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Design of Low-Pass Tunable Complex Heterodyne Filters

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2 Author(s)
Soderstrand, Michael A. ; Univ. of California, Davis ; Cho, G.Y.

Low-pass filters with tunable cut-off frequencies are useful in variable-bandwidth communication systems, zero-crossing detection circuits and many other applications. The complex heterodyne approach that has been applied to band-pass and notch filters, can also be applied to design low-pass and high- pass tunable filters. Using a half-band fixed filter as the prototype, the complex heterodyne approach yields a fully tunable low-pass filter that can tune the cut-off frequency from nearly DC to the Nyquist frequency.

Published in:

Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on

Date of Conference:

4-7 Nov. 2007

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