说明：  用fpga实现的DA转换器，有说明和源码，VDHL文件。 A PLD Based Delta-Sigma DAC Delta-Sigma modulation is the simple, yet powerful, technique responsible for the extraordinary performance and low cost of today s audio CD players. The simplest Delta-Sigma DAC consists of a Delta-Sigma modulator and a one bit DAC. Since, both of these components can be realized using digital circuits, it is possible to implement a low precision Delta-Sigma DAC using a PLD.
(Using FPGA to achieve the DA converter, has descriptions and source code, VDHL document. A PLD Based Delta-Sigma DACDelta-Sigma modulation is the simple, yet powerful, technique responsible for the extraordinaryperformance and low cost of today s audio CDplayers. The simplest Delta-Sigma DAC consists of aDelta-Sigma modulator and a one bit DAC. Since , both of these components can be realized usingdigital circuits, it is possible to implement a lowprecision Delta-Sigma DAC using a PLD.)