JPS56162556A - Stereophonic modulator - Google Patents

Stereophonic modulator

Info

Publication number
JPS56162556A
JPS56162556A JP6590280A JP6590280A JPS56162556A JP S56162556 A JPS56162556 A JP S56162556A JP 6590280 A JP6590280 A JP 6590280A JP 6590280 A JP6590280 A JP 6590280A JP S56162556 A JPS56162556 A JP S56162556A
Authority
JP
Japan
Prior art keywords
oscillator
frequency
audio
signals
output
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.)
Pending
Application number
JP6590280A
Other languages
Japanese (ja)
Inventor
Toshihiko Suzuki
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.)
EIDEN CO Ltd
EIDEN KK
Original Assignee
EIDEN CO Ltd
EIDEN KK
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 EIDEN CO Ltd, EIDEN KK filed Critical EIDEN CO Ltd
Priority to JP6590280A priority Critical patent/JPS56162556A/en
Publication of JPS56162556A publication Critical patent/JPS56162556A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems

Landscapes

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

Abstract

PURPOSE:To eliminate the cause of deterioration in separation by forming a matrix in the stage of right and left audio signals and by setting the frequency shift of a wave to be inputted to one terminal of a superposing device and modulated corresponding to audio signals, which are a half as great as the stereophonic right and left signals, in the next state of superposition. CONSTITUTION:An input terminal 1 for a left signal L is connected to the 1st audio frequency modulating oscillator U1a whose modulation sensitivity is set a half, and an input terminal 2 for the other right signal R to the 2nd audio frequency modulating oscillator U2b. The oscillation frequency of this oscillator U1a is equalized to the 1st audio carrier frequency F1, and its modulation sensitivity is compared with that of the oscillator U2b and set a half; when stereophonic right and left signals have the same input level, the frequency shift decreases to half. Further, the oscillation frequency of the oscillator U2b is set to the 2nd audio carrier frequency F2 and while the output of the oscillator U1a is applied direct to a frequency mixer MIX, the output of the oscillator U1b is applied to the mixer MIX via a frequency divider U3a whose frequency division ratio is to half. Then, the output of the mixer MIX and that of the oscillator U2b are applied to a superposing device 4.
JP6590280A 1980-05-20 1980-05-20 Stereophonic modulator Pending JPS56162556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6590280A JPS56162556A (en) 1980-05-20 1980-05-20 Stereophonic modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6590280A JPS56162556A (en) 1980-05-20 1980-05-20 Stereophonic modulator

Publications (1)

Publication Number Publication Date
JPS56162556A true JPS56162556A (en) 1981-12-14

Family

ID=13300352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6590280A Pending JPS56162556A (en) 1980-05-20 1980-05-20 Stereophonic modulator

Country Status (1)

Country Link
JP (1) JPS56162556A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107228A (en) * 1977-02-28 1978-09-19 Philips Nv 22fm audio carrier television system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53107228A (en) * 1977-02-28 1978-09-19 Philips Nv 22fm audio carrier television system

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