A switched capacitor based universal filter for IVRS

  • Ajay Lahane
  • Swapnali G. Gharat
  • Uday Pandit Khot
Conference paper


Interactive voice response systems (IVRS, IVR System) are currently used in abundance as interfaces at a wide variety of support centers, call centers and other information retrieval centers. When a support center with IVRS is contacted by a caller, the caller is typically first presented with voice information from an interactive voice response unit (IVRU). The caller responses to the voice queries by providing input through the phone keypad. Each key input provided by the caller from the keypad is assigned with specific information in the database of the IVRS [1].


Clock Frequency Input Port Switching Frequency Interactive Voice Response Support Center 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    United States Patent, System and method for graphically displaying and navigating through web based interactive voice system, Dec. 2004Google Scholar
  2. 2.
    United States Patent, Method and system for graphicallydisplaying and navigating through an interactive voice response menu, Nov. 15, 1995Google Scholar
  3. 3.
    Wikipedia, the free encyclopedia, Interactive voice response, pp. 1–4,10 Oct. 2008Google Scholar
  4. 4.
    D. J. Allstot and W.C. Black, Jr., “Technology design consideration for MOS switched capacitor filter systems,” Proc. IEEE, vol. 71, no. 8, pp. 967-986, Aug. 1983CrossRefGoogle Scholar
  5. 5.
    R. W. Brodersen, P. R. Gray, and D. A. Hodges, “MOS switched capacitor filters,” Proc. IEEE, vol. 67, no.1, pp. 61-75, Jan. 1979CrossRefGoogle Scholar
  6. 6.
    S. Signell and K. Mossberg, “Offset-compensation of two phase switched-capacitor filters,” IEEE Trans. Circuits Syst., CAS-36, no. 1, pp. 31-41, Jan. 1998MathSciNetGoogle Scholar
  7. 7.
    R. Gregorian, K. W. Martin, and G. C. Temes, “Switchedcapacitor circuit design,” Proc. IEEE, vol.71, no. 8, pp. 180-205, Aug. 1983CrossRefGoogle Scholar
  8. 8.
    K. Lacanette, “ A Basic Introduction to Filters- Active, Passive, and Switched- Capacitor,” National semiconductor application Note 779, Apr. 1991Google Scholar
  9. 9.
    P. V. Ananda Mohan, V. Ramchandran, and M. N. S. Swamy, Switched Capacitor Filters Theory, Analysis and Design, Prentice Hall International Ltd, UK, 1995Google Scholar
  10. 10.
    R. A. Gayakwad, Op-amp and Linear Integrated Circuits, PHI, pp- 298-310, Apr. 2002Google Scholar
  11. 11.
    T.S. Rathore, Digital Measurement Techniques, Narosa, pp. 120–122, 2005Google Scholar
  12. 12.
    X. F. Wania, D. A. Johns, and A.S. Sedra, “Programmable multiplexed switched-capacitor filters,” Electron. Lett., vol. 26, no. 14, pp. 1051-1053, Jul. 2002CrossRefGoogle Scholar
  13. 13.
    D. B. Cox, L. T. Lin, R.S. Florek, and H. F. Tseng, “A real-time programmable SC filter, ” IEEE J. Solid-State Circuits, vol. SC-15, no. 6, pp. 972-977, Dec. 1980CrossRefGoogle Scholar
  14. 14.
    M. A. Mazidi, J. G. Mazidi, and R. McKinlay, The 8085 Microcontroller and Embedded Systems, Pearson Education, UK, 2008Google Scholar

Copyright information

© Springer India Pvt. Ltd 2011

Authors and Affiliations

  • Ajay Lahane
    • 1
  • Swapnali G. Gharat
    • 2
  • Uday Pandit Khot
    • 3
  1. 1.U.M.I.T, S.N.D.T. UniversityMumbaiIndia
  2. 2.I.I.T. BombayMumbaiIndia
  3. 3.Thadomal Shahani Engineering College,MumbaiIndia

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