首页>
外国专利>
Direct digital synthesizer, reference frequency generating device, and sine wave outputting method
Direct digital synthesizer, reference frequency generating device, and sine wave outputting method
展开▼
机译:直接数字合成器,参考频率生成装置和正弦波输出方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A DDS achieved in size and cost reductions by removing a ROM for storing a table and the like and suppressing an operation amount is provided. A DDS includes an NCO, a DAC, and a BPF. The NCO outputs a sawtooth wave. The DAC converts either one of the sawtooth wave outputted from the NCO and a triangle wave signal converted by a waveform converting circuit based on the sawtooth wave, from a digital signal into an analog signal. The BPF receives the signal converted into the analog signal by the DAC and extracts a sine wave at a predetermined frequency from the inputted signal, by allowing a signal at a frequency within a fixed range to pass therethrough.
展开▼