A circuit including a DC-FM phase locked loop

A DC-FM phase locked loop is provided for use in transmitters for measuring and control purposes, wherein the modulation signal controls, via an A/D converter (11), the output frequency (14) of a frequency synthesizer (13), this output frequency being used as the reference for the phase comparator (...

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Bibliographic Details
Main Author SCHUTZ, JOHANN
Format Patent
LanguageEnglish
French
German
Published 25.03.1987
Subjects
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
MODULATION
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Summary:A DC-FM phase locked loop is provided for use in transmitters for measuring and control purposes, wherein the modulation signal controls, via an A/D converter (11), the output frequency (14) of a frequency synthesizer (13), this output frequency being used as the reference for the phase comparator (6). This permits modulation with extremely low frequencies or DC without the necessity to interrupt the loop.
Bibliography:Application Number: EP19860307046