
A reduced complexity digital multi-stage noise shaping (MASH) delta-sigma modulator for fractional-N frequency synthesizer applications is proposed. A long word is used for the first modulator in a MASH structure; the sequence length is maximized by setting the least significant bit of the input to 1; shorter words are used in subsequent stages. Experimental results confirm simulations
Multistage noise shaping, Digital modulation, Digital delta-sigma modulators, Sequence length, Noise shaping
Multistage noise shaping, Digital modulation, Digital delta-sigma modulators, Sequence length, Noise shaping
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