Patent ID: 6466147
Filing Date: 2002-10-15
Classification: H03M

Abstract:
A randomized dynamic element matching digital-to-analog converter for converting an N-level digital input signal to an analog output signal corresponding thereto during at least one conversion cycle, including:a. a stochastic barrel shifting encoder including an input and Nâˆ’1 outputs, the input of the stochastic barrel shifting encoder operative to receive the N-level digital signal, and each of the plurality of outputs of the stochastic barrel shifting encoder having a one of a series of unique output addresses; b. a plurality of Nâˆ’1 digital-to-analog converter elements each including an input and an output, with each of the inputs of the digital-to-analog converter elements connected to one Nâˆ’1 of outputs of the stochastic barrel shifting encoder; c. a random number generator operative to generate a random number offset o[n], and connected to provide the random number offset o[n] to the stochastic barrel shifting encoder to be used to determine the first of the plurality of Nâˆ’1 digital-to-analog converter elements to be used during a particular conversion cycle; and d. an analog output summing node connected to the outputs of the plurality of Nâˆ’1 digital-to-analog converter elements in order to receive and sum the analog outputs of the digital-to-analog converter elements to generate an aggregated analog output.