Mit einem einen Gleichanteil aufweisenden Modulationssignal modulierbare PLL-Schaltung
Date Issued
1995
Author(s)
Heuberger, A.
Wallrapp, L.
Seitzer, D.
Patent No
1992-4214385
Abstract
A PLL circuit which can be modulated by a modulation circuit comprising a DC component has a voltage- controlled main oscillator, a loop divider, a phase comparator and a loop filter. The comparison frequency signal for the phase comparator is derived from the modulation signal by a first compensation filter which is followed by a voltage-controlled reference oscillator and a reference divider. The voltage- controlled main oscillator is controlled by the modulation signal via a second compensation filter followed by a data lowpass filter.