Optimum configurations for single-amplifier biquadratic filters

Optimum configurations for single-amplifier biquadratic filters

Two new biquad circuits based on the Sallen-Key positive feedback structure are introduced and shown to be capable of realizing all possible second-order filter functions. The pole design equations and pole sensitivities are identical to those of the Deliyannis bandpass circuit which is the basis fo...

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Veröffentlicht in:IEEE transactions on circuits and systems 1980-12, Vol.27 (12), p.1155-1163
Hauptverfasser: Sedra, A., Ghorab, M., Martin, K.
Format: Artikel
Sprache:eng
Schlagworte:
Band pass filters
Design optimization
Displays
Equations
Feedback circuits
Filtering theory
Negative feedback
Operational amplifiers
Poles and zeros
Transfer functions
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Beschreibung
Zusammenfassung:Two new biquad circuits based on the Sallen-Key positive feedback structure are introduced and shown to be capable of realizing all possible second-order filter functions. The pole design equations and pole sensitivities are identical to those of the Deliyannis bandpass circuit which is the basis for the Friend biquad. The new circuits, however, display lower transmission zero sensitivities than the Friend notch realizations. Design details and experimental results are given.
ISSN:0098-4094
1558-1276
DOI:10.1109/TCS.1980.1084762