JPS55115736A - Automatic frequency control unit - Google Patents

Automatic frequency control unit

Info

Publication number
JPS55115736A
JPS55115736A JP2252779A JP2252779A JPS55115736A JP S55115736 A JPS55115736 A JP S55115736A JP 2252779 A JP2252779 A JP 2252779A JP 2252779 A JP2252779 A JP 2252779A JP S55115736 A JPS55115736 A JP S55115736A
Authority
JP
Japan
Prior art keywords
frequency
transmission
voltage signal
discriminator
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
JP2252779A
Other languages
Japanese (ja)
Other versions
JPS596531B2 (en
Inventor
Kenji Odagiri
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.)
SPC Electronics Corp
Original Assignee
SPC Electronics 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 SPC Electronics Corp filed Critical SPC Electronics Corp
Priority to JP2252779A priority Critical patent/JPS596531B2/en
Publication of JPS55115736A publication Critical patent/JPS55115736A/en
Publication of JPS596531B2 publication Critical patent/JPS596531B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant

Abstract

PURPOSE:To enable to correct the frequency discriminator having variation in the characteristics, by converting the voltage signal adding the output of frequency discriminator and the voltage signal from the sample hold circuit at transmission into transmission frequency. CONSTITUTION:The transmission frequency f2 and the sub-local frequency f3 are mixed at the sub-mixer 14 to output the local frequency (f2+f3), and this local frequency and the transmission frequency are mixed at the main mixer 15 to form the intermediate frequency fIH. This intermediate frequency is converted into a voltage at the frequency discriminator 17 of which center frequency is selected at f3, and it is stored in the sample hold circuit 20 at transmission. The voltage signal from the frequency discriminator 17 and the sample hold circuit 20 at transmission is added at the addition circuit 22, this added voltage signal is fed to the high frequency voltage controlled oscillator 27 to output the transmission frequency f2.
JP2252779A 1979-03-01 1979-03-01 automatic frequency control device Expired JPS596531B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2252779A JPS596531B2 (en) 1979-03-01 1979-03-01 automatic frequency control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2252779A JPS596531B2 (en) 1979-03-01 1979-03-01 automatic frequency control device

Publications (2)

Publication Number Publication Date
JPS55115736A true JPS55115736A (en) 1980-09-05
JPS596531B2 JPS596531B2 (en) 1984-02-13

Family

ID=12085256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2252779A Expired JPS596531B2 (en) 1979-03-01 1979-03-01 automatic frequency control device

Country Status (1)

Country Link
JP (1) JPS596531B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60174632U (en) * 1984-04-27 1985-11-19 日産ディーゼル工業株式会社 Vehicle auto-clutch device
JPS6136446U (en) * 1984-08-08 1986-03-06 日産ディーゼル工業株式会社 Auto clutch device for vehicles
JPS61136044A (en) * 1984-12-04 1986-06-23 Kubota Ltd Method of operating hydraulic clutch in hydraulically operated speed change gear unit
JPS63308225A (en) * 1987-06-08 1988-12-15 Kubota Ltd Operating device for hydraulic clutch
JPS63308226A (en) * 1987-06-10 1988-12-15 Kubota Ltd Controller for hydraulic clutch

Also Published As

Publication number Publication date
JPS596531B2 (en) 1984-02-13

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