JPS5511629A - Automatic tuning device - Google Patents

Automatic tuning device

Info

Publication number
JPS5511629A
JPS5511629A JP8404078A JP8404078A JPS5511629A JP S5511629 A JPS5511629 A JP S5511629A JP 8404078 A JP8404078 A JP 8404078A JP 8404078 A JP8404078 A JP 8404078A JP S5511629 A JPS5511629 A JP S5511629A
Authority
JP
Japan
Prior art keywords
oscillation frequency
local oscillation
point
malfunction
frequency control
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
JP8404078A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Imoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8404078A priority Critical patent/JPS5511629A/en
Publication of JPS5511629A publication Critical patent/JPS5511629A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE: To secure the normal operation even in case the power switch is made in the state under which the lower adjacent signal exists, by installing the malfunction preventing circuit in the automatic tuning device.
CONSTITUTION: When the power switch is made, the local oscillation frequency of tuner part 1 is controlled to point (b) distant away from the reference local oscillation frequency by fL. While for DC power source 7A of malfunction circuit 7, voltage VH is applied to the local oscillation frequency control element of part 1 by connecting terminal 6 to 7B for an extremely short time after making of the power source. Thus 7A shifts instantaneously to point (d) of the local oscillation frequency opposing to VH. Then 7A is released by connecting terminal 6 to terminal 4 and then reset to the normal circuit comprising turner part 1, video IF amplification part 2 and local oscillation frequency control part 3. In this case, the voltage applied to the local oscillation frequency control element of part 1 lowers down from point (d) on characteristic curve L1 and then controlled to point (e), thus preventing the malfunction.
COPYRIGHT: (C)1980,JPO&Japio
JP8404078A 1978-07-12 1978-07-12 Automatic tuning device Pending JPS5511629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8404078A JPS5511629A (en) 1978-07-12 1978-07-12 Automatic tuning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8404078A JPS5511629A (en) 1978-07-12 1978-07-12 Automatic tuning device

Publications (1)

Publication Number Publication Date
JPS5511629A true JPS5511629A (en) 1980-01-26

Family

ID=13819393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8404078A Pending JPS5511629A (en) 1978-07-12 1978-07-12 Automatic tuning device

Country Status (1)

Country Link
JP (1) JPS5511629A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386020A (en) * 1979-05-10 1983-05-31 Max Planck Gesellschaft Zur Forderung Der Wissenschaften E.V. Process for the production of thermodynamically stable solid ion conductor materials
JPS5972073U (en) * 1982-11-02 1984-05-16 ソニー株式会社 television receiver
JPS6183348U (en) * 1984-11-07 1986-06-02

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50146216A (en) * 1974-05-14 1975-11-22
JPS516026U (en) * 1974-06-29 1976-01-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50146216A (en) * 1974-05-14 1975-11-22
JPS516026U (en) * 1974-06-29 1976-01-17

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386020A (en) * 1979-05-10 1983-05-31 Max Planck Gesellschaft Zur Forderung Der Wissenschaften E.V. Process for the production of thermodynamically stable solid ion conductor materials
JPS5972073U (en) * 1982-11-02 1984-05-16 ソニー株式会社 television receiver
JPS6183348U (en) * 1984-11-07 1986-06-02
JPH0221819Y2 (en) * 1984-11-07 1990-06-12

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