JPS5526761A - Television sound multiplex demodulator circuit - Google Patents

Television sound multiplex demodulator circuit

Info

Publication number
JPS5526761A
JPS5526761A JP9973078A JP9973078A JPS5526761A JP S5526761 A JPS5526761 A JP S5526761A JP 9973078 A JP9973078 A JP 9973078A JP 9973078 A JP9973078 A JP 9973078A JP S5526761 A JPS5526761 A JP S5526761A
Authority
JP
Japan
Prior art keywords
circuit
signal
stereophonic
filter
sub
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
JP9973078A
Other languages
Japanese (ja)
Inventor
Yoshio Horiike
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9973078A priority Critical patent/JPS5526761A/en
Publication of JPS5526761A publication Critical patent/JPS5526761A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE:To perform stable demodulation and also to reduce lead switches by one by automatically alternating between stereophonic operation and different-king program operation according to the existence of a sub-channel signal and the output of a lead filter. CONSTITUTION:Only one lead filter 15 is used here. In case of stereophonic broadcase, a pilot signal of 55.125 KHz is detected 13 from the output of FM detection 5 and then AM-detected 14, and filter 15 extracts a signal of 982.5 Hz, thereby putting changeover circuit 10 into stereophonic operation by switching via Schmitt circuit 16. For the reception of different program broadcast, the output of detection circuit 14 is removed by filter 15 because its frequency is 922.5 Hz and circuit 16 will not operated. Therefore, stereophonic switching signal is not generated and gate circuit 11 is ON; and Schmitt circuit 12 operates on receiving a signal of the sub- channel band from BPF8 to put circuit 10 into different-program operation, thereby obtaining a signal with the sub-channel FM-detected 9.
JP9973078A 1978-08-15 1978-08-15 Television sound multiplex demodulator circuit Pending JPS5526761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9973078A JPS5526761A (en) 1978-08-15 1978-08-15 Television sound multiplex demodulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9973078A JPS5526761A (en) 1978-08-15 1978-08-15 Television sound multiplex demodulator circuit

Publications (1)

Publication Number Publication Date
JPS5526761A true JPS5526761A (en) 1980-02-26

Family

ID=14255172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9973078A Pending JPS5526761A (en) 1978-08-15 1978-08-15 Television sound multiplex demodulator circuit

Country Status (1)

Country Link
JP (1) JPS5526761A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556075U (en) * 1978-10-12 1980-04-16
JPS60150861U (en) * 1984-03-16 1985-10-07 三洋電機株式会社 Signal discrimination circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556075U (en) * 1978-10-12 1980-04-16
JPS60150861U (en) * 1984-03-16 1985-10-07 三洋電機株式会社 Signal discrimination circuit
JPH0352064Y2 (en) * 1984-03-16 1991-11-11

Similar Documents

Publication Publication Date Title
JPS5526761A (en) Television sound multiplex demodulator circuit
FR2305903A1 (en) Closed circuit TV receiver - switches out audio channel when TV sync. signal is received
JPS51114802A (en) Fm stereo receiver
JPS56116337A (en) Fm receiver
JPS5578683A (en) Receiver
JPS5617528A (en) Fm receiver
JPS5578681A (en) Receiver
JPS5564478A (en) Television sound multiplex receiver
JPS55137729A (en) Multiple signal receiver
JPS5578685A (en) Receiver
JPS5448403A (en) Receiver
JPS524104A (en) Receiving noise volume detection system
JPS5294712A (en) Receiver
JPS6481531A (en) Receiver
JPS5578682A (en) Receiver
JPS55147048A (en) Emergency radio broadcast system
JPS5413714A (en) Multi-frequency signal reception system
JPS5610750A (en) Radio receiver
JPS5775044A (en) Am receiver
JPS5550784A (en) Control signal discriminator in voice multiplex broadcasting receiver
JPS53130902A (en) Fm stereo receiver
JPS5658344A (en) Signal receiver
JPS51150202A (en) Fm receiver
JPS551718A (en) Receiver for television audio multiplex broadcast
JPS5550785A (en) Control signal discriminator in voice multiplex broadcasting receiver