发明名称 |
Low-power direct digital frequency synthesizer architecture |
摘要 |
A direct digital frequency synthesizer for generating a digital sine or cosine function waveform receive digital input. Memory stores digital samples along portions of sine and cosine function waveforms. The memory outputs the digital samples in response to a first portion of the digital input. Control logic is responsive to the digital input and controls the output of the digital samples from the memory to allow digital samples along a complete cycle of the sine or cosine function waveform to be output even though only portions of the sine and cosine function waveforms are stored in the memory. A linear interpolator receives a second portion of the digital input and modifies digital samples output by the memory to generate intermediate digital samples between the digital samples stored in the memory to improve accuracy.
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申请公布号 |
US5999581(A) |
申请公布日期 |
1999.12.07 |
申请号 |
US19950537299 |
申请日期 |
1995.09.29 |
申请人 |
UNIVERSITY OF WATERLOO |
发明人 |
BELLAOUAR, ABDELLATIF;OBRECHT, MICHAEL S.;ELMASRY, MOHAMED I. |
分类号 |
G06F1/035;(IPC1-7):H04L23/00 |
主分类号 |
G06F1/035 |
代理机构 |
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地址 |
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