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JPS56110331A - Automatic tracking compensation circuit for electronic tuner - Google Patents

Automatic tracking compensation circuit for electronic tuner

Info

Publication number
JPS56110331A
JPS56110331A JP1258980A JP1258980A JPS56110331A JP S56110331 A JPS56110331 A JP S56110331A JP 1258980 A JP1258980 A JP 1258980A JP 1258980 A JP1258980 A JP 1258980A JP S56110331 A JPS56110331 A JP S56110331A
Authority
JP
Japan
Prior art keywords
output
signal
frequency
tuning
constitution
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
JP1258980A
Other languages
Japanese (ja)
Inventor
Yasuta Uehara
Yoshinori Sato
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.)
Fujitsu General Electronics Ltd
Original Assignee
General Denshi Kogyo KK
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 General Denshi Kogyo KK filed Critical General Denshi Kogyo KK
Priority to JP1258980A priority Critical patent/JPS56110331A/en
Publication of JPS56110331A publication Critical patent/JPS56110331A/en
Pending 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
    • H03J7/08—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 using varactors, i.e. voltage variable reactive diodes

Abstract

PURPOSE:To ensure control for the bias voltage and then correct the tracking error of a receiver, by varying the vias voltage applied to the variable capacity diode of a tuning element and thus detecting the best tuning frequency. CONSTITUTION:A variable capacity diode is used for the tuning element of the antenna tuning circuit 2 and the high-frequency tuning circuit 3' respectively. The intermediate frequency signal is detected 22 and receives the wave detection 24 for the intermeidate frequency amplifier circuit 5 of a receiver having such constitution as mentioned above, thus obtaining a DC output. The maximum value of the DC output is detected, and the level of the output is kept at 25. Then the signal of the peak level holding means 25 is compared at 27 with the DC output with respect to their levels to obtain a control signal. The bias voltage of the variable diode is varied at 14 by the signal supppied from the channel selection control means 13, and the working of the voltage varying means 14 is controlled by the control signal.
JP1258980A 1980-02-05 1980-02-05 Automatic tracking compensation circuit for electronic tuner Pending JPS56110331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1258980A JPS56110331A (en) 1980-02-05 1980-02-05 Automatic tracking compensation circuit for electronic tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1258980A JPS56110331A (en) 1980-02-05 1980-02-05 Automatic tracking compensation circuit for electronic tuner

Publications (1)

Publication Number Publication Date
JPS56110331A true JPS56110331A (en) 1981-09-01

Family

ID=11809535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1258980A Pending JPS56110331A (en) 1980-02-05 1980-02-05 Automatic tracking compensation circuit for electronic tuner

Country Status (1)

Country Link
JP (1) JPS56110331A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59114443A (en) * 1982-12-21 1984-07-02 Agency Of Ind Science & Technol Method and apparatus for detecting crack of fragile material
JPS61146026U (en) * 1985-02-28 1986-09-09
JPS63229907A (en) * 1987-03-19 1988-09-26 Sanyo Electric Co Ltd Automatic tracking adjusting circuit
US4862516A (en) * 1987-01-02 1989-08-29 Motorola, Inc. System for automatically tuning the antenna of a miniature portable communications device
EP0469001A1 (en) * 1989-03-28 1992-02-05 Telefind Corporation Paging receiver with continuously tunable antenna and rf amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039801A (en) * 1973-08-11 1975-04-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039801A (en) * 1973-08-11 1975-04-12

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59114443A (en) * 1982-12-21 1984-07-02 Agency Of Ind Science & Technol Method and apparatus for detecting crack of fragile material
JPS61146026U (en) * 1985-02-28 1986-09-09
US4862516A (en) * 1987-01-02 1989-08-29 Motorola, Inc. System for automatically tuning the antenna of a miniature portable communications device
JPS63229907A (en) * 1987-03-19 1988-09-26 Sanyo Electric Co Ltd Automatic tracking adjusting circuit
EP0469001A1 (en) * 1989-03-28 1992-02-05 Telefind Corporation Paging receiver with continuously tunable antenna and rf amplifier
EP0469001A4 (en) * 1989-03-28 1992-12-02 Telefind Corporation Paging receiver with continuously tunable antenna and rf amplifier

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