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delta sigma modulator fractional N
內容有:投影片、論文以及paper 應有盡有
the design considerations
and implementation aspects of a pipelined all-digital fourth-order
multi-stage-noise-shaping (MASH) delta–sigma () modulator
suitable for fractional-N (F-N) phase-locked loop (PLL)
frequency synthesis applications. In an effort to reduce the
hardware complexity and power consumption, the alignment
registers, which are normally required in pipelined adders, are
eliminated by taking advantage of static modulator input. The
MASH modulator has successfully been targeted to an Altera™
field-programmable-gate-array (FPGA) device. The functional
operation of the modulator has been verified through structural
bit-level simulations as well as experimental results on the actual
FPGA implementation.
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