JPS6164771U - - Google Patents
Info
- Publication number
- JPS6164771U JPS6164771U JP14753084U JP14753084U JPS6164771U JP S6164771 U JPS6164771 U JP S6164771U JP 14753084 U JP14753084 U JP 14753084U JP 14753084 U JP14753084 U JP 14753084U JP S6164771 U JPS6164771 U JP S6164771U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmitting
- circuit
- receiving
- level
- 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
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 1
Description
第１図はこの考案の送受切換装置の実施例を示
すブロツク図、第２図は従来の送受切換装置を示
すブロツク図である。
２……電話回路、４……信号送受回路、６……
送信信号系統、８……受信信号系統、１４……送
信側信号切換回路、１６……受信側信号切換回路
、２４……比較器、２６……切換制御回路。
FIG. 1 is a block diagram showing an embodiment of the transmission/reception switching device of this invention, and FIG. 2 is a block diagram showing a conventional transmission/reception switching device. 2...Telephone circuit, 4...Signal transmission/reception circuit, 6...
Transmission signal system, 8... Reception signal system, 14... Transmission side signal switching circuit, 16... Receiving side signal switching circuit, 24... Comparator, 26... Switching control circuit.
Claims (1)
送信すべき音声信号を電話回線に送出する信号送
受回路と、この信号送受回路の送信信号入力側に
設置されて前記送信信号を通過または遮断する送
信側信号切換回路と、前記信号送受回路の受信信
号出力側に設置されて受信信号を通過または遮断
する受信側信号切柄回路と、前記信号送受回路が
出力する前記受信信号のレベルと前記送信信号の
レベルとを比較する比較器と、この比較器の比較
出力に応じて送信側信号切換回路または受信側信
号切換回路の信号の通過または遮断を選択的に切
り換える切換制御回路と、前記信号送受回路の受
信信号側出力部に設置されてて信号レベルを調整
する信号レベル調整手段とから構成したことを特
徴とする送受切換装置。 Along with receiving audio signals from the telephone circuit,
a signal transmitting/receiving circuit that sends an audio signal to be transmitted to a telephone line; a transmitting side signal switching circuit installed on the transmitting signal input side of the signal transmitting/receiving circuit to pass or block the transmitting signal; and a receiving circuit for the signal transmitting/receiving circuit. A receiving side signal cutting circuit installed on the signal output side to pass or block the received signal, a comparator for comparing the level of the received signal outputted by the signal transmitting/receiving circuit and the level of the transmitting signal, and this comparison. a switching control circuit for selectively passing or blocking the signal of the transmitting side signal switching circuit or the receiving side signal switching circuit according to the comparison output of the device; 1. A transmission/reception switching device comprising: signal level adjustment means for adjusting a level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14753084U JPS6164771U (en) | 1984-09-30 | 1984-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14753084U JPS6164771U (en) | 1984-09-30 | 1984-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6164771U true JPS6164771U (en) | 1986-05-02 |
Family
ID=30705755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14753084U Pending JPS6164771U (en) | 1984-09-30 | 1984-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6164771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62198749U (en) * | 1986-06-06 | 1987-12-17 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58130659A (en) * | 1982-01-29 | 1983-08-04 | Fujitsu Ltd | Loudspeaker telephone set |
-
1984
- 1984-09-30 JP JP14753084U patent/JPS6164771U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58130659A (en) * | 1982-01-29 | 1983-08-04 | Fujitsu Ltd | Loudspeaker telephone set |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62198749U (en) * | 1986-06-06 | 1987-12-17 |
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