JPS56169435A - Phase synchronization oscillator - Google Patents

Phase synchronization oscillator

Info

Publication number
JPS56169435A
JPS56169435A JP7310080A JP7310080A JPS56169435A JP S56169435 A JPS56169435 A JP S56169435A JP 7310080 A JP7310080 A JP 7310080A JP 7310080 A JP7310080 A JP 7310080A JP S56169435 A JPS56169435 A JP S56169435A
Authority
JP
Japan
Prior art keywords
phase
output
vco24
vco21
output signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7310080A
Other languages
Japanese (ja)
Inventor
Masao Ogino
Kunikatsu Yoshii
Hiroshi Igarashi
Kazuyoshi Ichikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Japan Broadcasting Corp
Original Assignee
Fujitsu Ltd
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd, Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Fujitsu Ltd
Priority to JP7310080A priority Critical patent/JPS56169435A/en
Publication of JPS56169435A publication Critical patent/JPS56169435A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To make the oscillating circuit of both systems to the same constitution completely, by enabling to produce two output signals in phase synchronism individually and at the some time through the use of two PLL ocillators. CONSTITUTION:An output signal of a voltage controlled oscillator VCO21 is fed back to a phase detector 22 and it is in phase comparison with the output signal of a VCO24. The output of the phase detector 22 is fed to the VCO21 via an LPF23 to control the oscillating frequency. On the other hand, the output of the VCO24 is fed back to a phase comparator 25 and it is compared for the phase with the output signal of the VCO21, and the output of the phase comparator 25 is converted into a DC signal via an LPF26 to control the frequency of the VCO24. Thus, if the characteristics of two PLL oscillators are equal, the oscillating frequency of the VCOs 21 and 24 is converged to (f1+DELTAf1/2) respectively and finally. Thus, independent signals having the frequencies of f1+DELTAf1 and f1 can be obtained from the terminals No.1 and No.2, respectively.
JP7310080A 1980-05-31 1980-05-31 Phase synchronization oscillator Pending JPS56169435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7310080A JPS56169435A (en) 1980-05-31 1980-05-31 Phase synchronization oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7310080A JPS56169435A (en) 1980-05-31 1980-05-31 Phase synchronization oscillator

Publications (1)

Publication Number Publication Date
JPS56169435A true JPS56169435A (en) 1981-12-26

Family

ID=13508563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7310080A Pending JPS56169435A (en) 1980-05-31 1980-05-31 Phase synchronization oscillator

Country Status (1)

Country Link
JP (1) JPS56169435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02134022A (en) * 1988-11-15 1990-05-23 Fujitsu Ltd Dual system for clock generating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02134022A (en) * 1988-11-15 1990-05-23 Fujitsu Ltd Dual system for clock generating circuit

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