Journal
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS
Volume 19, Issue 5, Pages 1015-1024Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218126610006578
Keywords
Square root domain filters; Tow-Thomas biquadratic filter; state space synthesis
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In this paper, a Tow-Thomas biquadratic filter designed in square root domain is proposed. The presented filter is constructed with a lossy integrator, a lossless integrator, and a summer block. To the best knowledge of the authors, the filter is the first square root domain Tow-Thomas filter in the literature. The state space synthesis method is used to design the biquadratic filter. The filter operated at 2.5 V supply voltage is simulated by using SPICE simulation program with 0: 25 mu m TSMC CMOS model parameters. Simulation results are in good agreement with theoretical results that the cut-off frequency and quality factor of the filter are tunable electronically.
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