A Si bipolar phase and frequency detector IC for clock extraction up to 8 Gb/s. - Ansgar Pottbacker; Ulrich Langmann; Hans-Ulrich Schreiber (IEEE J. Solid State Circuits, 1992)

An 8 GHz silicon bipolar clock-recovery and data-regenerator IC. - Ansgar Pottbacker; Ulrich Langmann (IEEE J. Solid State Circuits, 1994)