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JPS56125119A - Microwave phase synchronizing oscillator - Google Patents

Microwave phase synchronizing oscillator

Info

Publication number
JPS56125119A
JPS56125119A JP2876780A JP2876780A JPS56125119A JP S56125119 A JPS56125119 A JP S56125119A JP 2876780 A JP2876780 A JP 2876780A JP 2876780 A JP2876780 A JP 2876780A JP S56125119 A JPS56125119 A JP S56125119A
Authority
JP
Japan
Prior art keywords
phase
oscillation
amplifier
positive feedback
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.)
Granted
Application number
JP2876780A
Other languages
Japanese (ja)
Other versions
JPS6249770B2 (en
Inventor
Takeshi Takano
Shunichi Kasahara
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
Original Assignee
Fujitsu Ltd
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 filed Critical Fujitsu Ltd
Priority to JP2876780A priority Critical patent/JPS56125119A/en
Publication of JPS56125119A publication Critical patent/JPS56125119A/en
Publication of JPS6249770B2 publication Critical patent/JPS6249770B2/ja
Granted 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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To enable to take the phase lock stably, even if the loop gain of the oscillation circuit is lowered, by making smooth the oscillation waveform, through the provision of the positive feedback in which a DC amplifier is provided with a voltage limiting circuit. CONSTITUTION:The output of the quartz oscillator 1 is multiplied at a high order multipiler 2 into a microwave signal, and the reference signal phase thetai of this signal is in phase comparison with the oscillation signal phase thetao at the phase detector 3, and positive feedback operation is repetitively made at an amplifier 5 until thetai thetao. This amplifier 5 is provided with a positive feedback circuit consisting of a variable resistor RV, resistor 6 and capacitor 7, and also with a voltage limiting circuit in which two diodes D1, D2 are antiparallel-connected. Further, the oscillated waveform is made smooth with the diodes D1, D2 so that the phase lock can stably be taken even if the gain of the oscillation loop is lowered.
JP2876780A 1980-03-07 1980-03-07 Microwave phase synchronizing oscillator Granted JPS56125119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2876780A JPS56125119A (en) 1980-03-07 1980-03-07 Microwave phase synchronizing oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2876780A JPS56125119A (en) 1980-03-07 1980-03-07 Microwave phase synchronizing oscillator

Publications (2)

Publication Number Publication Date
JPS56125119A true JPS56125119A (en) 1981-10-01
JPS6249770B2 JPS6249770B2 (en) 1987-10-21

Family

ID=12257552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2876780A Granted JPS56125119A (en) 1980-03-07 1980-03-07 Microwave phase synchronizing oscillator

Country Status (1)

Country Link
JP (1) JPS56125119A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047307U (en) * 1983-09-08 1985-04-03 アンリツ株式会社 PLL circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157276A (en) * 1974-11-15 1976-05-19 Fujitsu Ltd
JPS524153A (en) * 1975-06-27 1977-01-13 Fujitsu Ltd Pull-in circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157276A (en) * 1974-11-15 1976-05-19 Fujitsu Ltd
JPS524153A (en) * 1975-06-27 1977-01-13 Fujitsu Ltd Pull-in circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047307U (en) * 1983-09-08 1985-04-03 アンリツ株式会社 PLL circuit
JPH0418257Y2 (en) * 1983-09-08 1992-04-23

Also Published As

Publication number Publication date
JPS6249770B2 (en) 1987-10-21

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