 Constant k filters , also k @-@ type filters , are a type of electronic filter designed using the image method . They are the original and simplest filters produced by this methodology and consist of a ladder network of identical sections of passive components . Historically , they are the first filters that could approach the ideal filter frequency response to within any prescribed limit with the addition of a sufficient number of sections . However , they are rarely considered for a modern design , the principles behind them having been superseded by other methodologies which are more accurate in their prediction of filter response . 
 Constant k filters , also k @-@ type filters , <a href='drop_aux' title='1'><mark>are</mark></a>a type of electronic filter designed using the image method . They <a href='drop_aux' title='2'><mark>are</mark></a>the original and simplest filters produced by this methodology and consist of a ladder network of identical sections of passive components . Historically , they <a href='drop_aux' title='3'><mark>are</mark></a>the first filters <a href='null_relcl' title='4'><mark>that</mark></a>could approach the ideal filter frequency response to within any prescribed limit with the addition of a sufficient number of sections . However , they are rarely considered for a modern design , the principles behind them <a href='been_done' title='5'><mark>having</mark></a> been superseded by other methodologies which <a href='drop_aux' title='6'><mark>are</mark></a>more accurate in their prediction of filter response . 
Constant k filters , also k @-@ type filters , a type of electronic filter designed using da image method . They tdaoriginal and simplest filters produced by this methodology and consist of a ladder network of identical sections of passive components . Historically , they the first filters could approach the ideal filter frequency response to within any prescribed limit witt thdaddition of a sufficient number of sections . However , they r rarely considered for a modern design , the principles behind em done been superseded by other methodologies which more accurate in their prediction of filter response .