JPS5525204A - Oscillation circuit memorizing vfo frequency - Google Patents

Oscillation circuit memorizing vfo frequency

Info

Publication number
JPS5525204A
JPS5525204A JP9688278A JP9688278A JPS5525204A JP S5525204 A JPS5525204 A JP S5525204A JP 9688278 A JP9688278 A JP 9688278A JP 9688278 A JP9688278 A JP 9688278A JP S5525204 A JPS5525204 A JP S5525204A
Authority
JP
Japan
Prior art keywords
frequency
vfo
vco6
divider
difference
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
JP9688278A
Other languages
Japanese (ja)
Other versions
JPS5850457B2 (en
Inventor
Nobuo Ogawa
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.)
Yaesu Musen Co Ltd
Original Assignee
Yaesu Musen Co 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 Yaesu Musen Co Ltd filed Critical Yaesu Musen Co Ltd
Priority to JP53096882A priority Critical patent/JPS5850457B2/en
Publication of JPS5525204A publication Critical patent/JPS5525204A/en
Publication of JPS5850457B2 publication Critical patent/JPS5850457B2/en
Expired 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

Landscapes

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

Abstract

PURPOSE:To obtain an oscillation circuit which memorizes the frequency of the oscillator capable of a fine adjustment for the specified frequency range such as VFO into another circuit and is capable of regenerating the frequency when necessary. CONSTITUTION:The binary encoded code obtained by measuring the VFO frequency through digital frequency counter 2 is applied to the program input of programable divider 4 through latch 3 and in the standard digit or more and then preset. The difference between reference oscillator 5 and VCO6 frequency is obtained through mixer 7, and the frequency obtained by dividing the above difference at divider 4 is compared with the frequency obtained by dividing the reference frequency at divider 8 through phase comparator 9. With the control voltage obtained the above comparison and detection, VCO6 is controlled. The binary encoded code of under the reference digit of the VFO frequency is changed to the DC control voltage through D/A converter 10 and latch 3' to control VXO (variable frequency crystal oscillator) 11. Then the difference between VCO6 and VXO11 is obtained through mixer 12 and then delivered.
JP53096882A 1978-08-10 1978-08-10 Oscillator circuit that stores VFO frequency Expired JPS5850457B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53096882A JPS5850457B2 (en) 1978-08-10 1978-08-10 Oscillator circuit that stores VFO frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53096882A JPS5850457B2 (en) 1978-08-10 1978-08-10 Oscillator circuit that stores VFO frequency

Publications (2)

Publication Number Publication Date
JPS5525204A true JPS5525204A (en) 1980-02-22
JPS5850457B2 JPS5850457B2 (en) 1983-11-10

Family

ID=14176769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53096882A Expired JPS5850457B2 (en) 1978-08-10 1978-08-10 Oscillator circuit that stores VFO frequency

Country Status (1)

Country Link
JP (1) JPS5850457B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221180A (en) * 1985-07-22 1987-01-29 Konishiroku Photo Ind Co Ltd Fixing device

Also Published As

Publication number Publication date
JPS5850457B2 (en) 1983-11-10

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