论文标题
全数字基于FPGA的DAC，没有或几个外部组件
All-Digital FPGA-based DAC with None or Few External Components
论文作者
论文摘要
混合信号设计的众多局限性之一是对电路的想法进行物理测试。虽然使用FPGA测试数字电路更容易，但通常无法使用混合信号电路进行。尽管某些FPGA具有内置的类似物对数字和数字到Analog转换器，但常规的商业FPGA开发板和低成本FPGA缺乏内置数据转换器。在这里，我们引入了全数字基于FPGA的DAC，这是实现混合信号实验的主要块之一。 DAC可以完全在FPGA中合成，不需要使用外部组件。此外，为了扩展其应用范围，还提供了有关拟议DAC问题和可能的解决方案的讨论。 4位和5位DAC证实的实验证明证实了这项工作中开发的理论分析。这项工作还表明了一个计划，其中包括很少的外部电阻来提高线性性（DNL $ \ leq $ 0.25LSB和INL $ \ leq $ 0.5LSB）和功耗（比独立配置的5倍提高）。
One of the many limitations with the mixed-signal design is physically testing circuit ideas. While it is easier to test digital circuits with FPGAs, this can not be done usually with mixed-signal circuits. Although some FPGAs have built-in analog-to-digital and digital-to-analog converters, regular commercial FPGAs development boards and low-cost FPGAs lack built-in data converters. Here we introduce an all-digital FPGA-based DAC, which is one of the main blocks to enable mixed-signal experiments. The DAC can be synthesized entirely in an FPGA and does not require the use of external components. Furthermore, and to extend its range of applications, a discussion regarding the proposed DAC's problems and possible solutions is presented. Experimental demonstration of a 4-bit and a 5-bit DAC corroborate the theoretical analysis developed in this work. This work also suggests a scheme which includes few external resistors to improve the linearity (DNL$\leq$0.25LSB and an INL$\leq$0.5LSB), and the power consumption (5X improvement over the standalone configuration).
