Low power sigma delta converter with SAR ADC for audio frequencies

Akcakaya F. M., DÜNDAR G.

2013 IEEE Faible Tension Faible Consommation, FTFC 2013, Paris, Fransa, 20 - 21 Haziran 2013, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/ftfc.2013.6577769
  • Basıldığı Şehir: Paris
  • Basıldığı Ülke: Fransa
  • Anahtar Kelimeler: Audio Frequencies, Discrete Time, Low Power, SAR, Second Order, Sigma Delta
  • Boğaziçi Üniversitesi Adresli: Evet

Özet

A low power second order feedforward sigma delta converter is described in this paper. A 3 bit SAR is used in the design as ADC and the coefficients of the SAR are used to sum the feedforward signals in the design. A telescopic cascode opamp is used as integrator. As a result, 76.8dB SNR is achieved with 20μW power consumption for 25kHz signal bandwidth and 32 OSR in 0.18μm CMOS technology. © 2013 IEEE.