Center frequency controlled phase locked loop system

Center frequency controlled phase locked loop system

A center frequency controlled phase locked loop system includes a primary phase locked loop having a first voltage controlled oscillator including a first voltage to current converter whose output current drives a first current controlled oscillator to produce the primary clock signal to be locked o...

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Hauptverfasser: KOVACS, JANOS, KROESEN, RONALD
Format: Patent
Sprache:eng
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AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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creator KOVACS
JANOS
KROESEN
RONALD
description A center frequency controlled phase locked loop system includes a primary phase locked loop having a first voltage controlled oscillator including a first voltage to current converter whose output current drives a first current controlled oscillator to produce the primary clock signal to be locked onto an input signal; a second phase locked loop having a second voltage controlled oscillator including a second voltage to current converter whose output current drives a second current controlled oscillator to produce the synthesized clock signal whose frequency is approximately that of the input signal or integral multiple thereof; and a current copier circuit for copying the output current from the second voltage to current converter and delivering it to the first current controlled oscillator to maintain the center frequency of the first voltage controlled oscillator at approximately the output frequency of the synthesized clock signal.
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subjects AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title Center frequency controlled phase locked loop system
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