JPS57202116A - Automatic channel selector - Google Patents

Automatic channel selector

Info

Publication number
JPS57202116A
JPS57202116A JP8694281A JP8694281A JPS57202116A JP S57202116 A JPS57202116 A JP S57202116A JP 8694281 A JP8694281 A JP 8694281A JP 8694281 A JP8694281 A JP 8694281A JP S57202116 A JPS57202116 A JP S57202116A
Authority
JP
Japan
Prior art keywords
channel selection
automatic channel
level
broadcast signal
controller
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
JP8694281A
Other languages
Japanese (ja)
Inventor
Akinori Maeda
Shigeki Inoue
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 JP8694281A priority Critical patent/JPS57202116A/en
Publication of JPS57202116A publication Critical patent/JPS57202116A/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
    • H03J7/18—Automatic scanning over a band of frequencies

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To eliminate inconvenience to stop channel selecting operation, by receiving a virtual broadcast signal produced due to intermodulating interference, through the operation of a mutual modulation interference improving means at the automatic channel selection. CONSTITUTION:In case of the automatic channel selection, since a controller 31 outputs ''0'' level to a gain control means 32, a transistor 34 turns off and intermodulation interference improving mode is obtained independently of the state of a high sensitivity reception set switch 24. Thus, when an automatic channel selection is designated with an operation key, since a control signal outputted from a controller 31 to a gain controlling meand 32 goes to ''0'' level from ''1'' level, the gain controlling means 32 is in the intermodulation interference improving mode, no virtural broadcast signal is generated, the inconveience that the virtual broadcast signal is received and the channel selection operation is stopped, can be improved.
JP8694281A 1981-06-08 1981-06-08 Automatic channel selector Pending JPS57202116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8694281A JPS57202116A (en) 1981-06-08 1981-06-08 Automatic channel selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8694281A JPS57202116A (en) 1981-06-08 1981-06-08 Automatic channel selector

Publications (1)

Publication Number Publication Date
JPS57202116A true JPS57202116A (en) 1982-12-10

Family

ID=13900919

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8694281A Pending JPS57202116A (en) 1981-06-08 1981-06-08 Automatic channel selector

Country Status (1)

Country Link
JP (1) JPS57202116A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01103928U (en) * 1987-12-28 1989-07-13

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317211A (en) * 1976-07-31 1978-02-17 Torio Kk Device for eliminating intermodulation disturbance of superheterodyne receiver
JPS5317212A (en) * 1976-07-31 1978-02-17 Torio Kk Device for eliminating intermodulation disturbance of superheterodyne receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317211A (en) * 1976-07-31 1978-02-17 Torio Kk Device for eliminating intermodulation disturbance of superheterodyne receiver
JPS5317212A (en) * 1976-07-31 1978-02-17 Torio Kk Device for eliminating intermodulation disturbance of superheterodyne receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01103928U (en) * 1987-12-28 1989-07-13

Similar Documents

Publication Publication Date Title
EP0078130A3 (en) Automatic loudness controller
JPS5643809A (en) Automatic gain controller
ES8304675A1 (en) A digital automatic gain control circuit.
JPS57202116A (en) Automatic channel selector
JPS52128014A (en) Color signal transmission circuit
JPS5238805A (en) Receiver
JPS57129089A (en) Color television receiver
JPS5614716A (en) Automatic tuning receiver
JPS5596775A (en) Remote control unit
JPS5533326A (en) Remote control device
JPS56122223A (en) Automatic dx and local reception switching device
JPS53139901A (en) Channel selection unit
JPS5478011A (en) Muting circuit
JPS5271928A (en) Receiving and recording unit of tv signals
JPS51120608A (en) Tv transmission automatic gain control system
JPS52100862A (en) Automatic gain control unit
JPS5582543A (en) Fm receiver
JPS53125717A (en) Transmission and reception unit for television signal
JPS55159619A (en) Receiving method of electronic tuning type and its unit
JPS5380123A (en) Television receiver
JPS544501A (en) Preset tuner
JPS5280736A (en) Secam-system color tvpicture receiver
JPS57133730A (en) Squelch system
JPS57184328A (en) Controller for if signal frequency band width of receiver
JPS5546667A (en) Television sound multiplex broadcasting receiver