New voltage-model/current-mode universal biquad filter using unity-gain cells |
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| Authors: | S. S. Gupta |
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| Affiliation: | Analog Signal Processing Research Lab., Division of Electronics and Communication Engineering , Netaji Subhas Institute of Technology , Sector-3, Dwarka, New Delhi 110 075, India |
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| Abstract: | A new universal biquad filter is presented which can realize all the five standard filter functions namely lowpass, bandpass, highpass, notch and allpass in voltage-mode (VM) as well as in current-mode (CM) employing only unity-gain cells (i.e. voltage followers and current followers) as active elements. Explicit VM/CM outputs are available from low output impedance terminals and high output impedance terminals, respectively. The workability of the proposed universal biquad, realized with CMOS unity-gain cells, is established by SPICE simulations. |
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| Keywords: | Universal biquad filters Unity-gain cells Current-mode circuits |
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