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Lowpass-bandpass transformation for active RC filters

Lowpass-bandpass transformation for active RC filters

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The conventional lowpass-bandpass transformation (transformation of each element separately) is not applicable to active RC networks because it leads to networks also containing inductors. A modified transformation, including explicit design formulas, will be described, which is applicable to the design of active RC bandpass filters realised by cascading 2nd-order sections.

References

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      • S.K. Mitra . , Analysis and synthesis of linear active networks.
    2. 2)
      • R. Saal , E. Ulbrich . On the design of filters by synthesis. IRE Trans.
    3. 3)
      • B. Wise . Active bandpass and bandstop filters using identical networks. Electron. Lett. , 366 - 367
    4. 4)
      • B.T. Henoch . A low pass to band pass transformation for passive and active RC filters. Ericsson Tech. , 91 - 130
    5. 5)
      • A. Antoniou . Bandpass transformation and realization using frequency-dependent negative resistance elements. IEEE Trans. , 297 - 298
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      • W. Saraga . Frequency-selective networks suitable for microelectronic realisation. J. Sci. & Technol. , 128 - 138 and 61–69
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