The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 1999
Filed:
Jun. 13, 1997
George S Moschytz, Zurich, CH;
Globespan Technologies, Inc., Red Bank, NJ (US);
Abstract
The present invention provides a higher order filter with low sensitivity to component values and to a method of designing the same. The higher order filter is constructed of second and/or third order filter circuits which have been desensitized with respect to component values and gain by impedance tapering the filter circuits. The filter circuits are impedance tapered by successively scaling the resistors and/or capacitors from left to right to minimize loading on the first filter section and to maximize the quality factor of the passive pole. The impedance of the filter sections is increased from left to right by increasing the resistor values and/or by decreasing the capacitor values from left to right. Once the lower order filter circuits have been designed, they are cascaded to provide a higher order filter with low sensitivity to component values and gain.