摘要 |
A multibit data converter has an output parallel unit element converter (108) fed by a multibit signal, and noise shaping dynamic element matching (DEM) apparatus for selectively activating units in the converter. The DEM apparatus includes a plurality of noise shaping components (501, 601, 701). Each components has as an input one signal to the converter, and each includes a first integrator (506, 512) having as its input the input to the component, and a second integrator (514, 518) having as its input the output of the first integrator, and forms one or more component outputs. A signal in the second integrator is clipped (516). A vector quantizer (510, 610, 710) orders the component outputs and activates converter elements according to the ordering. |