| 摘要 |
The present invention proposes a digital-to-analog converter device, comprising an input means for inputting a digital signal of n-bit width to said device, a digital-to-analog converter means (1) adapted to output an analog signal corresponding to the input n-bit signal, and is characterized by a signal processing means (4, 6) supplied with said n-bit digital signal and adapted to output an (m+1)-bit digital signal to said digital-to-analog converter means (1), with n > m+1, said digital-to-analog converter means (1) being designed for an (m+1)-bit digital-to-analog conversion. The present invention also proposes a corresponding method. Thus, the present invention adopts a feed forward arrangement for signal processing. This virtually increases the resolution of the used digital-to-analog conversion means to n-bits, although only (m+1)-bits are used, with n > m+1. No increase in DAC clocking frequency is needed. The reduction in the word size of a digital-to-analog converter means results in silicon area savings for integrated circuit implementation, and power consumption decrease. |
