发明名称 |
Low spurious direct digital synthesizer |
摘要 |
A direct digital synthesizer for generating an output signal within a frequency band. The direct digital synthesizer comprises an input section for receiving a phase differential value and generating a phase angle value. A phase-amplitude converter generates an amplitude value in response to the phase angle value. A band-shaped dither generator generates a dither value. A first combiner sums the amplitude value and the dither value to define a first combined value. A second combiner differences the amplitude value and the dither value to define a second combined value. A first digital-to-analog converter (DAC) converts the first combined value to a first analog signal. A second digital-to-analog converter (DAC) converts the second combined value to a second analog signal. An output combiner combines the first analog signal and the second analog signal to generate the output signal.
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申请公布号 |
US6522176(B1) |
申请公布日期 |
2003.02.18 |
申请号 |
US20010998836 |
申请日期 |
2001.11.15 |
申请人 |
ITT MANUFACTURING ENTERPRISES, INC. |
发明人 |
DAVIS BRIAN M. |
分类号 |
G06F1/03;H03B21/00;H03L;H03M1/06;(IPC1-7):H03B21/00 |
主分类号 |
G06F1/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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