Patent ID: 9264019
Filing Date: 2016-02-16
CPC Classification: H03H

Claim Text:
1. A method of designing a finite impulse response filter for removing fixed pattern jitter from a signal having a desired output frequency, the filter having a delay line containing a plurality of delay elements, comprising: selecting a desired peak frequency response for the filter; selecting a plurality of elements having impedances, one element to be coupled to the delay line after each delay element, the values of the elements selected to determine their impedances so that the filter is the equivalent of two filters, a first filter having a peak output frequency at the desired output frequency or a band pass range that includes the desired output frequency, and a second filter in which the signal is delayed by a time equal to half of a period of a different frequency which is desired to be removed from the output signal; and providing an output connected to all of the impedance elements.