Second-Order Active RC Bandpass Filters Using Operational Amplifier in Low-Gain Connection

  • Suhash Chandra Dutta RoyEmail author


A critical study is made of a canonic second-order bandpass realization using a single-operational amplifier in low-gain (unity or two) connection. The circuit is suitable for low- and medium Q applications and features good stability, wide frequency range of operation and versatility of conversion to a high-pass filter. An all-grounded-capacitor version of the filter is also given; which is a desirable feature for integrated circuit (IC) implementation. The unity gain configuration presents component minimization over other similar circuits.


Active RC Bandpass filter Second order Operational amplifier Low-gain connection 


  1. 1.
    M.A. Soderstrand, S.K. Mitra, Extremely low sensitivity active RC filters. Proc. IEEE 57(12), 2175 (1969)CrossRefGoogle Scholar
  2. 2.
    P.R. Geffe, A Q-invariant active resonator. Proc. IEEE 57(8), 1442 (1969)CrossRefGoogle Scholar
  3. 3.
    T. Deliyannis, A low-pass filter with extremely low sensitivity. Proc. IEEE 58(9), 1366–1367 (1970)CrossRefGoogle Scholar
  4. 4.
    R.P. Sallen, E.L. Key, A practical method of designing RC active filters. Trans. IRE. CT 2(1), 74–85 (1955)Google Scholar
  5. 5.
    A.S. Sedra, A class of stable active filters using unity gain voltage followers. IEEE J. SC 7(4), 311–315 (1972)Google Scholar
  6. 6.
    D. Berndt, S.C. Dutta Roy, Inductor simulation using a unity gain amplifier. IEEE J. SC 4(2), 161–162 (1969)Google Scholar
  7. 7.
    H.T. Russel, Single amplifier active filters give stable Q. EDN/EEE. 17(1), 65–66 (1972)Google Scholar
  8. 8.
    F. Anday, Realization of 2nd–order transfer function using a minimum number of elements. Electron. Lett. 8(24), 611–612 (1972)CrossRefGoogle Scholar
  9. 9.
    G.S. Moschytz, Gain sensitivity product a figure of merit for hybrid—integrated filters using single operational amplifiers. IEEE J. SC 6(2), 103–110 (1971)Google Scholar
  10. 10.
    S.K. Mitra, Filter design using integrated operational amplifiers (Proc. WESCON, San Francisco, California, 1969)Google Scholar
  11. 11.
    A. Budak, D.M. Petrela, Frequency limitations of active filters using operational amplifiers. IEEE Trans. CT 19(3), 322–328 (1972)CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Indian Institute of Technology DelhiNew DelhiIndia

Personalised recommendations