New active RC configuration for realising a medium-selectivity notch filter

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New active RC configuration for realising a medium-selectivity notch filter

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© The Institution of Electrical Engineers
Published

A new configuration for activating the symmetrical twin-T network to realise a medium-selectivity notch filter is given. The ω0 and Q factor sensitivities with respect to all circuit components are very low. The frequency-limitation equations for the circuit are derived, based on the 1-pole rolloff model of the operational amplifier.

Inspec keywords: active filters

Other keywords: active RC networks; active filters; medium selectivity notch filter

Subjects: Filters and other networks

References

    1. 1)
      • R.J. Harris . The design of an operational amplifier notch filter. Proc. Inst. Elec. Electron. Eng. , 1722 - 1723
    2. 2)
      • G.S. Moschytz . FEN filter design using tantalum and silicon integrated circuits. Proc. Inst. Elec. Electron. Eng. , 550 - 566
    3. 3)
      • A. Budak , D.M. Petrela . Frequency limitations of active filters using operational amplifiers. IEEE Trans. , 322 - 328
    4. 4)
      • R.W. Newcomb . (1968) , Active integrated circuit synthesis.
    5. 5)
      • R.M. Inigo . A single operational amplifier notch filter. Proc. Inst. Elec. Electron. Eng.
    6. 6)
      • P. Williams . Notch filters using Wien's bridge. Electron. Lett. , 185 - 186
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