1
Gerald L Fenderson, Mitchell A Skinner: Method and apparatus for signal-eye tracking in digital transmission systems. Bell Telephone Laboratories Incorporated, David R Padnes, March 8, 1983: US04376309 (39 worldwide citation)

An improvement in tracking the signal-eyes (FIG. 4) formed by a digital signal is disclosed. This improvement is achieved by forming a sample at a regeneration sampling time (e.g., 404), a first sampling time (e.g., 401) and a second sampling time (e.g., 402). The first and second sampling times res ...


2
Gerald L Fenderson, Mitchell A Skinner: Adaptive decision level circuit. Bell Telephone Laboratories Incorporated, David R Padnes, April 20, 1982: US04326169 (7 worldwide citation)

The adaptive decision level circuit (FIG. 3) slices a digital signal with respect to a decision level disposed between the signal levels. A correction signal generated from the sliced signals (S, S) compensates for variations in the signal levels by maintaining the decision level at a constant posit ...