Patent ID: 7345490
Filing Date: 2008-03-18
Classification: H03H

Abstract:
1. A method for calibrating a filter, the method comprises: filtering, by the filter, a first signal having a first frequency to produce a first filtered signal, wherein the first frequency is in a known pass region of the filter; measuring signal strength of the first filtered signal to produce a first measured signal strength, filtering, by the filter, a second signal having a second frequency to produce a second filtered signal, wherein the second frequency is at a desired corner frequency of the filter; measuring signal strength of the second filtered signal to produce a second measured signal strength; comparing the first measured signal strength with the second measured signal strength to determine whether the filter has attenuated the second signal by a desired attenuation value with respect to the first signal; and when the filter has not attenuated the second signal by the desired attenuation value with respect to the first signal, adjusting filter response of the filter to produce an adjusted filter response.