • Doi Numarası: 10.1109/iscas.2000.857566
  • Basıldığı Şehir: Geneva, Switz
  • Basıldığı Ülke: İsviçre
  • Boğaziçi Üniversitesi Adresli: Evet

Özet

A GRBF network is designed for VLSI implementation. Building blocks of the network consist mainly of analog circuits: op-amp, multiplier, multiplying DAC (digital to analog converter), floating resistor, summer and exponentiator. Parameters of the network (center, width of the Gaussian function and output layer weights) are represented digitally for convenient interfacing. It is shown that individual GRBF units allow independent tuning of center, width and amplitude. Several network structures are simulated as function approximation examples, and the performance is verified to be satisfactory.