发明名称 |
Fractional-N synthesizer with two control words |
摘要 |
A fractional-N frequency synthesizer has a modulus controller with multiple inputs that control an initial output frequency of the frequency synthesizer, an increment of variation of tuning of the frequency synthesizer, and a difference between two adjacent output frequency settings. The fractional frequency synthesizer includes a modulus controller, which controls the modulus factor for a multiple modulus frequency divider. The modulus controller has a modulus selection circuit that provides a modulus control signal to the modulus divider to select the modulus factor of the modulus divider as a function of a sum of one input factor and a product of a second input and the gain factor. Control signal is an overflow from a continuous summation of the second digital data word and a product of the first digital data word and the gain factor digital data word repetitively with itself.
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申请公布号 |
US6836526(B2) |
申请公布日期 |
2004.12.28 |
申请号 |
US20030373465 |
申请日期 |
2003.02.25 |
申请人 |
AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH |
发明人 |
RANA RAM SINGH |
分类号 |
H03K21/00;H03L7/197;(IPC1-7):H03K21/00 |
主分类号 |
H03K21/00 |
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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