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FREQUENCY DIVIDER WITH IMPROVED LINEARITY FOR A FRACTIONAL-N SYNTHESIZER USING A MULTI-MODULUS PRESCALER
FREQUENCY DIVIDER WITH IMPROVED LINEARITY FOR A FRACTIONAL-N SYNTHESIZER USING A MULTI-MODULUS PRESCALER
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机译:使用多模预分频器的分数N合成器的线性得到改善的分频器
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摘要
A frequency divider is disclosed. The frequency divider includes a multi-modulus prescaler to perform a frequency division by a modulus M, wherein M is an integer between N and 2*N-1 and N is a power of 2. The frequency divider also includes a programmable counter to output the digital representation of M and an output clock signal. For the frequency divider, M equals N plus D minus DN for each edge of the multi-modulus prescaler output clock CKpr wherein the counter samples the digital representation of D and DN denotes an integer part of D divided by N, and M equals N for each subsequent edge of the prescaler output clock CKpr wherein the counter does not sample the digital representation of D.
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