JPS6454449U - - Google Patents
Info
- Publication number
- JPS6454449U JPS6454449U JP1987148177U JP14817787U JPS6454449U JP S6454449 U JPS6454449 U JP S6454449U JP 1987148177 U JP1987148177 U JP 1987148177U JP 14817787 U JP14817787 U JP 14817787U JP S6454449 U JPS6454449 U JP S6454449U
- Authority
- JP
- Japan
- Prior art keywords
- polarity
- detection circuit
- audio signal
- amplifier
- outputs
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005236 sound signal Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
Description
第１図は本考案の一実施例を示す構成図である
。
１……有線放送スピーカ制御増幅器、１０……
極性検出回路、１１……消去回路、１２……増幅
器、１３……スピーカ。
FIG. 1 is a block diagram showing an embodiment of the present invention. 1...Cable broadcast speaker control amplifier, 10...
Polarity detection circuit, 11...Elimination circuit, 12...Amplifier, 13...Speaker.
Claims (1)
、所定の極性である場合には、回線からの音声信
号を受け取つて出力する極性検出回路と、 前記回線から前記極性検出回路に入力される呼
び出し信号を消去する消去回路と、 前記極性検出回路が出力する音声信号を増幅し
て出力する増幅器と、 前記増幅器からの音声信号を音に変換するスピ
ーカとを備えた有線放送スピーカ制御増幅器。[Claims for Utility Model Registration] A polarity detection circuit that detects the polarity of a line connected to a fixed-air switching device and, if the polarity is a predetermined polarity, receives and outputs an audio signal from the line; An erasing circuit that erases a call signal input to the polarity detection circuit, an amplifier that amplifies and outputs the audio signal output from the polarity detection circuit, and a speaker that converts the audio signal from the amplifier into sound. Cable broadcast speaker control amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987148177U JPS6454449U (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987148177U JPS6454449U (en) | 1987-09-30 | 1987-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6454449U true JPS6454449U (en) | 1989-04-04 |
Family
ID=31419260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987148177U Pending JPS6454449U (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6454449U (en) |
-
1987
- 1987-09-30 JP JP1987148177U patent/JPS6454449U/ja active Pending
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