JPS5620345A - Fm stereophonic tuner circuit - Google Patents

Fm stereophonic tuner circuit

Info

Publication number
JPS5620345A
JPS5620345A JP9590979A JP9590979A JPS5620345A JP S5620345 A JPS5620345 A JP S5620345A JP 9590979 A JP9590979 A JP 9590979A JP 9590979 A JP9590979 A JP 9590979A JP S5620345 A JPS5620345 A JP S5620345A
Authority
JP
Japan
Prior art keywords
circuit
signal
path
deciding
over
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
JP9590979A
Other languages
Japanese (ja)
Other versions
JPS6221423B2 (en
Inventor
Tetsuya Toyama
Shuzo Doi
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.)
Onkyo Corp
Original Assignee
Onkyo Corp
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 Onkyo Corp filed Critical Onkyo Corp
Priority to JP9590979A priority Critical patent/JPS5620345A/en
Publication of JPS5620345A publication Critical patent/JPS5620345A/en
Publication of JPS6221423B2 publication Critical patent/JPS6221423B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
    • H04H40/72—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for noise suppression
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/24—Automatic control in frequency-selective amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To attain invariably excellent reception by deciding the carrier level of a stereophonic signal by a deciding circuit and then by using the decided carrier level to change-over an input to a high-frequency amplifier depending upon whether mutual interference occurs or not. CONSTITUTION:The 1st signal path 1 that leads an input signal from an antenna to direct high-frequency amplifying circuit 3 and the 2nd signal path 2 that connets it to circuit 3 via multistage tuning circuit 2' are provided and it is made possible to change paths 1 and 2 over through change-over circuit 10. An output signal from this amplifying circuit 3 is applied to IF amplifier 6 via mixer 4 and its IF signal is applied to FM demodulator 7 and also to deciding circuit 9 to decide a carrier level. At a mutual modulation disturbance level, tuning circuit 2' connected to the path 2 side excludes modulation disturbance to set an excellent reception state and when no mutual modulation is not performed, a connection to the path 1 side to attain excellent reception with sensitivity.
JP9590979A 1979-07-26 1979-07-26 Fm stereophonic tuner circuit Granted JPS5620345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9590979A JPS5620345A (en) 1979-07-26 1979-07-26 Fm stereophonic tuner circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9590979A JPS5620345A (en) 1979-07-26 1979-07-26 Fm stereophonic tuner circuit

Publications (2)

Publication Number Publication Date
JPS5620345A true JPS5620345A (en) 1981-02-25
JPS6221423B2 JPS6221423B2 (en) 1987-05-12

Family

ID=14150412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9590979A Granted JPS5620345A (en) 1979-07-26 1979-07-26 Fm stereophonic tuner circuit

Country Status (1)

Country Link
JP (1) JPS5620345A (en)

Also Published As

Publication number Publication date
JPS6221423B2 (en) 1987-05-12

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