JPS5647122A - Automatic channel selector - Google Patents

Automatic channel selector

Info

Publication number
JPS5647122A
JPS5647122A JP12261679A JP12261679A JPS5647122A JP S5647122 A JPS5647122 A JP S5647122A JP 12261679 A JP12261679 A JP 12261679A JP 12261679 A JP12261679 A JP 12261679A JP S5647122 A JPS5647122 A JP S5647122A
Authority
JP
Japan
Prior art keywords
level
circuit
broadcast
signal level
noise
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
JP12261679A
Other languages
Japanese (ja)
Other versions
JPS5932924B2 (en
Inventor
Takao Miyazaki
Satoru Tazaki
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP12261679A priority Critical patent/JPS5932924B2/en
Publication of JPS5647122A publication Critical patent/JPS5647122A/en
Publication of JPS5932924B2 publication Critical patent/JPS5932924B2/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)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To make invariably excellent reception possible by selecting an excellent broadcast wave by evaluating broadcast waves in terms of both signal levels and noise levels. CONSTITUTION:The output of noise level detecting circuit 9 is compared to a reference level by comparing circuit 16. When a noise level is high, timer 21 is put into operation to decide the noise level again a certain time later and when it is high again, tuning circuit 10 receives the next broadcast. The output of signal level detecting circuit 8, on the other hand, is inputted to comparing circuits 17 and 18. Comparing circuit 17 decides whether a sufficiently large signal level arrives by making a comparison to a setpoint. Comparing circuit 18 makes a comparison with a setpoint low enough for difficult listening. Then, a broadcast which has the highest signal level or whose signal level and noise level are not too low is selected. Under inferior reception conditions, muting operation is done.
JP12261679A 1979-09-26 1979-09-26 automatic channel selection device Expired JPS5932924B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12261679A JPS5932924B2 (en) 1979-09-26 1979-09-26 automatic channel selection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12261679A JPS5932924B2 (en) 1979-09-26 1979-09-26 automatic channel selection device

Publications (2)

Publication Number Publication Date
JPS5647122A true JPS5647122A (en) 1981-04-28
JPS5932924B2 JPS5932924B2 (en) 1984-08-11

Family

ID=14840355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12261679A Expired JPS5932924B2 (en) 1979-09-26 1979-09-26 automatic channel selection device

Country Status (1)

Country Link
JP (1) JPS5932924B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0434038U (en) * 1990-07-17 1992-03-19
JPH04103024U (en) * 1991-02-15 1992-09-04 株式会社ケンウツド RDS receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0434038U (en) * 1990-07-17 1992-03-19
JPH04103024U (en) * 1991-02-15 1992-09-04 株式会社ケンウツド RDS receiver

Also Published As

Publication number Publication date
JPS5932924B2 (en) 1984-08-11

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