Title :
Design of Low-Pass Tunable Complex Heterodyne Filters
Author :
Soderstrand, Michael A. ; Cho, Grace Yoona
Author_Institution :
Univ. of California, Davis
Abstract :
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.
Keywords :
high-pass filters; low-pass filters; notch filters; Nyquist frequency; bandpass filters; halfband fixed filter; highpass tunable filters; lowpass tunable complex heterodyne filter; notch filters; variable-bandwidth communication systems; zero crossing detection circuits; Adaptive filters; Attenuation; Band pass filters; Clocks; Cutoff frequency; Interference; Low pass filters; Narrowband; Prototypes; Tunable circuits and devices;
Conference_Titel :
Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4244-2109-1
Electronic_ISBN :
1058-6393
DOI :
10.1109/ACSSC.2007.4487368