JPS56169436A - Oscillator - Google Patents

Oscillator

Info

Publication number
JPS56169436A
JPS56169436A JP7257080A JP7257080A JPS56169436A JP S56169436 A JPS56169436 A JP S56169436A JP 7257080 A JP7257080 A JP 7257080A JP 7257080 A JP7257080 A JP 7257080A JP S56169436 A JPS56169436 A JP S56169436A
Authority
JP
Japan
Prior art keywords
output
signal
controlled oscillator
voltage controlled
subtractor
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
JP7257080A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Iwasako
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7257080A priority Critical patent/JPS56169436A/en
Publication of JPS56169436A publication Critical patent/JPS56169436A/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
    • 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
    • H03L7/181—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 numerical count result being used for locking the loop, the counter counting during fixed time intervals

Landscapes

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

Abstract

PURPOSE:To obtain the output corresponding to numerals from the outside, by counting the output signal which is selectively changed over for a plurality of series circuits consisting of a low-pass filter and a voltage controlled oscillator, and supplying the output which is the result of comparison between the output signal and the externally set value through the reference pulse signal to the series circuits, after conversion into an analog signal. CONSTITUTION:The output of a voltage controlled oscillator 13 which is selected in the T1 synchronism of a reference pulse signal Ps, is fed to a counter 16 via an inhibition gate 15 and supplied to a subtractor 17 after 1/N frequency-division. On the other hand, a set numeral M1 is fed to the subtractor 17 via a switch S3 to obtain an error signal corresponding to the difference of numerals of both the signals. This signal is converted into an analog signal at a D/A converter 20 and fed to the voltage controlled oscillator 13 as a control signal via an LPF11. Further, the switches S1-S3 are switched to a reverse state as shown in the figure at the next synchronism of the frequence pulse signal Ps, and the difference between the output of a voltage controlled oscillator 14 and the set value M2 is counted at the subtractor 17, and the output frequency of the voltage controlled oscillator 14 can be controlled independently of the M1 at the set value M2.
JP7257080A 1980-05-30 1980-05-30 Oscillator Pending JPS56169436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7257080A JPS56169436A (en) 1980-05-30 1980-05-30 Oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7257080A JPS56169436A (en) 1980-05-30 1980-05-30 Oscillator

Publications (1)

Publication Number Publication Date
JPS56169436A true JPS56169436A (en) 1981-12-26

Family

ID=13493156

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7257080A Pending JPS56169436A (en) 1980-05-30 1980-05-30 Oscillator

Country Status (1)

Country Link
JP (1) JPS56169436A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5227026A (en) * 1975-08-25 1977-03-01 Aidlin Joseph W Novel coating composition and method of coating metal surface with said composition
JPS54850A (en) * 1977-06-03 1979-01-06 Nec Corp Digital afc circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5227026A (en) * 1975-08-25 1977-03-01 Aidlin Joseph W Novel coating composition and method of coating metal surface with said composition
JPS54850A (en) * 1977-06-03 1979-01-06 Nec Corp Digital afc circuit

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