JPS60150861U - Signal discrimination circuit - Google Patents

Signal discrimination circuit

Info

Publication number
JPS60150861U
JPS60150861U JP1984038345U JP3834584U JPS60150861U JP S60150861 U JPS60150861 U JP S60150861U JP 1984038345 U JP1984038345 U JP 1984038345U JP 3834584 U JP3834584 U JP 3834584U JP S60150861 U JPS60150861 U JP S60150861U
Authority
JP
Japan
Prior art keywords
detection
output
circuit
signal
band
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
JP1984038345U
Other languages
Japanese (ja)
Other versions
JPH0352064Y2 (en
Inventor
清 長谷川
Original Assignee
三洋電機株式会社
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 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP1984038345U priority Critical patent/JPS60150861U/en
Publication of JPS60150861U publication Critical patent/JPS60150861U/en
Application granted granted Critical
Publication of JPH0352064Y2 publication Critical patent/JPH0352064Y2/ja
Granted legal-status Critical Current

Links

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は米国のテレビ音声多重信号の周波数スペクトラ
ムを示す図、第２図はその受信システムに使用される判
別回路の従来例を示すブロック図である。第３図は本考
案による信号判別回路の一実施例を示し、第４図ａ，　
ｂはそのｐ，Ｑ点の直流出力電圧と受信電界強度との関
係を示す特性図である。 ５、６・・・第１第２検出回路、７・・・コンパレータ
、１０・・・同調増幅回路、１３・・・非同調広帯域増
幅回路。FIG. 1 is a diagram showing the frequency spectrum of a television audio multiplex signal in the United States, and FIG. 2 is a block diagram showing a conventional example of a discrimination circuit used in the receiving system. FIG. 3 shows an embodiment of the signal discrimination circuit according to the present invention, and FIG.
b is a characteristic diagram showing the relationship between the DC output voltage and the received electric field strength at points p and Q. 5, 6... First and second detection circuit, 7... Comparator, 10... Tuned amplifier circuit, 13... Untuned broadband amplifier circuit.

Claims (3)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）受信した周波数多重信号中の特定帯域の信号を判
別するための回路であって、多重信号中の前記特定帯域
の抽出出力を検出する第１の検出回路と、多重信号中の
前記特定帯域を含み該帯域よりも広い帯域の抽出出力を
検出する第２の検出回藝と、この第１第２検出回路の出
力の大小比較を行なうコンパレータとを備え、受信電界
強度が所定レベル以上の状態で前記特定帯域の信号が存
在するときは第１検出出力が第２検出出力よりも大きく
、受信電界強度が上記の状態で前記特定帯域の信号が存
在しないときは第１検出出力が第２検出出力よりも小さ
くなるように前記第１第２検出回路を構成し、前記コン
パレータの出力を判別出力とするようにした信号判別回
路。(1) A circuit for determining a signal in a specific band in a received frequency multiplexed signal, the first detection circuit detecting an extracted output of the specific band in the multiplexed signal, and a first detection circuit for detecting the extracted output of the specific band in the multiplexed signal; A second detection circuit detects the extracted output of a band wider than the band including the band, and a comparator that compares the outputs of the first and second detection circuits. When the signal in the specific band is present in the state, the first detection output is larger than the second detection output, and when the received field strength is in the above state and the signal in the specific band is not present, the first detection output is higher than the second detection output. A signal discrimination circuit, wherein the first and second detection circuits are configured so that the output is smaller than the detection output, and the output of the comparator is used as the discrimination output. （２）前記第１第２検出回路は前記特定帯域及び前記広
帯域の各抽出出力を増幅する増幅回路を備え。前記第１
第２検出出力が前記関係になるように上記各増幅回路の
増幅度が設定されていることを特徴とする請求 信号判別回路。(2) The first and second detection circuits include an amplifier circuit that amplifies the extracted outputs of the specific band and the wide band. Said first
A claim signal discriminating circuit characterized in that the degree of amplification of each of the amplifier circuits is set so that the second detection output has the relationship described above. （３）　　第１検出回路内の増幅回路は、前記特定帯域
のキャリア周波数に同調する同調増幅器であり、第２検
出回路内の増幅回路は非同調広帯域増幅器であることを
特徴とする登録請求の範囲第２項記載の信号判別回路。(3) The amplifier circuit in the first detection circuit is a tuned amplifier tuned to the carrier frequency of the specific band, and the amplifier circuit in the second detection circuit is a non-tuned wideband amplifier. The signal discrimination circuit according to range 2.
JP1984038345U 1984-03-16 1984-03-16 Signal discrimination circuit Granted JPS60150861U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984038345U JPS60150861U (en) 1984-03-16 1984-03-16 Signal discrimination circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984038345U JPS60150861U (en) 1984-03-16 1984-03-16 Signal discrimination circuit

Publications (2)

Publication Number Publication Date
JPS60150861U true JPS60150861U (en) 1985-10-07
JPH0352064Y2 JPH0352064Y2 (en) 1991-11-11

Family

ID=30545264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984038345U Granted JPS60150861U (en) 1984-03-16 1984-03-16 Signal discrimination circuit

Country Status (1)

Country Link
JP (1) JPS60150861U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62176378A (en) * 1986-01-03 1987-08-03 ジエネラル　インストラメント　コ−ポレ−シヨン Apparatus and method for receiving and reproducing sound of stereophonic television receiver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526761A (en) * 1978-08-15 1980-02-26 Matsushita Electric Ind Co Ltd Television sound multiplex demodulator circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526761A (en) * 1978-08-15 1980-02-26 Matsushita Electric Ind Co Ltd Television sound multiplex demodulator circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62176378A (en) * 1986-01-03 1987-08-03 ジエネラル　インストラメント　コ−ポレ−シヨン Apparatus and method for receiving and reproducing sound of stereophonic television receiver

Also Published As

Publication number Publication date
JPH0352064Y2 (en) 1991-11-11

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