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A 13-bit resolution ROM-less direct digital frequency synthesizer based on a trigonometric quadruple angle formula

机译:基于三角四边角公式的13位分辨率,无ROM的直接数字频率合成器

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摘要

A ROM-less direct digital frequency synthesizer employing trigonometric quadruple angle formula is present in this paper. The worse case spectral purity is better than -130 dBc. The amplitude resolution is up to 13 bits, while the phase resolution is 12 bits. Neither any scaling table nor error correction tables are required. The maximum error is mathematically analyzed. The word length of each multiplier is carefully selected in the digital implementation such that the error range is circumscribed and the resolution is preserved.
机译:本文提出了一种采用三角四重角公式的无ROM直接数字频率合成器。最坏的情况是频谱纯度高于-130 dBc。幅度分辨率最高为13位,而相位分辨率为12位。不需要任何缩放表或纠错表。对最大误差进行数学分析。在数字实现方式中,每个乘法器的字长都经过精心选择,以限制误差范围并保持分辨率。

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