JPS5459817A - Automatic preset channel selector - Google Patents

Automatic preset channel selector

Info

Publication number
JPS5459817A
JPS5459817A JP12573877A JP12573877A JPS5459817A JP S5459817 A JPS5459817 A JP S5459817A JP 12573877 A JP12573877 A JP 12573877A JP 12573877 A JP12573877 A JP 12573877A JP S5459817 A JPS5459817 A JP S5459817A
Authority
JP
Japan
Prior art keywords
preset
oscillation frequency
counter
oscillator
memory contents
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
JP12573877A
Other languages
Japanese (ja)
Other versions
JPS6015167B2 (en
Inventor
Toshinori Murata
Shigeo Matsuura
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 JP12573877A priority Critical patent/JPS6015167B2/en
Publication of JPS5459817A publication Critical patent/JPS5459817A/en
Publication of JPS6015167B2 publication Critical patent/JPS6015167B2/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
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To facilitate an easy preset and to prevent the tuning shift after end of the preset to perform the display of the channel number by sweeping the local oscillation frequency at the channel selection time and stopping the sweepage when the coincidence is obtained between the count value of the counter and the memory contents. CONSTITUTION:Electronic tuner 1 contains the voltage control type local oscillator, sweeps the oscillation frequency of the oscillator via tuning voltage sweeper 6, and transmits the output of the oscillator to filter 2 composed of elastic surface wave element SAW. Here, the local oscillation frequency is swept in sequence at each reception band at the preset time, and the data of counter 5 along with the band information are written into memory 7 via tuning signal detector circuit 9. And the memory contents is read out at the channel selection time for channel display 15, and also the local oscillation frequency is swept to stop the sweepage when the coincidence is obtained between the count value of counter 5 and the memory contents. Thus, the preset is facilitated with no tuning shift after preset, and the channel number can be displayed automatically.
JP12573877A 1977-10-21 1977-10-21 Automatic preset tuning device Expired JPS6015167B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12573877A JPS6015167B2 (en) 1977-10-21 1977-10-21 Automatic preset tuning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12573877A JPS6015167B2 (en) 1977-10-21 1977-10-21 Automatic preset tuning device

Publications (2)

Publication Number Publication Date
JPS5459817A true JPS5459817A (en) 1979-05-14
JPS6015167B2 JPS6015167B2 (en) 1985-04-18

Family

ID=14917555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12573877A Expired JPS6015167B2 (en) 1977-10-21 1977-10-21 Automatic preset tuning device

Country Status (1)

Country Link
JP (1) JPS6015167B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62202168U (en) * 1986-06-12 1987-12-23

Also Published As

Publication number Publication date
JPS6015167B2 (en) 1985-04-18

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