Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters
The Kerwin-Huelsman Newcomb (KHN) biquad is the natural choice for use as a ‘universal’ filter building block out of the several existing 3-amplifier biquadratic filter sections based on the two integrator loop or state variable realization of 2nd order systems. A modified version of the KHN biquad,...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
1995-01-01
|
| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/1995/78209 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832547478991273984 |
|---|---|
| author | Umesh Kumar P. Bhushan Mital |
| author_facet | Umesh Kumar P. Bhushan Mital |
| author_sort | Umesh Kumar |
| collection | DOAJ |
| description | The Kerwin-Huelsman Newcomb (KHN) biquad is the natural choice for use as a ‘universal’ filter building block out of the several existing 3-amplifier biquadratic filter sections based on the two integrator loop or state variable realization of 2nd order systems. A modified version of the KHN
biquad, which is electronically tunable almost linearly over a decade range of center frequency, is
presented. For electronic tunability, instead of the direct use of a FET as a voltage variable resistance
to control the time constants of the integrators, a novel approach of using voltage-controlled variable-gain
amplifiers at the inputs of both the integrators and one immediately after the input signal has been
suggested. The circuit is suitable for use as a tunable universal filtering module and can be easily
digitally programmed. |
| format | Article |
| id | doaj-art-09b44e934ce8436f9035febfd111a86b |
| institution | Kabale University |
| issn | 0882-7516 1563-5031 |
| language | English |
| publishDate | 1995-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Active and Passive Electronic Components |
| spelling | doaj-art-09b44e934ce8436f9035febfd111a86b2025-02-03T06:44:25ZengWileyActive and Passive Electronic Components0882-75161563-50311995-01-011827310910.1155/1995/78209Design, Fabrication, and Comparative Study of Electronically Tunable Active FiltersUmesh Kumar0P. Bhushan Mital1IETE Department of Electrical Engg., IIT, New Delhi Pin-110076, IndiaDepartment of Electronics & Communication Engg., C.R. State College of Engineering, Murthal (Sonepat) , Pin-131039, IndiaThe Kerwin-Huelsman Newcomb (KHN) biquad is the natural choice for use as a ‘universal’ filter building block out of the several existing 3-amplifier biquadratic filter sections based on the two integrator loop or state variable realization of 2nd order systems. A modified version of the KHN biquad, which is electronically tunable almost linearly over a decade range of center frequency, is presented. For electronic tunability, instead of the direct use of a FET as a voltage variable resistance to control the time constants of the integrators, a novel approach of using voltage-controlled variable-gain amplifiers at the inputs of both the integrators and one immediately after the input signal has been suggested. The circuit is suitable for use as a tunable universal filtering module and can be easily digitally programmed.http://dx.doi.org/10.1155/1995/78209 |
| spellingShingle | Umesh Kumar P. Bhushan Mital Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters Active and Passive Electronic Components |
| title | Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters |
| title_full | Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters |
| title_fullStr | Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters |
| title_full_unstemmed | Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters |
| title_short | Design, Fabrication, and Comparative Study of Electronically Tunable Active Filters |
| title_sort | design fabrication and comparative study of electronically tunable active filters |
| url | http://dx.doi.org/10.1155/1995/78209 |
| work_keys_str_mv | AT umeshkumar designfabricationandcomparativestudyofelectronicallytunableactivefilters AT pbhushanmital designfabricationandcomparativestudyofelectronicallytunableactivefilters |