JPS5728432A - Frequency controlling circuit - Google Patents

Frequency controlling circuit

Info

Publication number
JPS5728432A
JPS5728432A JP10407380A JP10407380A JPS5728432A JP S5728432 A JPS5728432 A JP S5728432A JP 10407380 A JP10407380 A JP 10407380A JP 10407380 A JP10407380 A JP 10407380A JP S5728432 A JPS5728432 A JP S5728432A
Authority
JP
Japan
Prior art keywords
frequency
oscillator
output
variable
variable frequency
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
JP10407380A
Other languages
Japanese (ja)
Inventor
Kazuo Yano
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10407380A priority Critical patent/JPS5728432A/en
Publication of JPS5728432A publication Critical patent/JPS5728432A/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

Landscapes

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

Abstract

PURPOSE:To achieve frequency control without the production of unnecessay wave, by comparing the output mixing outputs of the 1st and 2nd variable frequency oscillators with a mixer having multiplying function, with a reference oscillator output, and controlling the frequency of the 2nd variable frequency oscillator with the compared output. CONSTITUTION:The frequency Fa of the 1st variable frequency oscillator 1a and the frequency Fb of the 2nd variable frequency oscillator 1b are mixed at a mixer 2 to obtain mFa+ or -nFb. This output is compared with the frequency FR of a reference oscillator 4 at a comparator 3, and an output according to the frequency shift is picked up via a low-pass filter 5 to control the oscillator 1b. Thus, the frequency of the oscillator 1b can be shifted by the same shift amount in interlocking with the frequency shift DELTAFa of the oscillator 1a.
JP10407380A 1980-07-29 1980-07-29 Frequency controlling circuit Pending JPS5728432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10407380A JPS5728432A (en) 1980-07-29 1980-07-29 Frequency controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10407380A JPS5728432A (en) 1980-07-29 1980-07-29 Frequency controlling circuit

Publications (1)

Publication Number Publication Date
JPS5728432A true JPS5728432A (en) 1982-02-16

Family

ID=14370973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10407380A Pending JPS5728432A (en) 1980-07-29 1980-07-29 Frequency controlling circuit

Country Status (1)

Country Link
JP (1) JPS5728432A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016141A (en) * 1973-06-13 1975-02-20
JPS5125012A (en) * 1974-08-27 1976-03-01 Sharp Kk Pll oshoshita shinsesaizashikisojushinki

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016141A (en) * 1973-06-13 1975-02-20
JPS5125012A (en) * 1974-08-27 1976-03-01 Sharp Kk Pll oshoshita shinsesaizashikisojushinki

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