JPS5710522A - Extender of aft drawing range - Google Patents

Extender of aft drawing range

Info

Publication number
JPS5710522A
JPS5710522A JP8396080A JP8396080A JPS5710522A JP S5710522 A JPS5710522 A JP S5710522A JP 8396080 A JP8396080 A JP 8396080A JP 8396080 A JP8396080 A JP 8396080A JP S5710522 A JPS5710522 A JP S5710522A
Authority
JP
Japan
Prior art keywords
aft
circuit
frequency
drawing range
loop
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
JP8396080A
Other languages
Japanese (ja)
Other versions
JPS6053485B2 (en
Inventor
Kazuyoshi Ishii
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP55083960A priority Critical patent/JPS6053485B2/en
Publication of JPS5710522A publication Critical patent/JPS5710522A/en
Publication of JPS6053485B2 publication Critical patent/JPS6053485B2/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
    • H03J7/02—Automatic frequency control

Landscapes

  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To draw in for transmission waves having greater offset carrier and frequency variance, by adding an AFT drawing range extender. CONSTITUTION:A signal automatic changeover circuit 50 is normally closed to the side (a) to form an AFT loop. When the channel is switched, a channel selection start signal S0 is outputted from a channel selection control section 4 and it is given to an AFT drawing range extension circuit 10. At the same time, the circuit 50 is switched to the position (b), and the down/up signal from the circuit 10 becomes S2, S3 to be given to a tuner 1, and the oscillation frequency of the local oscillation is compulsively changed to be closed to a normal tuning frequency. When the frequency is within a range to be drawn in sufficiently with normal AFT loop, the circuit 50 is again changed over to form the first AFT loop to be drawn into the normal tuning frequency.
JP55083960A 1980-06-23 1980-06-23 AFT retraction range expansion device Expired JPS6053485B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55083960A JPS6053485B2 (en) 1980-06-23 1980-06-23 AFT retraction range expansion device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55083960A JPS6053485B2 (en) 1980-06-23 1980-06-23 AFT retraction range expansion device

Publications (2)

Publication Number Publication Date
JPS5710522A true JPS5710522A (en) 1982-01-20
JPS6053485B2 JPS6053485B2 (en) 1985-11-26

Family

ID=13817126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55083960A Expired JPS6053485B2 (en) 1980-06-23 1980-06-23 AFT retraction range expansion device

Country Status (1)

Country Link
JP (1) JPS6053485B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090420A (en) * 1983-10-25 1985-05-21 Sony Corp Channel selection system by wide aft function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090420A (en) * 1983-10-25 1985-05-21 Sony Corp Channel selection system by wide aft function
JPH0518292B2 (en) * 1983-10-25 1993-03-11 Sony Corp

Also Published As

Publication number Publication date
JPS6053485B2 (en) 1985-11-26

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