Patent ID: 9450566
Filing Date: 2016-09-20
CPC Classification: H03H

Claim Text:
1. An apparatus for performing sharp programmable filtering, comprising: an analog front end configured for receiving an electronic signal prior to receipt by a sampler, or analog to digital converter; a passive or active continuous-time filter, comprising a combination of equivalent memory-less elements which are resistive or conductive, and memory elements which are capacitive or inductive, within said analog front end; one or more of said equivalent resistive or conductive elements as variable or switched resistive or conductive circuits having equivalent resistance or conductance configured for being varied through a range of values; and a control circuit for said switched or variable equivalent resistive or conductive elements to continuously vary their equivalent resistance or conductance in said continuous-time filter during the time period between successive sampling instances for the sampler or analog to digital converter; wherein said control circuit continuously varies the resistive or conductive contribution of said equivalent resistive or conductive elements in said passive or active continuous-time filter in a repeating manner with a repetition rate F