JPS5723345A - Am stereo demodulator - Google Patents

Am stereo demodulator

Info

Publication number
JPS5723345A
JPS5723345A JP9724280A JP9724280A JPS5723345A JP S5723345 A JPS5723345 A JP S5723345A JP 9724280 A JP9724280 A JP 9724280A JP 9724280 A JP9724280 A JP 9724280A JP S5723345 A JPS5723345 A JP S5723345A
Authority
JP
Japan
Prior art keywords
circuit
wide
multiplied
signal
demodulating
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
JP9724280A
Other languages
Japanese (ja)
Other versions
JPS6214976B2 (en
Inventor
Takekatsu Ooyama
Akito Umemoto
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 Corp
Original Assignee
NEC Corp
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 Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9724280A priority Critical patent/JPS5723345A/en
Publication of JPS5723345A publication Critical patent/JPS5723345A/en
Publication of JPS6214976B2 publication Critical patent/JPS6214976B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To improve a quality of a demodulation signal and also to convert a multiplying stage to nonadjustment, by demodulating a subchannel signal, after frequency has been multiplied by a wide band multiplying circuit. CONSTITUTION:As for an AM stereo modulation signal, its main channel is demodulated by an AM demodulating circuit 1, also its AM component is removed by a limiting circuit 2, and after that, it is distributed by a wide band distributor in a wide-band multiplying circuit 3, is mixed by a balance mixer, is multiplied by a filter, and its phase deviation is expanded. Subsequently, its subchannel is demodulated by sending a signal whose phase deviation has been expanded, to a phase demodulating circuit 5 through the filter 4. Accordingly, S/N at the time of demodulation is elevated in accordance with a multiplied portion by the wide-band multiplying circuit 3.
JP9724280A 1980-07-16 1980-07-16 Am stereo demodulator Granted JPS5723345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9724280A JPS5723345A (en) 1980-07-16 1980-07-16 Am stereo demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9724280A JPS5723345A (en) 1980-07-16 1980-07-16 Am stereo demodulator

Publications (2)

Publication Number Publication Date
JPS5723345A true JPS5723345A (en) 1982-02-06
JPS6214976B2 JPS6214976B2 (en) 1987-04-04

Family

ID=14187128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9724280A Granted JPS5723345A (en) 1980-07-16 1980-07-16 Am stereo demodulator

Country Status (1)

Country Link
JP (1) JPS5723345A (en)

Also Published As

Publication number Publication date
JPS6214976B2 (en) 1987-04-04

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