Noise shaping digital quantizers, most commonly digital delta-sigma (ΔΣ) modulators, are
used in fractional-N phase-locked loops (PLLs) to enable fractional frequency tuning …

Fractional-N frequency synthesizers contain a divider controller which implements the
fractional division. The interaction between the quantization noise from the divider controller …

Wandering spurs are a little-studied phenomenon seen in MASH and SQ-digital delta–
sigma modulators. They take the form of frequency-modulated spurs which periodically …

Conventionally, a fractional-N synthesizer is simulated using a closed-loop behavioral
model and the simulations can be very time-consuming. With the analysis by Perrott et al., a …

Interaction between the requantizer's periodic output and charge pump mismatch
nonlinearity in a fractional-N frequency synthesizer causes it to exhibit an elevated inband …

The Digital Delta-Sigma Modulator (DDSM) has the disadvantage of presenting a periodic
output for constant inputs, affecting the benefits of noise-shaping modulation. This work uses …

В работе рассмотрены проблемы шумового анализа схем ФАПЧ с дробным делителем
частоты при наличии нелинейных эффектов в токовом ключе. Предложен алгоритм …

Reducing and ultimately eliminating nonlinearity-induced spurious tones (spurs) is a key
motivation for the design of novel divider controllers for fractional-N frequency synthesizers …

According to the frequency emission characteristics and related specifications of Ultra High
Frequency (UHF) radio frequency identification (RFID), the RFID frequency synthesizer puts …

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