JPS5724138A - Am stereo demodulation circuit - Google Patents

Am stereo demodulation circuit

Info

Publication number
JPS5724138A
JPS5724138A JP9874480A JP9874480A JPS5724138A JP S5724138 A JPS5724138 A JP S5724138A JP 9874480 A JP9874480 A JP 9874480A JP 9874480 A JP9874480 A JP 9874480A JP S5724138 A JPS5724138 A JP S5724138A
Authority
JP
Japan
Prior art keywords
afc
signals
output
adders
detector
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
JP9874480A
Other languages
Japanese (ja)
Other versions
JPS6313579B2 (en
Inventor
Tsutomu Noda
Isao Akitake
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9874480A priority Critical patent/JPS5724138A/en
Publication of JPS5724138A publication Critical patent/JPS5724138A/en
Publication of JPS6313579B2 publication Critical patent/JPS6313579B2/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 prevent the deterioration in degree of separation due to the difference in the input and output characteristics of an AM and a PM detections, by mixing the outputs of matrix circuit each other and controlling the proportion of this mixture with the output of an AFC. CONSTITUTION:Electromagnetic waves of an AM stereo system are detected at an AM detector 12 to obtain a sum signal (L+R) and at a PM detector 14 to obtain a difference signal (L-R), and the signals are applied to a matrix circuit 15. The signals spearated left and right are applied to adders 24, 23 via variable gain amplifiers 21, 22, respectively. The gain of the variable gain amplifiers 21, 22 is controlled with an AFC output picked up at an AFC low-pass filter 18. Thus, the cross talk component is canceled for left ad right signals L and R from outputs 16, 17 of adders 23, 24.
JP9874480A 1980-07-21 1980-07-21 Am stereo demodulation circuit Granted JPS5724138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9874480A JPS5724138A (en) 1980-07-21 1980-07-21 Am stereo demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9874480A JPS5724138A (en) 1980-07-21 1980-07-21 Am stereo demodulation circuit

Publications (2)

Publication Number Publication Date
JPS5724138A true JPS5724138A (en) 1982-02-08
JPS6313579B2 JPS6313579B2 (en) 1988-03-26

Family

ID=14227979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9874480A Granted JPS5724138A (en) 1980-07-21 1980-07-21 Am stereo demodulation circuit

Country Status (1)

Country Link
JP (1) JPS5724138A (en)

Also Published As

Publication number Publication date
JPS6313579B2 (en) 1988-03-26

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