KOBLINGSANORDNING TIL KORREKSJON AV FREKVENSFEIL VED EN OVERFOERING AV DATA

摘要

A circuit arrangement is disclosed for correcting frequency errors during a transmission of data by means of data signals which are modulated according to a frequency-differential phase modulation. The circuit arrangement corrects frequency errors which occur during the transmission of the data signals from a data transmitter to a data receiver. The data receiver contains a regulating stage inside which the data signals are converted with the assistance of mixed signals. A repetition frequency of the mixed signals is regulated with the assistance of a first regulating unit performing a fine regulation and a second regulating unit performing a coarse regulation in such a way that frequency errors of the data signals are corrected. A regulator generates the mixed signals from timing pulses of given repetition frequency with the assistance of frequency multipliers. The frequency multipliers are controlled by regulating signals which optionally switch through a selection unit to the regulator from either the first regulating unit or the second regulating unit.