JPS5573141A - Pll frequency synthesizer - Google Patents

Pll frequency synthesizer

Info

Publication number
JPS5573141A
JPS5573141A JP14690478A JP14690478A JPS5573141A JP S5573141 A JPS5573141 A JP S5573141A JP 14690478 A JP14690478 A JP 14690478A JP 14690478 A JP14690478 A JP 14690478A JP S5573141 A JPS5573141 A JP S5573141A
Authority
JP
Japan
Prior art keywords
frequency
oscillator
output
beat
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
JP14690478A
Other languages
Japanese (ja)
Other versions
JPS5854683B2 (en
Inventor
Koichi Oshima
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.)
Anritsu Corp
Original Assignee
Anritsu 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 Anritsu Corp filed Critical Anritsu Corp
Priority to JP53146904A priority Critical patent/JPS5854683B2/en
Publication of JPS5573141A publication Critical patent/JPS5573141A/en
Publication of JPS5854683B2 publication Critical patent/JPS5854683B2/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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Landscapes

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

Abstract

PURPOSE:To avoid the step-out by deciding the height relation between the output signal frequency of the voltage control oscillator and the frequency of the 2nd input signal and then to give the control to the transmission of the beat frequency signal to the digital phase comparator. CONSTITUTION:The 1st and 2nd input signals are applied to input terminals 1 and 2. The output frequency of voltage control oscillator 4 receives the beat-down by the 2nd frequency at mixer 5 and then is sent to gate 11. While the output frequency of oscillator 4 receives a comparison of the height with the 2nd frequency through digital phase comparator 10. And in case the output frequency of oscillator 4 is higher than the 2nd frequency, gate 11 is opened for application of the beat frequency signal to comparator 8. As a result, oscillator 4 is controlled to secure the synchronism. While in case the output frequency is lower than the 2nd frequency, gate 11 closes to inhibit the input of the beat frequency to comparator 8. And the output frequency of oscillator 4 is raised higher than the 2nd frequency for acquisition of the synchronism.
JP53146904A 1978-11-28 1978-11-28 PLL frequency synthesizer Expired JPS5854683B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53146904A JPS5854683B2 (en) 1978-11-28 1978-11-28 PLL frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53146904A JPS5854683B2 (en) 1978-11-28 1978-11-28 PLL frequency synthesizer

Publications (2)

Publication Number Publication Date
JPS5573141A true JPS5573141A (en) 1980-06-02
JPS5854683B2 JPS5854683B2 (en) 1983-12-06

Family

ID=15418192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53146904A Expired JPS5854683B2 (en) 1978-11-28 1978-11-28 PLL frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS5854683B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862106A (en) * 1987-04-20 1989-08-29 Anritsu Corporation Signal generating apparatus using PLL circuit
JP2011097382A (en) * 2009-10-30 2011-05-12 Hioki Ee Corp Frequency synthesizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862106A (en) * 1987-04-20 1989-08-29 Anritsu Corporation Signal generating apparatus using PLL circuit
JP2011097382A (en) * 2009-10-30 2011-05-12 Hioki Ee Corp Frequency synthesizer

Also Published As

Publication number Publication date
JPS5854683B2 (en) 1983-12-06

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