JPS5631245A - Am stereo demodulating circuit - Google Patents

Am stereo demodulating circuit

Info

Publication number
JPS5631245A
JPS5631245A JP10608479A JP10608479A JPS5631245A JP S5631245 A JPS5631245 A JP S5631245A JP 10608479 A JP10608479 A JP 10608479A JP 10608479 A JP10608479 A JP 10608479A JP S5631245 A JPS5631245 A JP S5631245A
Authority
JP
Japan
Prior art keywords
low
circuit
pass filter
frequency modulation
signal
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
JP10608479A
Other languages
Japanese (ja)
Other versions
JPS6217909B2 (en
Inventor
Isao Akitake
Tsutomu Noda
Kazuhiko Yamazaki
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 JP10608479A priority Critical patent/JPS5631245A/en
Priority to US06/117,457 priority patent/US4349696A/en
Publication of JPS5631245A publication Critical patent/JPS5631245A/en
Publication of JPS6217909B2 publication Critical patent/JPS6217909B2/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
    • H04H20/44—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
    • H04H20/49—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 AM stereophonic broadcast systems

Landscapes

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

Abstract

PURPOSE:To prevent degradation of the separation degree in the low-frequency modulation signal, by providing a low-frequency modulation signal compensating circuit consisting of an inverter and an adder between the low-pass filter and the separation degree compensating circuit to control the gain of a gain control circuit. CONSTITUTION:The output of the AM detecting circuit is not only input to matrix circuit 17 but also given to low-pass filter 20. This low-pass filter 20 is provided with low-frequency modulation signal compensating circuit 60. In this circuit 60, the phase of the low-frequency modulation signal is inverted by inverter circuit 61, and the signal is output through capacitor 62, and the signal inverted by circuit 60 and the signal from low-pass filter 20 are added by adder 63 to cancel AC components. The gain of separation degree compensating circuit 30 is controlled by the DC voltage obtained in this manner.
JP10608479A 1979-02-05 1979-08-22 Am stereo demodulating circuit Granted JPS5631245A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10608479A JPS5631245A (en) 1979-08-22 1979-08-22 Am stereo demodulating circuit
US06/117,457 US4349696A (en) 1979-02-05 1980-02-01 AM Stereophonic demodulator circuit for amplitude/angle modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10608479A JPS5631245A (en) 1979-08-22 1979-08-22 Am stereo demodulating circuit

Publications (2)

Publication Number Publication Date
JPS5631245A true JPS5631245A (en) 1981-03-30
JPS6217909B2 JPS6217909B2 (en) 1987-04-20

Family

ID=14424684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10608479A Granted JPS5631245A (en) 1979-02-05 1979-08-22 Am stereo demodulating circuit

Country Status (1)

Country Link
JP (1) JPS5631245A (en)

Also Published As

Publication number Publication date
JPS6217909B2 (en) 1987-04-20

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