A new log-domain realization of two-integrator-loop biquad

Kircay A., ÇAM U.

FREQUENZ, vol.60, pp.50-52, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 60
  • Publication Date: 2006
  • Doi Number: 10.1515/freq.2006.60.3-4.50
  • Journal Name: FREQUENZ
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.50-52
  • Keywords: two-integrator-loop biquad, log-domain filters, current-mode circuits, state-space synthesis, FILTERS, DESIGN
  • Dokuz Eylül University Affiliated: Yes


This paper proposes a new log-domain realization of biquadratic filter, which is systematically derived using the two-integrator-loop and state-space synthesis procedure. The filter is constructed with two integrators and current summer circuit. This biquadratic realizes highpass filter, bandpass filter and lowpass filter simultaneously. The proposed filter has a simple structure and can be electronically tuned. PSPICE simulations are given to confirm the theoretical analysis.