JPS5573142A - Pll frequency synthesizer - Google Patents

Pll frequency synthesizer

Info

Publication number
JPS5573142A
JPS5573142A JP14690578A JP14690578A JPS5573142A JP S5573142 A JPS5573142 A JP S5573142A JP 14690578 A JP14690578 A JP 14690578A JP 14690578 A JP14690578 A JP 14690578A JP S5573142 A JPS5573142 A JP S5573142A
Authority
JP
Japan
Prior art keywords
signal
frequency
height
signals
pulse duration
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
JP14690578A
Other languages
Japanese (ja)
Other versions
JPS5854684B2 (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 JP53146905A priority Critical patent/JPS5854684B2/en
Publication of JPS5573142A publication Critical patent/JPS5573142A/en
Publication of JPS5854684B2 publication Critical patent/JPS5854684B2/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 of the frequency between the output signal of the voltage control oscillator and the 2nd input signal and then giving the control to the transmission of the pulse signal equal to the beat frequency to the phase comparator. CONSTITUTION:The 1st and 2nd input signals are applied to input terminals 1 and 2. Output signal (a) of voltage control oscillator 4 plus 2nd input signal (b) are applied to bistable multi 10. According to the set/reset action of multi 10, pulse signal (c) whose pulse duration tau varies regularly and repetitively with the beat frequency is sent to integrator 11. Then the height of the frequency is decided between signals (a) and (b) according to the direction of variation of the pulse duration of signal (c). And only in case the height relation is normal between those two signals, the signal of the frequency equal to the repetitive frequency of variation for the pulse duration of signal (c) is sent to phase comparator 8. While in case the height relation is not normal, oscillator 4 is put within the synchronism enable range to secure the normal operation.
JP53146905A 1978-11-28 1978-11-28 PLL frequency synthesizer Expired JPS5854684B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53146905A JPS5854684B2 (en) 1978-11-28 1978-11-28 PLL frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53146905A JPS5854684B2 (en) 1978-11-28 1978-11-28 PLL frequency synthesizer

Publications (2)

Publication Number Publication Date
JPS5573142A true JPS5573142A (en) 1980-06-02
JPS5854684B2 JPS5854684B2 (en) 1983-12-06

Family

ID=15418216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53146905A Expired JPS5854684B2 (en) 1978-11-28 1978-11-28 PLL frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS5854684B2 (en)

Also Published As

Publication number Publication date
JPS5854684B2 (en) 1983-12-06

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