JPS57107669A - Monaural stereo switching circuit - Google Patents

Monaural stereo switching circuit

Info

Publication number
JPS57107669A
JPS57107669A JP18477880A JP18477880A JPS57107669A JP S57107669 A JPS57107669 A JP S57107669A JP 18477880 A JP18477880 A JP 18477880A JP 18477880 A JP18477880 A JP 18477880A JP S57107669 A JPS57107669 A JP S57107669A
Authority
JP
Japan
Prior art keywords
signal
output
tuning
detector
picks
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
JP18477880A
Other languages
Japanese (ja)
Inventor
Toshito Ichikawa
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP18477880A priority Critical patent/JPS57107669A/en
Publication of JPS57107669A publication Critical patent/JPS57107669A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H04H40/45—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 for FM stereophonic broadcast systems receiving
    • H04H40/81—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 for FM stereophonic broadcast systems receiving for stereo-monaural switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals

Abstract

PURPOSE:To make tuning easy and to enable smooth switching, by the switch from monaural to stereo state with reduced de-tuning noise in the reception of stereo broadcast. CONSTITUTION:A main channel signal detector 1 picks up an L+R signal and a sub-channel detector 2 picks up an L-R signal, an S curve signal and SK signal, from an intermediate frequency supplied from an intermediate amplifier. An electric field strength detector 3 generates an output when the reception electric field strength is a specified level or more, and a pilot signal detector picks up a pilot signal included in the L-R. A window comparator 5 produces an output, when the SK signal is at a constant range and tuning is taken. When the electric field strength is a constant value or more and a pilot signal is present, an AND gate 12 produces an output and a light emitting diode 14 illuminates. Further, when tuning is made, a switch circuit 10 is operative with the output of an AND gate 9 and L and R signals are obtained with a matrix circuit 11.
JP18477880A 1980-12-25 1980-12-25 Monaural stereo switching circuit Pending JPS57107669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18477880A JPS57107669A (en) 1980-12-25 1980-12-25 Monaural stereo switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18477880A JPS57107669A (en) 1980-12-25 1980-12-25 Monaural stereo switching circuit

Publications (1)

Publication Number Publication Date
JPS57107669A true JPS57107669A (en) 1982-07-05

Family

ID=16159135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18477880A Pending JPS57107669A (en) 1980-12-25 1980-12-25 Monaural stereo switching circuit

Country Status (1)

Country Link
JP (1) JPS57107669A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6123404A (en) * 1984-04-30 1986-01-31 モトロ−ラ・インコ−ポレ−テツド Tuning and stereoscopic signal double indicayor circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6123404A (en) * 1984-04-30 1986-01-31 モトロ−ラ・インコ−ポレ−テツド Tuning and stereoscopic signal double indicayor circuit
JPH0576205B2 (en) * 1984-04-30 1993-10-22 Motorola Inc

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