Feed-forward compensated high switching speed digital phase-locked loop frequency synthesizer. - Benyong Zhang; Philip E. Allen (ISCAS (4), 1999)

A fast switching PLL frequency synthesizer with an on-chip passive discrete-time loop filter in 0.25-μm CMOS. - Benyong Zhang; Phillip E. Allen; Jeff M. Huard (IEEE J. Solid State Circuits, 2003)