JPS6335359U - - Google Patents
Info
- Publication number
- JPS6335359U JPS6335359U JP12998286U JP12998286U JPS6335359U JP S6335359 U JPS6335359 U JP S6335359U JP 12998286 U JP12998286 U JP 12998286U JP 12998286 U JP12998286 U JP 12998286U JP S6335359 U JPS6335359 U JP S6335359U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- zener diode
- communication path
- slave unit
- transistor
- 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 3
- 230000010354 integration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Control Of Amplification And Gain Control (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Description
第１図は本考案一実施例のインターホン回路図
、第２図は従来のインターホン回路図、第３図は
同じくハイブリツドトランス回路図である。
１…ベースユニツト受話機、２…ＴＸ路、４…
ハイブリツドトランス回路、５…通話路、６…Ｒ
Ｘ路、１０…子機、１４…ミユーテイングトラン
ジスタ、１５…ツエナーダイオード、１６…可変
抵抗器、１７…コンデンサ、１８…抵抗器、１９
…積分回路。
FIG. 1 is an intercom circuit diagram of an embodiment of the present invention, FIG. 2 is a conventional intercom circuit diagram, and FIG. 3 is a hybrid transformer circuit diagram. 1...Base unit receiver, 2...TX path, 4...
Hybrid transformer circuit, 5...communication path, 6...R
X path, 10... Child unit, 14... Muting transistor, 15... Zener diode, 16... Variable resistor, 17... Capacitor, 18... Resistor, 19
...integrator circuit.
Claims (1)
イブリツドトランス回路を有するインターホン回
路において、 子機と接続する通話路に接続されたツエナーダ
イオードと、該ツエナーダイオードに直列に接続
される積分回路と、前記ツエナーダイオードと積
分回路の接続点に制御電極が接続され親機の送話
路（ＴＸ路）に接続されたミユーテイングトラン
ジスタとを備え、 前記通話路の子機非接続時には前記ＤＣ電圧に
よる前記ツエナーダイオードの定電圧に基ずいて
前記トランジスタをオンさせて親機からの送話信
号をミユートし、かつ前記通話路の子機接続時に
前記通話路の送話信号が所定レベルを越えると前
記ツエナーダイオードと積分回路とトランジスタ
とを自動レベル調節（ＡＬＣ）回路として使用す
ることを特徴とするインターホン回路。[Claim for Utility Model Registration] In an intercom circuit having a hybrid transformer circuit that connects a base unit and a slave unit and in which a DC voltage is superimposed, a Zener diode connected to a communication path connecting the slave unit, and the Zener diode an integrating circuit connected in series to the communication path; and a muting transistor having a control electrode connected to a connection point between the Zener diode and the integration circuit and connected to a transmission path (TX path) of the base unit, When the slave unit is not connected, the transistor is turned on based on the constant voltage of the Zener diode caused by the DC voltage, and the transmission signal from the base unit is muted, and when the slave unit is connected to the communication path, the transmission signal of the communication path is muted. An intercom circuit characterized in that when a speech signal exceeds a predetermined level, the Zener diode, the integrating circuit, and the transistor are used as an automatic level control (ALC) circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12998286U JPS6335359U (en) | 1986-08-26 | 1986-08-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12998286U JPS6335359U (en) | 1986-08-26 | 1986-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6335359U true JPS6335359U (en) | 1988-03-07 |
Family
ID=31027052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12998286U Pending JPS6335359U (en) | 1986-08-26 | 1986-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6335359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734561A (en) * | 1993-07-23 | 1995-02-03 | Nichias Corp | Fire-proof coating method of steel skeleton and fire-proof coated structure thereof |
-
1986
- 1986-08-26 JP JP12998286U patent/JPS6335359U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734561A (en) * | 1993-07-23 | 1995-02-03 | Nichias Corp | Fire-proof coating method of steel skeleton and fire-proof coated structure thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6335359U (en) | ||
| JPS5919493Y2 (en) | Input/output separation circuit | |
| JPS63138719U (en) | ||
| JPS623927Y2 (en) | ||
| JPS62127155U (en) | ||
| JPS599660U (en) | Transmission prevention circuit during no modulation | |
| JPH0163217U (en) | ||
| JPS6368249U (en) | ||
| JPS6316712U (en) | ||
| JPS6444712U (en) | ||
| JPH0221956U (en) | ||
| JPS6448924U (en) | ||
| JPH0228132U (en) | ||
| JPS6330036U (en) | ||
| JPS6374817U (en) | ||
| JPS63102333U (en) | ||
| JPH0244425U (en) | ||
| JPS5984911U (en) | volume adjustment circuit | |
| JPS61101806U (en) | ||
| JPS60116765U (en) | Telemeter communication circuit | |
| JPS6355618U (en) | ||
| JPS6164725U (en) | ||
| JPS63173926U (en) | ||
| JPH01124711U (en) | ||
| JPS6433219U (en) |