Patent ID: 6130590
Filing Date: 2000-10-10
Classification: H03H

Abstract:
A programmable filter bank for filtering a received input signal to produce a filtered output signal, comprising:a plurality of selectable interconnected filter elements, each said filter element having a predefined resonance frequency, and said plural filter elements being arranged in a non-contiguous frequency sequence;a selector connected to each of said plural filter elements and operable to select at least one filter element of said plurality of filter elements to receive said input signal and produce a desired overall frequency response as a predefined function of said resonance frequency of said selected at least one filter element;a controller for applying said overall frequency response to the input signal to produce the filtered output signal;a first controller configuration for configuring said plurality of filter elements to emulate a notch filter, comprising circuitry for causing said selector to select a portion of said plural filter elements, said portion comprising:a second plurality of said filter elements selected to produce a first frequency response; anda third plurality of said filter elements selected to produce a second frequency response, higher than said first frequency response, so that a frequency gap is formed between said first and second frequency responses, thereby producing a notch filter overall frequency response.