Patent ID: 6232901
Filing Date: 2001-05-15
Classification: H03M

Abstract:
An apparatus, comprising:at least one or more tunable band-pass filter stages in cascade, a first stage receiving an input signal at an input of the apparatus, a last stage providing an output to an output processor;a first set of interstage gain elements, one each being coupled between each of said at least one or more tunable band-pass filter stages;a second set of gain elements, one each being coupled between an input of said first stage and each succeeding one of said at least one or more tunable band-pass filter stages;said output processor for providing signal conversion at an output of the apparatus, and for inverse conversion for one or more feedback outputs; anda feedback loop coupling one or more feedback output signals of the apparatus to each of said at least one or more tunable band-pass filter stages wherein each of said at least one or more tunable band-pass filter stages is tunable to a respective predetermined frequency.