FREQUENCY SYNTHESIZER

PURPOSE:To make phase differences between signals to a phase comparator immediately after making power supply coincident with each other, by providing a phase matching circuit which causes the phase of the signal from a variable divider to match with that of a reference signal from a synchronizing t...

Full description

Saved in:
Bibliographic Details
Main Author MURAYAMA YUKIO
Format Patent
LanguageEnglish
Published 26.01.1989
Subjects
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
Online AccessGet full text

Cover

More Information
Summary:PURPOSE:To make phase differences between signals to a phase comparator immediately after making power supply coincident with each other, by providing a phase matching circuit which causes the phase of the signal from a variable divider to match with that of a reference signal from a synchronizing type divider by resetting or presetting the synchronizing type divider in accordance with a signal from the variable divider immediately after the power supply is made. CONSTITUTION:After a switch S1 is turned on and power supply is made, e phase matching circuit 14 receives a dividing signal from a variable divider D and a synchronizing type divider 2 is reset or preset with the dividing signal. A reference signal from the synchronizing type divider 2 and the dividing signal from the variable divider D are inputted to a phase comparator 3 in a state where the phases are matched with each other. Then a switch S0 is closed at desired timing. Therefore, the frequency of a voltage-controlled oscillator 5 does not change immediately after the power supply is turned on.
Bibliography:Application Number: JP19870179495