JPS55134531A - Automatic frequency control system - Google Patents

Automatic frequency control system

Info

Publication number
JPS55134531A
JPS55134531A JP4204479A JP4204479A JPS55134531A JP S55134531 A JPS55134531 A JP S55134531A JP 4204479 A JP4204479 A JP 4204479A JP 4204479 A JP4204479 A JP 4204479A JP S55134531 A JPS55134531 A JP S55134531A
Authority
JP
Japan
Prior art keywords
frequency
circuit
jump
output
much
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
JP4204479A
Other languages
Japanese (ja)
Other versions
JPS598087B2 (en
Inventor
Kenichi Sasaki
Yoshiki Shirochi
Tsutomu Kaneko
Mitsuo Yokoyama
Shuichi Sasaoka
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.)
RADIO RES LAB
YUSEISHO DENPA KENKYUSHO
Oki Electric Industry Co Ltd
Original Assignee
RADIO RES LAB
YUSEISHO DENPA KENKYUSHO
Oki Electric Industry 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 RADIO RES LAB, YUSEISHO DENPA KENKYUSHO, Oki Electric Industry Co Ltd filed Critical RADIO RES LAB
Priority to JP4204479A priority Critical patent/JPS598087B2/en
Publication of JPS55134531A publication Critical patent/JPS55134531A/en
Publication of JPS598087B2 publication Critical patent/JPS598087B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0091—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with means for scanning over a band of frequencies

Abstract

PURPOSE:To shorten the time of synchronization by reducing sweeps in time by allowing a local oscillator to give a jump and sweep as much as a fixed frequency by providing carrier signals detecting circuits at appropriate frequency intervals. CONSTITUTION:Five carrier signal detecting circuits 6 of f-2, f-1, f0, f1, and f2 are provided. When the output of mixer 1, i.e., a signal of a difference frequency between high-frequency reception signal frequency (f) and local oscillator 2 is detected at f1, for example, of circuit 6 through sweep operations 2 and 11, detection output DETf1 is supplied to control circuit 11 via jump frequency value output circuit 7 and circuit 11 gives oscillator 2 a jump in the direction of frequency f0 as much as a frequency value, preset corresponding to each circuit 6, namely, a frequency difference of ¦f0-f1¦ in this case through relative operations of circuits 7 and 11, jump frequency value correcting circuit 8, and voltage adding circuit 3.
JP4204479A 1979-04-09 1979-04-09 Automatic frequency control method Expired JPS598087B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4204479A JPS598087B2 (en) 1979-04-09 1979-04-09 Automatic frequency control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4204479A JPS598087B2 (en) 1979-04-09 1979-04-09 Automatic frequency control method

Publications (2)

Publication Number Publication Date
JPS55134531A true JPS55134531A (en) 1980-10-20
JPS598087B2 JPS598087B2 (en) 1984-02-22

Family

ID=12625120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4204479A Expired JPS598087B2 (en) 1979-04-09 1979-04-09 Automatic frequency control method

Country Status (1)

Country Link
JP (1) JPS598087B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152717A (en) * 1983-02-18 1984-08-31 Sony Corp Channel selecting circuit of pll frequency synthesizer system
JPH044615A (en) * 1990-04-23 1992-01-09 Pioneer Electron Corp Radio receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152717A (en) * 1983-02-18 1984-08-31 Sony Corp Channel selecting circuit of pll frequency synthesizer system
JPH0524686B2 (en) * 1983-02-18 1993-04-08 Sony Corp
JPH044615A (en) * 1990-04-23 1992-01-09 Pioneer Electron Corp Radio receiver

Also Published As

Publication number Publication date
JPS598087B2 (en) 1984-02-22

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