CA1025138A - Automatic tuning apparatus - Google Patents

Automatic tuning apparatus

Info

Publication number
CA1025138A
CA1025138A CA232,549A CA232549A CA1025138A CA 1025138 A CA1025138 A CA 1025138A CA 232549 A CA232549 A CA 232549A CA 1025138 A CA1025138 A CA 1025138A
Authority
CA
Canada
Prior art keywords
automatic tuning
tuning apparatus
automatic
tuning
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.)
Expired
Application number
CA232,549A
Other languages
English (en)
French (fr)
Inventor
Hajime Suzuki
Kazufumi Ushijima
Shigeru Wakamoto
Yoshiaki Sakauchi
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Application granted granted Critical
Publication of CA1025138A publication Critical patent/CA1025138A/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
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/24—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using varactors, i.e. voltage variable reactive diodes
    • H03J7/26—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using varactors, i.e. voltage variable reactive diodes in which an automatic frequency control circuit is brought into action after the scanning action has been stopped
    • 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
CA232,549A 1974-12-17 1975-07-30 Automatic tuning apparatus Expired CA1025138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14704774A JPS5345252B2 (th) 1974-12-17 1974-12-17

Publications (1)

Publication Number Publication Date
CA1025138A true CA1025138A (en) 1978-01-24

Family

ID=15421293

Family Applications (1)

Application Number Title Priority Date Filing Date
CA232,549A Expired CA1025138A (en) 1974-12-17 1975-07-30 Automatic tuning apparatus

Country Status (7)

Country Link
US (1) US4008437A (th)
JP (1) JPS5345252B2 (th)
CA (1) CA1025138A (th)
DE (1) DE2535305C3 (th)
FR (1) FR2310031A1 (th)
GB (1) GB1511359A (th)
IT (1) IT1042098B (th)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5173815A (ja) * 1974-12-24 1976-06-26 Fujitsu Ten Ltd Jidodochojushinki
JPS5181611U (th) * 1974-12-24 1976-06-30
US4245348A (en) * 1977-05-27 1981-01-13 General Research Of Electronics, Inc. Center frequency tuning system for radio-frequency signal receiver
JPS5456701A (en) * 1977-10-14 1979-05-08 Sanyo Electric Co Ltd Preset receiving device
JPS593891B2 (ja) * 1979-01-17 1984-01-26 ソニー株式会社 受信検出回路
JPS57171822A (en) * 1981-04-15 1982-10-22 Pioneer Electronic Corp Automatic channel selector of tuner
EP0341238B1 (en) * 1987-01-02 1993-12-08 Motorola, Inc. Automatic antenna tuning system for portable communication devices
CN115933237B (zh) * 2022-12-16 2024-07-09 业成科技（成都）有限公司 显示装置及其操作方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042439A1 (de) * 1970-08-27 1972-03-02 Wachholz W Schaltungsanordnung zur automatischen Sendersuche und automatischen Scharfabstimmung in einem Hochfrequenzempfanger
GB1379759A (en) * 1970-12-07 1975-01-08 Matsushita Electric Ind Co Ltd Electrical tuning system
US3798553A (en) * 1971-02-09 1974-03-19 Matsushita Electric Ind Co Ltd Frequency sweep device having two alternately swept oscillators
CA1040331A (en) * 1972-11-09 1978-10-10 Takeo Fukuda Channel selection system for tv receiver set
CA1019855A (en) * 1973-06-08 1977-10-25 Yasuhiro Yamada Automatic tuning apparatus

Also Published As

Publication number Publication date
GB1511359A (en) 1978-05-17
FR2310031B1 (th) 1978-04-07
DE2535305A1 (de) 1976-07-15
IT1042098B (it) 1980-01-30
JPS5345252B2 (th) 1978-12-05
US4008437A (en) 1977-02-15
DE2535305B2 (de) 1979-08-09
FR2310031A1 (fr) 1976-11-26
DE2535305C3 (de) 1980-04-10
JPS5171011A (th) 1976-06-19

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