State-space synthesis of a first-order differential class-AB log-domain allpass filter Birinci derece fark alici AB-smifi logaritmik ortam tüm geçiren filtrenin durum-uzay sentezi

Kirçay A., ÇAM U., Tola A. T.

IEEE 13th Signal Processing and Communications Applications Conference, SIU 2005, Kayseri, Turkey, 16 - 18 May 2005, vol.2005, pp.518-521, (Full Text)

  • Publication Type: Conference Paper / Full Text
  • Volume: 2005
  • Doi Number: 10.1109/siu.2005.1567735
  • City: Kayseri
  • Country: Turkey
  • Page Numbers: pp.518-521
  • Dokuz Eylül University Affiliated: Yes

Abstract

A first-order differential type class-AB log-domain filter is proposed. It is systematically derived using the state-space synthesis procedure. To the best knowledge of the authors, the filter is the first log-domain first-order allpass filter in the literature. PSPICE simulations are performed using both, Bipolar Junction Transistors (BJT) and ideal devices to confirm the theoretical analysis. The small deviations in the gain and phase response from theoretical values are caused by the non-idealities of the BJT such as finite-beta, non-zero ohmic junction resistances, Early voltages. © 2005 IEEE.