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Patent Searching and Data


Title:
HIGH SPEED FILTER
Document Type and Number:
WIPO Patent Application WO2002060261
Kind Code:
A3
Abstract:
An electronic filter operates as a correlator that provides a discrete approximation of an analog signal (Figure 1, 10, 11, 12, 13). The analog to digital conversion is integrated directly approximation calculation. An array of sample and hold circuits or single bit comparators provide outputs to a series of multipliers, the other input of which is a coefficient value of a Fourier series approximation of the desired frequency response. Each of the sample and hold circuits samples sequentially in time and holds its sample until the next cycle. Thus the sample point rotates in time through the array and each new sample is multiplied by a different coefficient. The output of the multipliers is summed for evaluation.

Inventors:
MALLINSON MARTIN
Application Number:
US0202172W
Publication Date:
October 17, 2002
Filing Date:
January 26, 2002
Export Citation:
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Assignee:
ESS TECHNOLOGY, INC.
International Classes:
H03M1/12; G06G7/19; H03H17/06; (IPC1-7): G01S5/08; H04B7/185
Foreign References:
US4161033A1979-07-10
US4403331A1983-09-06
US4550415A1985-10-29
US5021793A1991-06-04
US4580224A1986-04-01
US5463657A1995-10-31
US4667203A1987-05-19
US5384574A1995-01-24
US5754603A1998-05-19
US4860018A1989-08-22
US5194871A1993-03-16
US4870422A1989-09-26
US5469469A1995-11-21
US5537435A1996-07-16
US6111911A2000-08-29
US5014327A1991-05-07
US6141373A2000-10-31
US6154486A2000-11-28
US5999561A1999-12-07
Other References:
See also references of EP 1356313A2
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