Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2006-09-12
2006-09-12
Tran, Khai (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S376000
Reexamination Certificate
active
07106812
ABSTRACT:
A CDR circuit arrangement, for example for a transceiver module, features a data recovery unit (4) for the recovery of the data contained in a received signal (DATA) by scanning this received data signal, and a phase evaluation unit for the determination of a suitable phase position for the scanning carried out by the data recovery unit (4). The phase evaluation unit comprises a scanning device (1) for the oversampling of a the received data signal (DATA) in accordance with several different scanning phases (P0–P6), a phase detector device (2) for the evaluation of the scanning values (A0–A6) accordingly prepared by the scanning device (1), in order thereby to derive intermediate signals (UP1–UP3,DN1–DN3), which classify the phase error during the scanning of the data signal by the scanning device (1) in respect of its size and direction of deviation, as well as a filter device (3), in order to subject the intermediate signals (UP1–UP3,DN1–DN3) generated by the phase detector device (2) to a weighted filtering process. In this situation, a setting signal (ΔP) is generated by the filter device (3) for the subsequent regulation and control of the scanning phases (P0–P6) of the scanning device (1).
REFERENCES:
patent: 6055286 (2000-04-01), Wu et al.
patent: 2003/0122600 (2003-07-01), Engl et al.
patent: 2003/0123591 (2003-07-01), Walker
Engl Bernhard
Gregorius Peter
Holme Roberts & Owen LLP
Infineon - Technologies AG
Lillywhite, Esq. Jeffery M.
Seeley, Esq. David O.
Tran Khai
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