Digital-to-analog converter, transmitter, base station, mobile device and method for a digital-to-analog converter
Abstract:
A Digital-to-Analog Converter (DAC) is provided. The DAC includes a code converter circuit configured to sequentially receive first digital control codes for controlling N digital-to-analog converter cells. N is an integer greater than one. The code converter circuit is further configured to convert the first digital control codes to second digital control codes. Additionally, the DAC includes a bit-shifter circuit configured to receive shift codes for the second digital control codes. The shift codes are obtained using dynamic element matching and indicate a respective circular shift by ri bit positions for the i-th second digital control code, wherein ri is an integer smaller than N−1. The bit-shifter circuit is further configured to generate third digital control codes by circularly shifting the second digital codes based on the shift codes. In addition, the DAC includes a cell activation circuit configured to selectively activate one or more of the N digital-to-analog converter cells based on the third digital control codes.
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