US 6,983,136 B2 | ||
Directly tuned filter and method of directly tuning a filter | ||
Ralph Mason, Ottawa (Canada); and Chris DeVries, Ottawa (Canada) | ||
Assigned to Eno Semiconductor Inc., Ottawa (Canada) | ||
Filed on Sep. 17, 2002, as Appl. No. 10/244,558. | ||
Claims priority of application No. 2357491 (CA), filed on Sep. 17, 2001. | ||
Prior Publication US 2003/0054783 A1, Mar. 20, 2003 | ||
Int. Cl. H04B 1/10 (2006.01) |
U.S. Cl. 455—307 | 19 Claims |
1. A method of tuning an analog filter comprising:
a) filtering an input signal with the analog filter to produce a filtered signal, the input signal being such that the filtered
signal has a frequency response representative of that of the analog filter;
b) performing an analog-to-digital conversion on the filtered signal to produce digital filtered signal samples;
c) processing the digital filtered signal samples to determine at least one characterizing filter parameter;
d) adjusting the analog filter based on the analog at least one characterizing filter parameter; and
e) providing the input signal with substantially flat spectral density
f) repeatedly performing steps (a) through (e) until the characterizing filter parameters satisfies at least one objective.
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