Low power 3rd order feedforward sigma delta ADC design

Akcakaya F. M., DÜNDAR G.

Turkish Journal of Electrical Engineering and Computer Sciences, cilt.25, sa.1, ss.155-162, 2017 (SCI-Expanded, Scopus, TRDizin) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 1
  • Basım Tarihi: 2017
  • Doi Numarası: 10.3906/elk-1507-204
  • Dergi Adı: Turkish Journal of Electrical Engineering and Computer Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.155-162
  • Anahtar Kelimeler: 3rd order, Analog-to-digital converter, Feedforward, Sigma delta
  • Boğaziçi Üniversitesi Adresli: Evet

Özet

In this work, a 3-bit feedforward 3rd order sigma delta analog-to-digital converter (ADC) is presented. In this proposed architecture, feedforward paths and multibit design help the integrator output swings to become smaller, which renders the exploitation of a telescopic cascode opamp in the integrators possible. Moreover, a double sampling method is used to relax the opamp specifications. The proposed sigma delta ADC consumes 28.2 fiW and has 81.3 dB SNDR according to postlayout simulations.