Patent ID: 7965213
Filing Date: 2011-06-21
Classification: H03M

Abstract:
1. An element-selecting method applied to a Digital to Analog Converter (DAC), wherein the DAC is utilized for converting a multi-bit digital input signal into an analog output signal, the DAC has M converting elements, and N converting element(s) of the M converting elements are selected for performing digital to analog conversion when the DAC receives the multi-bit digital input signal, the element-selecting method comprising: (a) determining a shifting-step according to a first predetermined value when selected numbers corresponding to the M converting elements are different, wherein the selected numbers respectively represent selected times that the M converting elements have been selected for performing the digital to analog conversion; (b) determining the shifting-step according to a number of the M converting elements and the multi-bit digital input signal when the selected numbers corresponding to the M converting elements are all equal; and (c) selecting a converting element from the M converting elements by means of separating the selected converting element from a last selected converting element of the M converting elements by the shifting-step; where M represents a positive integer; N represents an integer and 0≦N≦M.