JPS5566142A - Automatic frequency control unit - Google Patents

Automatic frequency control unit

Info

Publication number
JPS5566142A
JPS5566142A JP9194578A JP9194578A JPS5566142A JP S5566142 A JPS5566142 A JP S5566142A JP 9194578 A JP9194578 A JP 9194578A JP 9194578 A JP9194578 A JP 9194578A JP S5566142 A JPS5566142 A JP S5566142A
Authority
JP
Japan
Prior art keywords
frequency
circuit
vco10
nfx
output
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
JP9194578A
Other languages
Japanese (ja)
Other versions
JPS6334661B2 (en
Inventor
Shigenobu Aihara
Isao Haga
Motoo Mizumura
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 JP9194578A priority Critical patent/JPS5566142A/en
Publication of JPS5566142A publication Critical patent/JPS5566142A/en
Publication of JPS6334661B2 publication Critical patent/JPS6334661B2/ja
Granted 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
    • H03L7/08—Details of the phase-locked loop

Abstract

PURPOSE:To ensure the automatic frequency control over a wide band by eliminating the elements giving the band limitation from the pulse generator circuit and the switching circuit. CONSTITUTION:Voltage control oscillator VCO10 generates frequency fV which varies in response to the control signal sent from digital frequency discriminator 15. In addition to VCO10, crystal oscillator 11 is provided to oscillates the high frequency signal of reference frequency fX. Using the output of oscillator 11 as the input, the repetitive frequency identical to frequency fX is obtained, and the pulse row containing higher harmonic component nfX of frequency fX is generated from pulse generator circuit 12. This pulse row of circuit 12 is applied to switching circuit 13 to give switching to output frequency fV of VCO10, and then differential frequency component nfX-fV is delivered to the output of circuit 13. The output of circuit 13 is applied to discriminator 15, and the frequency discrimination is given to component nfX-fV based on oscillation frequency fO of crystal oscillator 16. Thus component nfX-fV is supplied in the form of the control signal of VCO10.
JP9194578A 1978-07-26 1978-07-26 Automatic frequency control unit Granted JPS5566142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9194578A JPS5566142A (en) 1978-07-26 1978-07-26 Automatic frequency control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9194578A JPS5566142A (en) 1978-07-26 1978-07-26 Automatic frequency control unit

Publications (2)

Publication Number Publication Date
JPS5566142A true JPS5566142A (en) 1980-05-19
JPS6334661B2 JPS6334661B2 (en) 1988-07-12

Family

ID=14040719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9194578A Granted JPS5566142A (en) 1978-07-26 1978-07-26 Automatic frequency control unit

Country Status (1)

Country Link
JP (1) JPS5566142A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509360A (en) * 1973-05-23 1975-01-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509360A (en) * 1973-05-23 1975-01-30

Also Published As

Publication number Publication date
JPS6334661B2 (en) 1988-07-12

Similar Documents

Publication Publication Date Title
JPS57164620A (en) Phase comparator
JPS53129570A (en) Crystal oscillator circuit
JPS5566142A (en) Automatic frequency control unit
JPS5255361A (en) Variable frequency oscillator
JPS5486256A (en) Frequency control circuit
JPS55114006A (en) Synchronous type crystal oscillator
JPS5335466A (en) Variable frequency oscillator circuit
JPS56105524A (en) Phase synchronizing device
SU847497A1 (en) Controllable pulse renerator
JPS5767312A (en) Band pass filter following frequency
JPS55150028A (en) Clock circuit for digital operation processor
JPS57103419A (en) Notch rejecting filter
JPS55127735A (en) Phase synchronizing oscillator
JPS57211857A (en) Signal generating circuit
JPS5397759A (en) Phase synchronizing circuit
JPS52115153A (en) Phase lead-in oscillator
JPS5660117A (en) Synchronous oscillation afc system
JPS5753154A (en) Multifrequency signal generator
JPS5448164A (en) Package method for pulse generator
JPS5357730A (en) Voltage-control-type oscillation circuit
JPS56128018A (en) Phase comparating circuit
JPS5341194A (en) Output frequency control system for atomic oscillator
JPS52108759A (en) Voltage control type oscillator
JPS57144483A (en) Operating clock generating circuit of timepiece device
JPS57135555A (en) Phase continuous fsk modulating circuit