JPS5481012A - Receiver of automatic tuning - Google Patents

Receiver of automatic tuning

Info

Publication number
JPS5481012A
JPS5481012A JP14812377A JP14812377A JPS5481012A JP S5481012 A JPS5481012 A JP S5481012A JP 14812377 A JP14812377 A JP 14812377A JP 14812377 A JP14812377 A JP 14812377A JP S5481012 A JPS5481012 A JP S5481012A
Authority
JP
Japan
Prior art keywords
sweep
output
frequency
signal
slowing down
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
JP14812377A
Other languages
Japanese (ja)
Other versions
JPS615291B2 (en
Inventor
Isao Akitake
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 JP14812377A priority Critical patent/JPS5481012A/en
Publication of JPS5481012A publication Critical patent/JPS5481012A/en
Publication of JPS615291B2 publication Critical patent/JPS615291B2/ja
Granted 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)

Abstract

PURPOSE:To stop the sweep at the location present for the broad-cast station surely, by once slowing down the sweep speed of the sweep signal generating circuit with the DC signal obtained by rectifying the output of the broad band intermediate frequency filter and stopping the sweep with the stop signal. CONSTITUTION:When sweep operation is made and the frequency closes to the frequency of the broadcast station, an output is apperared at the filter 4. The output of the rectifier 12 is increased inversely proportional to the deturning frequency. When the DC output voltage is more than the threshold voltage, the selection circuit 13 generates the first control signal, slowing down the sweep speed of the sweep signal generator 10. The output of the rectifying circuit 9 connected to the band pass filter 6 causes the second control signal from the stop signal generating circuit 11, stopping the sweep. Since the method once slowing down the sweep speed is taken, until the first control signal is appeared, the sweep speed can be quickened.
JP14812377A 1977-12-12 1977-12-12 Receiver of automatic tuning Granted JPS5481012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14812377A JPS5481012A (en) 1977-12-12 1977-12-12 Receiver of automatic tuning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14812377A JPS5481012A (en) 1977-12-12 1977-12-12 Receiver of automatic tuning

Publications (2)

Publication Number Publication Date
JPS5481012A true JPS5481012A (en) 1979-06-28
JPS615291B2 JPS615291B2 (en) 1986-02-17

Family

ID=15445763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14812377A Granted JPS5481012A (en) 1977-12-12 1977-12-12 Receiver of automatic tuning

Country Status (1)

Country Link
JP (1) JPS5481012A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821918A (en) * 1981-08-03 1983-02-09 Oki Electric Ind Co Ltd Receiving system
JPS6223610A (en) * 1985-07-24 1987-01-31 Yaesu Musen Co Ltd Receiver circuit
JPS62271515A (en) * 1986-05-20 1987-11-25 Sanyo Electric Co Ltd Channel selection data preset device for voltage synthesizer tuner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821918A (en) * 1981-08-03 1983-02-09 Oki Electric Ind Co Ltd Receiving system
JPS6223610A (en) * 1985-07-24 1987-01-31 Yaesu Musen Co Ltd Receiver circuit
JPS62271515A (en) * 1986-05-20 1987-11-25 Sanyo Electric Co Ltd Channel selection data preset device for voltage synthesizer tuner

Also Published As

Publication number Publication date
JPS615291B2 (en) 1986-02-17

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