JPS55128917A - Short wave receiver of automatic tuning system - Google Patents

Short wave receiver of automatic tuning system

Info

Publication number
JPS55128917A
JPS55128917A JP3623779A JP3623779A JPS55128917A JP S55128917 A JPS55128917 A JP S55128917A JP 3623779 A JP3623779 A JP 3623779A JP 3623779 A JP3623779 A JP 3623779A JP S55128917 A JPS55128917 A JP S55128917A
Authority
JP
Japan
Prior art keywords
detection
delivered
signals
signal
wave
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
JP3623779A
Other languages
Japanese (ja)
Other versions
JPS598086B2 (en
Inventor
Youzai Nunomura
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 JP3623779A priority Critical patent/JPS598086B2/en
Publication of JPS55128917A publication Critical patent/JPS55128917A/en
Publication of JPS598086B2 publication Critical patent/JPS598086B2/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 always ensure the automatic selective reception for the frequency wave in the best condition, by securing the sequential and automatic scanning for the reception frequencies of the 1st or 2nd broadcast group. CONSTITUTION:Preset tuner 21 is set to, for example, the three waves of the 1st broadcast group. And now it is supposed that a wave is detected 5, and then detection output (a) is supplied to setting part 8. And in case the detection signal is under the prescribed level, level signal (b) is delivered. Then detection signal (c) is delivered when signal (b) is detected through detection part 9, and then supplied to ring counter 10. Counter 10 counts pulse-type detection signals (c) to deliver the signals through output terminals 10a-10c according to the count value. With these signals delivered, oscillation part 322 has the selective oscillation, and at the same time one of the preset variable capacitor groups is selected. In such way, the best broadcast wave can be received automatically at all times.
JP3623779A 1979-03-29 1979-03-29 Self-tuning shortwave receiver Expired JPS598086B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3623779A JPS598086B2 (en) 1979-03-29 1979-03-29 Self-tuning shortwave receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3623779A JPS598086B2 (en) 1979-03-29 1979-03-29 Self-tuning shortwave receiver

Publications (2)

Publication Number Publication Date
JPS55128917A true JPS55128917A (en) 1980-10-06
JPS598086B2 JPS598086B2 (en) 1984-02-22

Family

ID=12464161

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3623779A Expired JPS598086B2 (en) 1979-03-29 1979-03-29 Self-tuning shortwave receiver

Country Status (1)

Country Link
JP (1) JPS598086B2 (en)

Also Published As

Publication number Publication date
JPS598086B2 (en) 1984-02-22

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