Current mode elliptic filter design based on symmetrical current switching
Current mode elliptic filter design based on symmetrical current switching
This paper describes a current-mode elliptic filter structure based on dual OTAs and grounded capacitors. The filter is capable of producing both lowpass and highpass-notch responses without changing the filter structure. This is achieved using a symmetrical current switching technique based on two switches controlled with a 2-bit digital word. The proposed filter structure forms a basic 2nd-order building block in the design of high-order elliptic filters with tunable frequency response. To confirm the theoretical analysis, simulated and measured results of 4th-order elliptic lowpass and highpass filters with tunable bandwidth in the range of 0.65MHz to 1.3MHz are included. Finally, detailed analysis of the OTA non-ideal parameters on the filter performance is presented and an example is given.
163-77
Dudek, F.
7bc8ba9b-e5c9-413e-ab8a-39f5154276b3
Al-Hashimi, B.M.
0b29c671-a6d2-459c-af68-c4614dce3b5d
Moniri, M.
90c91a89-08f2-4f99-8651-cc6e13a262e8
February 2000
Dudek, F.
7bc8ba9b-e5c9-413e-ab8a-39f5154276b3
Al-Hashimi, B.M.
0b29c671-a6d2-459c-af68-c4614dce3b5d
Moniri, M.
90c91a89-08f2-4f99-8651-cc6e13a262e8
Dudek, F., Al-Hashimi, B.M. and Moniri, M.
(2000)
Current mode elliptic filter design based on symmetrical current switching.
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Conference or Workshop Item
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Abstract
This paper describes a current-mode elliptic filter structure based on dual OTAs and grounded capacitors. The filter is capable of producing both lowpass and highpass-notch responses without changing the filter structure. This is achieved using a symmetrical current switching technique based on two switches controlled with a 2-bit digital word. The proposed filter structure forms a basic 2nd-order building block in the design of high-order elliptic filters with tunable frequency response. To confirm the theoretical analysis, simulated and measured results of 4th-order elliptic lowpass and highpass filters with tunable bandwidth in the range of 0.65MHz to 1.3MHz are included. Finally, detailed analysis of the OTA non-ideal parameters on the filter performance is presented and an example is given.
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More information
Published date: February 2000
Organisations:
Electronic & Software Systems
Identifiers
Local EPrints ID: 251552
URI: http://eprints.soton.ac.uk/id/eprint/251552
PURE UUID: 2d504789-2e25-4f9b-8456-f478c68a7c49
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Date deposited: 07 Dec 1999
Last modified: 10 Dec 2021 20:22
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Contributors
Author:
F. Dudek
Author:
B.M. Al-Hashimi
Author:
M. Moniri
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