JPS554119A - Stereo am broadcasting modulation circuit - Google Patents

Stereo am broadcasting modulation circuit

Info

Publication number
JPS554119A
JPS554119A JP7666878A JP7666878A JPS554119A JP S554119 A JPS554119 A JP S554119A JP 7666878 A JP7666878 A JP 7666878A JP 7666878 A JP7666878 A JP 7666878A JP S554119 A JPS554119 A JP S554119A
Authority
JP
Japan
Prior art keywords
circuit
output
modulation
stereo
modulator
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
JP7666878A
Other languages
Japanese (ja)
Other versions
JPS5831134B2 (en
Inventor
Masaaki Sasada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7666878A priority Critical patent/JPS5831134B2/en
Publication of JPS554119A publication Critical patent/JPS554119A/en
Publication of JPS5831134B2 publication Critical patent/JPS5831134B2/en
Expired 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
    • 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

Landscapes

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

Abstract

PURPOSE:To obtain a stereo AM broadcasting modulation circuit which gives a receiver compatibility, stereophonic and monophonic functions, by adding a multiplier circuit, differential circuit, square-law circuit, and balancing circuit to a conventional modulator. CONSTITUTION:The product of sum signal (s) and difference signal (d) is found by multiplier circuit 7 and the inversion input of the 1st differential circuit 8 is applied to obtain output Vd. Difference signal (d), on the other hand, is squared by square-law circuit 9 and applied to balancing circuit 10 to obtain output Vb. Then, output Vd of the 1st differential circuit is applied to PM modulator 5 to obtain output Vp. Further, a difference between PM modulation output Vp and balancing modulation output Vb is obtained by the 2nd differential circuit 11 and then applied to AM modulator 6, where AM modulation is performed by sum signal (s), so that required broadcast output Vo(t) can be obtained. This Vo(t) is multiplied by itself and detected to find the low-frequency component, thereby obtaining a numeral with secondary distortion D and crosstalk reduced greatly. A conventional monoaural-only receiver is therefore capable of receiving a stereo broadcast without substantial deterioration.
JP7666878A 1978-06-23 1978-06-23 Modulation circuit for stereo AM broadcasting Expired JPS5831134B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7666878A JPS5831134B2 (en) 1978-06-23 1978-06-23 Modulation circuit for stereo AM broadcasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7666878A JPS5831134B2 (en) 1978-06-23 1978-06-23 Modulation circuit for stereo AM broadcasting

Publications (2)

Publication Number Publication Date
JPS554119A true JPS554119A (en) 1980-01-12
JPS5831134B2 JPS5831134B2 (en) 1983-07-04

Family

ID=13611786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7666878A Expired JPS5831134B2 (en) 1978-06-23 1978-06-23 Modulation circuit for stereo AM broadcasting

Country Status (1)

Country Link
JP (1) JPS5831134B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336374U (en) * 1986-08-26 1988-03-09
JPS6345683U (en) * 1986-09-11 1988-03-28

Also Published As

Publication number Publication date
JPS5831134B2 (en) 1983-07-04

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