High speed, high accuracy fractional-N frequency synthesizer using nested mixed-radix digital Δ-Σ modulators. - Michael Peter Kennedy; Brian Fitzgibbon; Austin Harney; Hyman Shanan; Mike Keaveney (ESSCIRC, 2013)

0.3-4.3 GHz Frequency-Accurate Fractional-N Frequency Synthesizer With Integrated VCO and Nested Mixed-Radix Digital Δ-Σ Modulator-Based Divider Controller. - Michael Peter Kennedy; Hongjia Mo; Brian Fitzgibbon; Austin Harney; Hyman Shanan; Mike Keaveney (IEEE J. Solid State Circuits, 2014)