Patent ID: 9716482
Date: 2017-07-25
CPC Classifications: H03H

Claim:
1. A method for tuning a filter in a sealed product comprising the steps of: trimming, using a first trimming circuit, a center frequency of the filter, wherein the first trimming circuit is located inside the sealed product; trimming an input signal magnitude of the filter using a second trimming circuit, wherein the second trimming circuit is located inside the sealed product; measuring a performance metric of the filter after trimming the center frequency of the filter and the input signal magnitude of the filter; repeating the trimming steps and the measuring step until a trim code is obtained that tunes the filter for a first physical test condition; and storing, after the filter is tuned, the trim code for the filter on a nonvolatile memory in the sealed product; wherein the sealed product applies the trim code to at least one of the first and second trimming circuits.