Patent ID: 7027502
Filing Date: 2006-04-11
Classification: H03H

Abstract:
1. A method of slewing a bandwidth characteristic of a digital filter within a range between a first bandwidth characteristic and a second bandwidth characteristic, said digital filter including a plurality of cascaded filter sections, each of said plurality of cascaded filter sections having respective coefficients, said method comprising the steps of: establishing a polynomial having an order greater than or equal to two for modeling a changing value of one of said coefficients at said first and second bandwidth characteristics within said range; determining an index value for identifying a desired bandwidth characteristic within said range; inputting said index value into said polynomial to obtain a corresponding coefficient value for said one of said coefficients; and loading said corresponding coefficient value into a respective filter section; wherein each of said plurality of cascaded filter sections is comprised of a second order filter having coefficients a where i is said index value and p terms are predetermined constants.