A simple realisation scheme for OTA-C universal biquadratic filter
Titel:
A simple realisation scheme for OTA-C universal biquadratic filter
Auteur:
Khan, Iqbal A. Ahmed, Muslim T. Minhaj, Nigar
Verschenen in:
International journal of electronics
Paginering:
Jaargang 72 (1992) nr. 3 pagina's 419-429
Jaar:
1992-03-01
Inhoud:
A simple scheme for realising four standard second-order voltage transfer functions, viz., low-pass, highpass, bandpass, and band-elimination is presented. It is implemented by using only operational transconductance amplifiers and capacitors to realise two universal biquadratic filters (UBFs), i.e. UBF-I and UBF-II. The UBF-I can also be converted into a sinusoidal oscillator by simply grounding a suitable node. The circuits have the attractive features of wide-range electronic tunability of its pole frequency, bandwidth and pole Q; these can also be programmed digitally. In addition, the filters enjoy excellent sensitivity performance and are suitable for monolithic MOS or Bi-MOS implementation. The effects of non-ideal buffer on the performance of the circuits are studied.