JPH0443053U - - Google Patents
Info
- Publication number
- JPH0443053U JPH0443053U JP8319490U JP8319490U JPH0443053U JP H0443053 U JPH0443053 U JP H0443053U JP 8319490 U JP8319490 U JP 8319490U JP 8319490 U JP8319490 U JP 8319490U JP H0443053 U JPH0443053 U JP H0443053U
- Authority
- JP
- Japan
- Prior art keywords
- side sound
- prevention circuit
- interphone
- telephone
- sound prevention
- 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
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Description
図は本考案の一実施例を示し、第１図は防側音
回路を内蔵するインタホン接続用インターフエー
スのブロツク図、第２図は防側音回路の回路図で
ある。
１……電話機、２……インタホン、４……防側
音回路、７，８，９……抵抗器、１０……半導体
インダクタ。
The figures show one embodiment of the present invention, with FIG. 1 being a block diagram of an interface for connecting an interphone incorporating a side sound protection circuit, and FIG. 2 being a circuit diagram of the side sound protection circuit. 1... Telephone, 2... Intercom, 4... Side sound protection circuit, 7, 8, 9... Resistor, 10... Semiconductor inductor.
Claims (1)
回線に介装し、側音を減衰するインタホン接続用
防側音回路に於て、前記防側音回路を半導体イン
ダクタと抵抗器によるブリツジ回路構成としたこ
とを特徴とする電話機のインタホン接続用防側音
回路。 In a side sound prevention circuit for connecting an interphone which is installed in a simultaneous transmission/reception communication line connecting a telephone and an interphone and attenuates side sound, the side sound prevention circuit has a bridge circuit configuration using a semiconductor inductor and a resistor. A side sound prevention circuit for connecting a telephone intercom, which is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8319490U JPH0443053U (en) | 1990-08-06 | 1990-08-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8319490U JPH0443053U (en) | 1990-08-06 | 1990-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0443053U true JPH0443053U (en) | 1992-04-13 |
Family
ID=31630655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8319490U Pending JPH0443053U (en) | 1990-08-06 | 1990-08-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443053U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01241954A (en) * | 1988-03-23 | 1989-09-26 | Nec Corp | Balancing network |
| JPH0238853B2 (en) * | 1983-03-17 | 1990-09-03 | Robaato Sutoorei Babinton |
-
1990
- 1990-08-06 JP JP8319490U patent/JPH0443053U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238853B2 (en) * | 1983-03-17 | 1990-09-03 | Robaato Sutoorei Babinton | |
| JPH01241954A (en) * | 1988-03-23 | 1989-09-26 | Nec Corp | Balancing network |