Fractional-n frequency synthesizer

A circuit, with applications to phase-locked loops and frequency synthesis, where a divider circuit shuffles between dividing the output of a voltage-controlled oscillator by N or N+1, where N is an integer, and where a phase frequency detector provides three logic signals to a charge pump so that o...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Chou, Gerchih, Lin, Chia-Liang
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY ELECTRICITY
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A circuit, with applications to phase-locked loops and frequency synthesis, where a divider circuit shuffles between dividing the output of a voltage-controlled oscillator by N or N+1, where N is an integer, and where a phase frequency detector provides three logic signals to a charge pump so that one of three values of current may be sourced to a loop filter, with the result that the circuit behaves as a conventional phase-locked loop having a fictitious divider circuit that is capable of dividing the output of the voltage-controlled oscillator by a non-integral value.